diff --git a/build-logic/src/main/java/org/teavm/buildutil/PublishTeaVMPlugin.java b/build-logic/src/main/java/org/teavm/buildutil/PublishTeaVMPlugin.java
index d86a2fce9..ee1721315 100644
--- a/build-logic/src/main/java/org/teavm/buildutil/PublishTeaVMPlugin.java
+++ b/build-logic/src/main/java/org/teavm/buildutil/PublishTeaVMPlugin.java
@@ -34,7 +34,12 @@ public abstract class PublishTeaVMPlugin implements Plugin<Project> {
     public void apply(Project target) {
         target.getPlugins().apply(PublishingPlugin.class);
         target.getPlugins().apply(MavenPublishPlugin.class);
-        target.getPlugins().apply(SigningPlugin.class);
+
+        var publish = Boolean.parseBoolean(target.getProviders().gradleProperty("teavm.mavenCentral.publish")
+                .getOrElse("false"));
+        if (publish) {
+            target.getPlugins().apply(SigningPlugin.class);
+        }
 
         var extension = new ExtensionImpl();
         target.getExtensions().add(PublishTeaVMExtension.class, EXTENSION_NAME, extension);
@@ -45,8 +50,6 @@ public abstract class PublishTeaVMPlugin implements Plugin<Project> {
                     customizePublication(target, publication, extension);
                 });
             });
-            var publish = Boolean.parseBoolean(target.getProviders().gradleProperty("teavm.mavenCentral.publish")
-                    .getOrElse("false"));
             if (publish) {
                 var signing = target.getExtensions().getByType(SigningExtension.class);
                 publishing.getPublications().configureEach(signing::sign);
diff --git a/classlib/build.gradle.kts b/classlib/build.gradle.kts
index 2ba504f1e..17334d8c5 100644
--- a/classlib/build.gradle.kts
+++ b/classlib/build.gradle.kts
@@ -29,7 +29,6 @@ dependencies {
     api(project(":jso:impl"))
     api(project(":metaprogramming:impl"))
     api(libs.commons.io)
-    api(libs.gson)
     api(libs.jzlib)
     api(libs.jodaTime)
 
diff --git a/classlib/src/main/java/org/teavm/classlib/impl/unicode/CLDRReader.java b/classlib/src/main/java/org/teavm/classlib/impl/unicode/CLDRReader.java
index 23d8208ad..910433f2e 100644
--- a/classlib/src/main/java/org/teavm/classlib/impl/unicode/CLDRReader.java
+++ b/classlib/src/main/java/org/teavm/classlib/impl/unicode/CLDRReader.java
@@ -15,24 +15,28 @@
  */
 package org.teavm.classlib.impl.unicode;
 
-import com.google.gson.JsonElement;
-import com.google.gson.JsonObject;
-import com.google.gson.JsonParser;
 import java.io.BufferedInputStream;
 import java.io.IOException;
 import java.io.InputStream;
 import java.io.InputStreamReader;
+import java.nio.charset.StandardCharsets;
 import java.util.ArrayList;
 import java.util.Arrays;
 import java.util.Collections;
 import java.util.LinkedHashMap;
 import java.util.LinkedHashSet;
-import java.util.List;
 import java.util.Map;
 import java.util.Properties;
 import java.util.Set;
 import java.util.zip.ZipEntry;
 import java.util.zip.ZipInputStream;
+import org.teavm.common.json.JsonObjectValue;
+import org.teavm.common.json.JsonParser;
+import org.teavm.common.json.JsonValue;
+import org.teavm.common.json.JsonValueParserVisitor;
+import org.teavm.common.json.JsonValueProvider;
+import org.teavm.common.json.JsonVisitingConsumer;
+import org.teavm.common.json.JsonVisitor;
 
 public class CLDRReader {
     private static final String[] weekdayKeys = { "sun", "mon", "tue", "wed", "thu", "fri", "sat" };
@@ -132,7 +136,7 @@ public class CLDRReader {
                         readTimeZones(localeName, localeInfo, input);
                         break;
                     case "ca-gregorian.json": {
-                        JsonObject root = (JsonObject) new JsonParser().parse(new InputStreamReader(input));
+                        var root = (JsonObjectValue) parse(input);
                         readEras(localeName, localeInfo, root);
                         readAmPms(localeName, localeInfo, root);
                         readMonths(localeName, localeInfo, root);
@@ -158,50 +162,49 @@ public class CLDRReader {
     }
 
     private void readLanguages(String localeCode, CLDRLocale locale, InputStream input) {
-        JsonObject root = (JsonObject) new JsonParser().parse(new InputStreamReader(input));
-        JsonObject languagesJson = root.get("main").getAsJsonObject().get(localeCode).getAsJsonObject()
-                .get("localeDisplayNames").getAsJsonObject().get("languages").getAsJsonObject();
-        for (Map.Entry<String, JsonElement> property : languagesJson.entrySet()) {
+        var root = parse(input).asObject();
+        var languagesJson = root.get("main").asObject().get(localeCode).asObject()
+                .get("localeDisplayNames").asObject().get("languages").asObject();
+        for (var property : languagesJson.entrySet()) {
             String language = property.getKey();
             if (availableLanguages.contains(language)) {
-                locale.languages.put(language, property.getValue().getAsString());
+                locale.languages.put(language, property.getValue().asString());
             }
         }
     }
 
     private void readCountries(String localeCode, CLDRLocale locale, InputStream input) {
-        JsonObject root = (JsonObject) new JsonParser().parse(new InputStreamReader(input));
-        JsonObject countriesJson = root.get("main").getAsJsonObject().get(localeCode).getAsJsonObject()
-                .get("localeDisplayNames").getAsJsonObject().get("territories").getAsJsonObject();
-        for (Map.Entry<String, JsonElement> property : countriesJson.entrySet()) {
+        var root = parse(input).asObject();
+        var countriesJson = root.get("main").asObject().get(localeCode).asObject()
+                .get("localeDisplayNames").asObject().get("territories").asObject();
+        for (var property : countriesJson.entrySet()) {
             String country = property.getKey();
             if (availableCountries.contains(country)) {
-                locale.territories.put(country, property.getValue().getAsString());
+                locale.territories.put(country, property.getValue().asString());
             }
         }
     }
 
     private void readTimeZones(String localeCode, CLDRLocale locale, InputStream input) {
-        JsonObject root = (JsonObject) new JsonParser().parse(new InputStreamReader(input));
-        JsonObject zonesJson = root.get("main").getAsJsonObject().get(localeCode).getAsJsonObject()
-                .get("dates").getAsJsonObject().get("timeZoneNames").getAsJsonObject().get("zone")
-                .getAsJsonObject();
-        List<CLDRTimeZone> timeZones = new ArrayList<>();
-        for (Map.Entry<String, JsonElement> area : zonesJson.entrySet()) {
-            String areaName = area.getKey();
-            for (Map.Entry<String, JsonElement> location : area.getValue().getAsJsonObject().entrySet()) {
-                String locationName = location.getKey();
-                JsonElement city = location.getValue().getAsJsonObject().get("exemplarCity");
+        var root = parse(input).asObject();
+        var zonesJson = root.get("main").asObject().get(localeCode).asObject()
+                .get("dates").asObject().get("timeZoneNames").asObject().get("zone")
+                .asObject();
+        var timeZones = new ArrayList<CLDRTimeZone>();
+        for (var area : zonesJson.entrySet()) {
+            var areaName = area.getKey();
+            for (var location : area.getValue().asObject().entrySet()) {
+                var locationName = location.getKey();
+                var city = location.getValue().asObject().get("exemplarCity");
                 if (city != null) {
-                    CLDRTimeZone tz = new CLDRTimeZone(areaName, locationName, city.getAsString());
+                    var tz = new CLDRTimeZone(areaName, locationName, city.asString());
                     timeZones.add(tz);
                 } else {
-                    for (Map.Entry<String, JsonElement> sublocation : location.getValue()
-                            .getAsJsonObject().entrySet()) {
-                        city = location.getValue().getAsJsonObject().get("exemplarCity");
+                    for (var sublocation : location.getValue().asObject().entrySet()) {
+                        city = location.getValue().asObject().get("exemplarCity");
                         if (city != null) {
-                            CLDRTimeZone tz = new CLDRTimeZone(areaName, locationName + "/" + sublocation.getKey(),
-                                    city.getAsString());
+                            var tz = new CLDRTimeZone(areaName, locationName + "/" + sublocation.getKey(),
+                                    city.asString());
                             timeZones.add(tz);
                         }
                     }
@@ -212,156 +215,155 @@ public class CLDRReader {
     }
 
     private void readCurrencies(String localeCode, CLDRLocale locale, InputStream input) {
-        JsonObject root = (JsonObject) new JsonParser().parse(new InputStreamReader(input));
-        JsonObject currenciesJson = root.get("main").getAsJsonObject().get(localeCode).getAsJsonObject()
-                .get("numbers").getAsJsonObject().get("currencies").getAsJsonObject();
-        for (Map.Entry<String, JsonElement> currencyEntry : currenciesJson.entrySet()) {
-            String currencyCode = currencyEntry.getKey();
-            JsonObject currencyJson = currencyEntry.getValue().getAsJsonObject();
-            CLDRCurrency currency = new CLDRCurrency();
-            currency.name = currencyJson.get("displayName").getAsString();
+        var root = parse(input).asObject();
+        var currenciesJson = root.get("main").asObject().get(localeCode).asObject()
+                .get("numbers").asObject().get("currencies").asObject();
+        for (var currencyEntry : currenciesJson.entrySet()) {
+            var currencyCode = currencyEntry.getKey();
+            var currencyJson = currencyEntry.getValue().asObject();
+            var currency = new CLDRCurrency();
+            currency.name = currencyJson.get("displayName").asString();
             if (currencyJson.has("symbol")) {
-                currency.symbol = currencyJson.get("symbol").getAsString();
+                currency.symbol = currencyJson.get("symbol").asString();
             }
             locale.currencies.put(currencyCode, currency);
         }
     }
 
     private void readNumbers(String localeCode, CLDRLocale locale, InputStream input) {
-        JsonObject root = (JsonObject) new JsonParser().parse(new InputStreamReader(input));
-        JsonObject numbersJson = root.get("main").getAsJsonObject().get(localeCode).getAsJsonObject()
-                .get("numbers").getAsJsonObject();
-        String numbering = numbersJson.get("defaultNumberingSystem").getAsString();
-        JsonObject symbolsJson = numbersJson.get("symbols-numberSystem-" + numbering).getAsJsonObject();
-        locale.decimalData.decimalSeparator = symbolsJson.get("decimal").getAsString().charAt(0);
-        locale.decimalData.groupingSeparator = symbolsJson.get("group").getAsString().charAt(0);
-        locale.decimalData.listSeparator = symbolsJson.get("list").getAsString().charAt(0);
-        locale.decimalData.percent = symbolsJson.get("percentSign").getAsString().charAt(0);
-        locale.decimalData.minusSign = symbolsJson.get("minusSign").getAsString().charAt(0);
-        locale.decimalData.exponentSeparator = symbolsJson.get("exponential").getAsString();
-        locale.decimalData.perMille = symbolsJson.get("perMille").getAsString().charAt(0);
-        locale.decimalData.infinity = symbolsJson.get("infinity").getAsString();
-        locale.decimalData.nan = symbolsJson.get("nan").getAsString();
+        var root = parse(input).asObject();
+        var numbersJson = root.get("main").asObject().get(localeCode).asObject()
+                .get("numbers").asObject();
+        String numbering = numbersJson.get("defaultNumberingSystem").asString();
+        var symbolsJson = numbersJson.get("symbols-numberSystem-" + numbering).asObject();
+        locale.decimalData.decimalSeparator = symbolsJson.get("decimal").asString().charAt(0);
+        locale.decimalData.groupingSeparator = symbolsJson.get("group").asString().charAt(0);
+        locale.decimalData.listSeparator = symbolsJson.get("list").asString().charAt(0);
+        locale.decimalData.percent = symbolsJson.get("percentSign").asString().charAt(0);
+        locale.decimalData.minusSign = symbolsJson.get("minusSign").asString().charAt(0);
+        locale.decimalData.exponentSeparator = symbolsJson.get("exponential").asString();
+        locale.decimalData.perMille = symbolsJson.get("perMille").asString().charAt(0);
+        locale.decimalData.infinity = symbolsJson.get("infinity").asString();
+        locale.decimalData.nan = symbolsJson.get("nan").asString();
 
-        JsonObject numberJson = numbersJson.get("decimalFormats-numberSystem-" + numbering).getAsJsonObject();
-        locale.numberFormat = numberJson.get("standard").getAsString();
+        var numberJson = numbersJson.get("decimalFormats-numberSystem-" + numbering).asObject();
+        locale.numberFormat = numberJson.get("standard").asString();
 
-        JsonObject percentJson = numbersJson.get("percentFormats-numberSystem-" + numbering).getAsJsonObject();
-        locale.percentFormat = percentJson.get("standard").getAsString();
+        var percentJson = numbersJson.get("percentFormats-numberSystem-" + numbering).asObject();
+        locale.percentFormat = percentJson.get("standard").asString();
 
-        JsonObject currencyJson = numbersJson.get("currencyFormats-numberSystem-" + numbering).getAsJsonObject();
-        locale.currencyFormat = currencyJson.get("standard").getAsString();
+        var currencyJson = numbersJson.get("currencyFormats-numberSystem-" + numbering).asObject();
+        locale.currencyFormat = currencyJson.get("standard").asString();
     }
 
-    private void readEras(String localeCode, CLDRLocale locale, JsonObject root) {
-        JsonObject erasJson = root.get("main").getAsJsonObject().get(localeCode).getAsJsonObject()
-                .get("dates").getAsJsonObject().get("calendars").getAsJsonObject()
-                .get("gregorian").getAsJsonObject().get("eras").getAsJsonObject().get("eraAbbr").getAsJsonObject();
-        String bc = erasJson.get("0").getAsString();
-        String ac = erasJson.get("1").getAsString();
+    private void readEras(String localeCode, CLDRLocale locale, JsonObjectValue root) {
+        var erasJson = root.get("main").asObject().get(localeCode).asObject()
+                .get("dates").asObject().get("calendars").asObject()
+                .get("gregorian").asObject().get("eras").asObject().get("eraAbbr").asObject();
+        var bc = erasJson.get("0").asString();
+        var ac = erasJson.get("1").asString();
         locale.eras = new String[] { bc, ac };
     }
 
-    private void readAmPms(String localeCode, CLDRLocale locale, JsonObject root) {
-        JsonObject ampmJson = root.get("main").getAsJsonObject().get(localeCode).getAsJsonObject()
-                .get("dates").getAsJsonObject().get("calendars").getAsJsonObject()
-                .get("gregorian").getAsJsonObject().get("dayPeriods").getAsJsonObject()
-                .get("format").getAsJsonObject().get("abbreviated").getAsJsonObject();
-        String am = ampmJson.get("am").getAsString();
-        String pm = ampmJson.get("pm").getAsString();
+    private void readAmPms(String localeCode, CLDRLocale locale, JsonObjectValue root) {
+        var ampmJson = root.get("main").asObject().get(localeCode).asObject()
+                .get("dates").asObject().get("calendars").asObject()
+                .get("gregorian").asObject().get("dayPeriods").asObject()
+                .get("format").asObject().get("abbreviated").asObject();
+        String am = ampmJson.get("am").asString();
+        String pm = ampmJson.get("pm").asString();
         locale.dayPeriods = new String[] { am, pm };
     }
 
-    private void readMonths(String localeCode, CLDRLocale locale, JsonObject root) {
-        JsonObject monthsJson = root.get("main").getAsJsonObject().get(localeCode).getAsJsonObject()
-                .get("dates").getAsJsonObject().get("calendars").getAsJsonObject()
-                .get("gregorian").getAsJsonObject().get("months").getAsJsonObject()
-                .get("format").getAsJsonObject().get("wide").getAsJsonObject();
+    private void readMonths(String localeCode, CLDRLocale locale, JsonObjectValue root) {
+        var monthsJson = root.get("main").asObject().get(localeCode).asObject()
+                .get("dates").asObject().get("calendars").asObject()
+                .get("gregorian").asObject().get("months").asObject()
+                .get("format").asObject().get("wide").asObject();
         locale.months = new String[12];
         for (int i = 0; i < 12; ++i) {
-            locale.months[i] = monthsJson.get(String.valueOf(i + 1)).getAsString();
+            locale.months[i] = monthsJson.get(String.valueOf(i + 1)).asString();
         }
     }
 
-    private void readShortMonths(String localeCode, CLDRLocale locale, JsonObject root) {
-        JsonObject monthsJson = root.get("main").getAsJsonObject().get(localeCode).getAsJsonObject()
-                .get("dates").getAsJsonObject().get("calendars").getAsJsonObject()
-                .get("gregorian").getAsJsonObject().get("months").getAsJsonObject()
-                .get("format").getAsJsonObject().get("abbreviated").getAsJsonObject();
+    private void readShortMonths(String localeCode, CLDRLocale locale, JsonObjectValue root) {
+        var monthsJson = root.get("main").asObject().get(localeCode).asObject()
+                .get("dates").asObject().get("calendars").asObject()
+                .get("gregorian").asObject().get("months").asObject()
+                .get("format").asObject().get("abbreviated").asObject();
         locale.shortMonths = new String[12];
         for (int i = 0; i < 12; ++i) {
-            locale.shortMonths[i] = monthsJson.get(String.valueOf(i + 1)).getAsString();
+            locale.shortMonths[i] = monthsJson.get(String.valueOf(i + 1)).asString();
         }
     }
 
-    private void readWeekdays(String localeCode, CLDRLocale locale, JsonObject root) {
-        JsonObject weekdaysJson = root.get("main").getAsJsonObject().get(localeCode).getAsJsonObject()
-                .get("dates").getAsJsonObject().get("calendars").getAsJsonObject()
-                .get("gregorian").getAsJsonObject().get("days").getAsJsonObject()
-                .get("format").getAsJsonObject().get("wide").getAsJsonObject();
+    private void readWeekdays(String localeCode, CLDRLocale locale, JsonObjectValue root) {
+        var weekdaysJson = root.get("main").asObject().get(localeCode).asObject()
+                .get("dates").asObject().get("calendars").asObject()
+                .get("gregorian").asObject().get("days").asObject()
+                .get("format").asObject().get("wide").asObject();
         locale.weekdays = new String[7];
         for (int i = 0; i < 7; ++i) {
-            locale.weekdays[i] = weekdaysJson.get(weekdayKeys[i]).getAsString();
+            locale.weekdays[i] = weekdaysJson.get(weekdayKeys[i]).asString();
         }
     }
 
-    private void readShortWeekdays(String localeCode, CLDRLocale locale, JsonObject root) {
-        JsonObject weekdaysJson = root.get("main").getAsJsonObject().get(localeCode).getAsJsonObject()
-                .get("dates").getAsJsonObject().get("calendars").getAsJsonObject()
-                .get("gregorian").getAsJsonObject().get("days").getAsJsonObject()
-                .get("format").getAsJsonObject().get("abbreviated").getAsJsonObject();
+    private void readShortWeekdays(String localeCode, CLDRLocale locale, JsonObjectValue root) {
+        var weekdaysJson = root.get("main").asObject().get(localeCode).asObject()
+                .get("dates").asObject().get("calendars").asObject()
+                .get("gregorian").asObject().get("days").asObject()
+                .get("format").asObject().get("abbreviated").asObject();
         locale.shortWeekdays = new String[7];
         for (int i = 0; i < 7; ++i) {
-            locale.shortWeekdays[i] = weekdaysJson.get(weekdayKeys[i]).getAsString();
+            locale.shortWeekdays[i] = weekdaysJson.get(weekdayKeys[i]).asString();
         }
     }
 
-    private void readDateFormats(String localeCode, CLDRLocale locale, JsonObject root) {
-        JsonObject formatsJson = root.get("main").getAsJsonObject().get(localeCode).getAsJsonObject()
-                .get("dates").getAsJsonObject().get("calendars").getAsJsonObject()
-                .get("gregorian").getAsJsonObject().get("dateFormats").getAsJsonObject();
-        locale.dateFormats = new CLDRDateFormats(formatsJson.get("short").getAsString(),
-                formatsJson.get("medium").getAsString(), formatsJson.get("long").getAsString(),
-                formatsJson.get("full").getAsString());
+    private void readDateFormats(String localeCode, CLDRLocale locale, JsonObjectValue root) {
+        var formatsJson = root.get("main").asObject().get(localeCode).asObject()
+                .get("dates").asObject().get("calendars").asObject()
+                .get("gregorian").asObject().get("dateFormats").asObject();
+        locale.dateFormats = new CLDRDateFormats(formatsJson.get("short").asString(),
+                formatsJson.get("medium").asString(), formatsJson.get("long").asString(),
+                formatsJson.get("full").asString());
     }
 
-    private void readTimeFormats(String localeCode, CLDRLocale locale, JsonObject root) {
-        JsonObject formatsJson = root.get("main").getAsJsonObject().get(localeCode).getAsJsonObject()
-                .get("dates").getAsJsonObject().get("calendars").getAsJsonObject()
-                .get("gregorian").getAsJsonObject().get("timeFormats").getAsJsonObject();
-        locale.timeFormats = new CLDRDateFormats(formatsJson.get("short").getAsString(),
-                formatsJson.get("medium").getAsString(), formatsJson.get("long").getAsString(),
-                formatsJson.get("full").getAsString());
+    private void readTimeFormats(String localeCode, CLDRLocale locale, JsonObjectValue root) {
+        var formatsJson = root.get("main").asObject().get(localeCode).asObject()
+                .get("dates").asObject().get("calendars").asObject()
+                .get("gregorian").asObject().get("timeFormats").asObject();
+        locale.timeFormats = new CLDRDateFormats(formatsJson.get("short").asString(),
+                formatsJson.get("medium").asString(), formatsJson.get("long").asString(),
+                formatsJson.get("full").asString());
     }
 
-    private void readDateTimeFormats(String localeCode, CLDRLocale locale, JsonObject root) {
-        JsonObject formatsJson = root.get("main").getAsJsonObject().get(localeCode).getAsJsonObject()
-                .get("dates").getAsJsonObject().get("calendars").getAsJsonObject()
-                .get("gregorian").getAsJsonObject().get("dateTimeFormats").getAsJsonObject();
-        locale.dateTimeFormats = new CLDRDateFormats(formatsJson.get("short").getAsString(),
-                formatsJson.get("medium").getAsString(), formatsJson.get("long").getAsString(),
-                formatsJson.get("full").getAsString());
+    private void readDateTimeFormats(String localeCode, CLDRLocale locale, JsonObjectValue root) {
+        var formatsJson = root.get("main").asObject().get(localeCode).asObject()
+                .get("dates").asObject().get("calendars").asObject()
+                .get("gregorian").asObject().get("dateTimeFormats").asObject();
+        locale.dateTimeFormats = new CLDRDateFormats(formatsJson.get("short").asString(),
+                formatsJson.get("medium").asString(), formatsJson.get("long").asString(),
+                formatsJson.get("full").asString());
     }
 
     private void readWeekData(InputStream input) {
-        JsonObject root = (JsonObject) new JsonParser().parse(new InputStreamReader(input));
-        JsonObject weekJson = root.get("supplemental").getAsJsonObject().get("weekData").getAsJsonObject();
-        JsonObject minDaysJson = weekJson.get("minDays").getAsJsonObject();
-        for (Map.Entry<String, JsonElement> property : minDaysJson.entrySet()) {
-            minDaysMap.put(property.getKey(), property.getValue().getAsInt());
+        var root = parse(input).asObject();
+        var weekJson = root.get("supplemental").asObject().get("weekData").asObject();
+        var minDaysJson = weekJson.get("minDays").asObject();
+        for (var property : minDaysJson.entrySet()) {
+            minDaysMap.put(property.getKey(), Integer.parseInt(property.getValue().asString()));
         }
-        JsonObject firstDayJson = weekJson.get("firstDay").getAsJsonObject();
-        for (Map.Entry<String, JsonElement> property : firstDayJson.entrySet()) {
-            firstDayMap.put(property.getKey(), getNumericDay(property.getValue().getAsString()));
+        var firstDayJson = weekJson.get("firstDay").asObject();
+        for (var property : firstDayJson.entrySet()) {
+            firstDayMap.put(property.getKey(), getNumericDay(property.getValue().asString()));
         }
     }
 
     private void readLikelySubtags(InputStream input) {
-        JsonObject root = (JsonObject) new JsonParser().parse(new InputStreamReader(input));
-        JsonObject likelySubtagsJson = root.get("supplemental").getAsJsonObject().get("likelySubtags")
-                .getAsJsonObject();
-        for (Map.Entry<String, JsonElement> property : likelySubtagsJson.entrySet()) {
-            likelySubtags.put(property.getKey(), property.getValue().getAsString());
+        var root = parse(input).asObject();
+        var likelySubtagsJson = root.get("supplemental").asObject().get("likelySubtags").asObject();
+        for (var property : likelySubtagsJson.entrySet()) {
+            likelySubtags.put(property.getKey(), property.getValue().asString());
         }
     }
 
@@ -420,4 +422,21 @@ public class CLDRReader {
         ensureInitialized();
         return Collections.unmodifiableMap(likelySubtags);
     }
+
+    private JsonValue parse(InputStream input) {
+        var provider = new JsonValueProvider();
+        var visitor = JsonValueParserVisitor.create(provider);
+        parse(visitor, input);
+        return provider.getValue();
+    }
+
+    private void parse(JsonVisitor visitor, InputStream input) {
+        var consumer = new JsonVisitingConsumer(visitor);
+        var parser = new JsonParser(consumer);
+        try {
+            parser.parse(new InputStreamReader(input, StandardCharsets.UTF_8));
+        } catch (IOException e) {
+            throw new RuntimeException(e);
+        }
+    }
 }
diff --git a/classlib/src/main/java/org/teavm/classlib/impl/unicode/NumbersJsonParser.java b/classlib/src/main/java/org/teavm/classlib/impl/unicode/NumbersJsonParser.java
new file mode 100644
index 000000000..cd485ea09
--- /dev/null
+++ b/classlib/src/main/java/org/teavm/classlib/impl/unicode/NumbersJsonParser.java
@@ -0,0 +1,27 @@
+/*
+ *  Copyright 2023 Alexey Andreev.
+ *
+ *  Licensed under the Apache License, Version 2.0 (the "License");
+ *  you may not use this file except in compliance with the License.
+ *  You may obtain a copy of the License at
+ *
+ *       http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *  Unless required by applicable law or agreed to in writing, software
+ *  distributed under the License is distributed on an "AS IS" BASIS,
+ *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *  See the License for the specific language governing permissions and
+ *  limitations under the License.
+ */
+package org.teavm.classlib.impl.unicode;
+
+import org.teavm.common.json.JsonPropertyVisitor;
+
+class NumbersJsonParser extends JsonPropertyVisitor {
+    CLDRLocale locale;
+
+    NumbersJsonParser() {
+        super(true);
+
+    }
+}
diff --git a/core/src/main/java/org/teavm/backend/c/util/Deobfuscator.java b/core/src/main/java/org/teavm/backend/c/util/Deobfuscator.java
index 8b2d3c474..0fa067b5a 100644
--- a/core/src/main/java/org/teavm/backend/c/util/Deobfuscator.java
+++ b/core/src/main/java/org/teavm/backend/c/util/Deobfuscator.java
@@ -26,13 +26,13 @@ import java.util.ArrayList;
 import java.util.HashMap;
 import java.util.List;
 import java.util.Map;
-import org.teavm.backend.c.util.json.JsonAllErrorVisitor;
-import org.teavm.backend.c.util.json.JsonArrayVisitor;
-import org.teavm.backend.c.util.json.JsonErrorReporter;
-import org.teavm.backend.c.util.json.JsonParser;
-import org.teavm.backend.c.util.json.JsonPropertyVisitor;
-import org.teavm.backend.c.util.json.JsonVisitingConsumer;
-import org.teavm.backend.c.util.json.JsonVisitor;
+import org.teavm.common.json.JsonAllErrorVisitor;
+import org.teavm.common.json.JsonArrayVisitor;
+import org.teavm.common.json.JsonErrorReporter;
+import org.teavm.common.json.JsonParser;
+import org.teavm.common.json.JsonPropertyVisitor;
+import org.teavm.common.json.JsonVisitingConsumer;
+import org.teavm.common.json.JsonVisitor;
 
 public class Deobfuscator {
     private Map<Integer, CallSite> callSites = new HashMap<>();
diff --git a/core/src/main/java/org/teavm/backend/c/util/HeapDumpConverter.java b/core/src/main/java/org/teavm/backend/c/util/HeapDumpConverter.java
index 6e95694e7..0cd0b7cab 100644
--- a/core/src/main/java/org/teavm/backend/c/util/HeapDumpConverter.java
+++ b/core/src/main/java/org/teavm/backend/c/util/HeapDumpConverter.java
@@ -32,14 +32,14 @@ import java.util.Collection;
 import java.util.LinkedHashMap;
 import java.util.List;
 import java.util.Map;
-import org.teavm.backend.c.util.json.JsonAllErrorVisitor;
-import org.teavm.backend.c.util.json.JsonArrayVisitor;
-import org.teavm.backend.c.util.json.JsonErrorReporter;
-import org.teavm.backend.c.util.json.JsonObjectVisitor;
-import org.teavm.backend.c.util.json.JsonParser;
-import org.teavm.backend.c.util.json.JsonPropertyVisitor;
-import org.teavm.backend.c.util.json.JsonVisitingConsumer;
-import org.teavm.backend.c.util.json.JsonVisitor;
+import org.teavm.common.json.JsonAllErrorVisitor;
+import org.teavm.common.json.JsonArrayVisitor;
+import org.teavm.common.json.JsonErrorReporter;
+import org.teavm.common.json.JsonObjectVisitor;
+import org.teavm.common.json.JsonParser;
+import org.teavm.common.json.JsonPropertyVisitor;
+import org.teavm.common.json.JsonVisitingConsumer;
+import org.teavm.common.json.JsonVisitor;
 
 public final class HeapDumpConverter {
     private static byte[] buffer = new byte[8];
diff --git a/core/src/main/java/org/teavm/backend/c/util/json/JsonAllErrorVisitor.java b/core/src/main/java/org/teavm/common/json/JsonAllErrorVisitor.java
similarity index 95%
rename from core/src/main/java/org/teavm/backend/c/util/json/JsonAllErrorVisitor.java
rename to core/src/main/java/org/teavm/common/json/JsonAllErrorVisitor.java
index aabf87347..7468dffc2 100644
--- a/core/src/main/java/org/teavm/backend/c/util/json/JsonAllErrorVisitor.java
+++ b/core/src/main/java/org/teavm/common/json/JsonAllErrorVisitor.java
@@ -1,5 +1,5 @@
 /*
- *  Copyright 2019 Alexey Andreev.
+ *  Copyright 2023 Alexey Andreev.
  *
  *  Licensed under the Apache License, Version 2.0 (the "License");
  *  you may not use this file except in compliance with the License.
@@ -13,7 +13,7 @@
  *  See the License for the specific language governing permissions and
  *  limitations under the License.
  */
-package org.teavm.backend.c.util.json;
+package org.teavm.common.json;
 
 public class JsonAllErrorVisitor extends JsonVisitor {
     @Override
diff --git a/core/src/main/java/org/teavm/common/json/JsonArrayValue.java b/core/src/main/java/org/teavm/common/json/JsonArrayValue.java
new file mode 100644
index 000000000..50248981f
--- /dev/null
+++ b/core/src/main/java/org/teavm/common/json/JsonArrayValue.java
@@ -0,0 +1,35 @@
+/*
+ *  Copyright 2023 Alexey Andreev.
+ *
+ *  Licensed under the Apache License, Version 2.0 (the "License");
+ *  you may not use this file except in compliance with the License.
+ *  You may obtain a copy of the License at
+ *
+ *       http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *  Unless required by applicable law or agreed to in writing, software
+ *  distributed under the License is distributed on an "AS IS" BASIS,
+ *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *  See the License for the specific language governing permissions and
+ *  limitations under the License.
+ */
+package org.teavm.common.json;
+
+import java.util.ArrayList;
+import java.util.List;
+
+public class JsonArrayValue extends JsonValue {
+    private List<JsonValue> elements = new ArrayList<>();
+
+    public int size() {
+        return elements.size();
+    }
+
+    public JsonValue get(int index) {
+        return elements.get(index);
+    }
+
+    public void add(JsonValue element) {
+        elements.add(element);
+    }
+}
diff --git a/core/src/main/java/org/teavm/backend/c/util/json/JsonArrayVisitor.java b/core/src/main/java/org/teavm/common/json/JsonArrayVisitor.java
similarity index 92%
rename from core/src/main/java/org/teavm/backend/c/util/json/JsonArrayVisitor.java
rename to core/src/main/java/org/teavm/common/json/JsonArrayVisitor.java
index 0b556c057..a59ee8a15 100644
--- a/core/src/main/java/org/teavm/backend/c/util/json/JsonArrayVisitor.java
+++ b/core/src/main/java/org/teavm/common/json/JsonArrayVisitor.java
@@ -1,5 +1,5 @@
 /*
- *  Copyright 2019 Alexey Andreev.
+ *  Copyright 2023 Alexey Andreev.
  *
  *  Licensed under the Apache License, Version 2.0 (the "License");
  *  you may not use this file except in compliance with the License.
@@ -13,7 +13,7 @@
  *  See the License for the specific language governing permissions and
  *  limitations under the License.
  */
-package org.teavm.backend.c.util.json;
+package org.teavm.common.json;
 
 public class JsonArrayVisitor extends JsonAllErrorVisitor {
     private JsonVisitor itemVisitor;
diff --git a/core/src/main/java/org/teavm/common/json/JsonBooleanValue.java b/core/src/main/java/org/teavm/common/json/JsonBooleanValue.java
new file mode 100644
index 000000000..ae7207071
--- /dev/null
+++ b/core/src/main/java/org/teavm/common/json/JsonBooleanValue.java
@@ -0,0 +1,28 @@
+/*
+ *  Copyright 2023 Alexey Andreev.
+ *
+ *  Licensed under the Apache License, Version 2.0 (the "License");
+ *  you may not use this file except in compliance with the License.
+ *  You may obtain a copy of the License at
+ *
+ *       http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *  Unless required by applicable law or agreed to in writing, software
+ *  distributed under the License is distributed on an "AS IS" BASIS,
+ *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *  See the License for the specific language governing permissions and
+ *  limitations under the License.
+ */
+package org.teavm.common.json;
+
+public class JsonBooleanValue extends JsonValue {
+    private boolean innerValue;
+
+    public JsonBooleanValue(boolean value) {
+        this.innerValue = value;
+    }
+
+    public boolean asBoolean() {
+        return innerValue;
+    }
+}
diff --git a/core/src/main/java/org/teavm/backend/c/util/json/JsonConsumer.java b/core/src/main/java/org/teavm/common/json/JsonConsumer.java
similarity index 94%
rename from core/src/main/java/org/teavm/backend/c/util/json/JsonConsumer.java
rename to core/src/main/java/org/teavm/common/json/JsonConsumer.java
index 79f8e45c0..d71a08971 100644
--- a/core/src/main/java/org/teavm/backend/c/util/json/JsonConsumer.java
+++ b/core/src/main/java/org/teavm/common/json/JsonConsumer.java
@@ -1,5 +1,5 @@
 /*
- *  Copyright 2019 Alexey Andreev.
+ *  Copyright 2023 Alexey Andreev.
  *
  *  Licensed under the Apache License, Version 2.0 (the "License");
  *  you may not use this file except in compliance with the License.
@@ -13,7 +13,7 @@
  *  See the License for the specific language governing permissions and
  *  limitations under the License.
  */
-package org.teavm.backend.c.util.json;
+package org.teavm.common.json;
 
 public abstract class JsonConsumer {
     public void enterObject(JsonErrorReporter reporter) {
diff --git a/core/src/main/java/org/teavm/backend/c/util/json/JsonErrorReporter.java b/core/src/main/java/org/teavm/common/json/JsonErrorReporter.java
similarity index 90%
rename from core/src/main/java/org/teavm/backend/c/util/json/JsonErrorReporter.java
rename to core/src/main/java/org/teavm/common/json/JsonErrorReporter.java
index 5db7a283e..3478a0fe0 100644
--- a/core/src/main/java/org/teavm/backend/c/util/json/JsonErrorReporter.java
+++ b/core/src/main/java/org/teavm/common/json/JsonErrorReporter.java
@@ -1,5 +1,5 @@
 /*
- *  Copyright 2019 Alexey Andreev.
+ *  Copyright 2023 Alexey Andreev.
  *
  *  Licensed under the Apache License, Version 2.0 (the "License");
  *  you may not use this file except in compliance with the License.
@@ -13,7 +13,7 @@
  *  See the License for the specific language governing permissions and
  *  limitations under the License.
  */
-package org.teavm.backend.c.util.json;
+package org.teavm.common.json;
 
 public abstract class JsonErrorReporter {
     public abstract void error(String message);
diff --git a/core/src/main/java/org/teavm/common/json/JsonFloatValue.java b/core/src/main/java/org/teavm/common/json/JsonFloatValue.java
new file mode 100644
index 000000000..55dec8e93
--- /dev/null
+++ b/core/src/main/java/org/teavm/common/json/JsonFloatValue.java
@@ -0,0 +1,29 @@
+/*
+ *  Copyright 2023 Alexey Andreev.
+ *
+ *  Licensed under the Apache License, Version 2.0 (the "License");
+ *  you may not use this file except in compliance with the License.
+ *  You may obtain a copy of the License at
+ *
+ *       http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *  Unless required by applicable law or agreed to in writing, software
+ *  distributed under the License is distributed on an "AS IS" BASIS,
+ *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *  See the License for the specific language governing permissions and
+ *  limitations under the License.
+ */
+package org.teavm.common.json;
+
+public class JsonFloatValue extends JsonNumericValue {
+    private double number;
+
+    public JsonFloatValue(double number) {
+        this.number = number;
+    }
+
+    @Override
+    public double asNumber() {
+        return number;
+    }
+}
diff --git a/core/src/main/java/org/teavm/common/json/JsonIntValue.java b/core/src/main/java/org/teavm/common/json/JsonIntValue.java
new file mode 100644
index 000000000..8565ba0f2
--- /dev/null
+++ b/core/src/main/java/org/teavm/common/json/JsonIntValue.java
@@ -0,0 +1,34 @@
+/*
+ *  Copyright 2023 Alexey Andreev.
+ *
+ *  Licensed under the Apache License, Version 2.0 (the "License");
+ *  you may not use this file except in compliance with the License.
+ *  You may obtain a copy of the License at
+ *
+ *       http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *  Unless required by applicable law or agreed to in writing, software
+ *  distributed under the License is distributed on an "AS IS" BASIS,
+ *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *  See the License for the specific language governing permissions and
+ *  limitations under the License.
+ */
+package org.teavm.common.json;
+
+public class JsonIntValue extends JsonNumericValue {
+    private long number;
+
+    public JsonIntValue(long number) {
+        this.number = number;
+    }
+
+    @Override
+    public double asNumber() {
+        return number;
+    }
+
+    @Override
+    public long asIntNumber() {
+        return number;
+    }
+}
diff --git a/core/src/main/java/org/teavm/common/json/JsonNullValue.java b/core/src/main/java/org/teavm/common/json/JsonNullValue.java
new file mode 100644
index 000000000..0d575af4b
--- /dev/null
+++ b/core/src/main/java/org/teavm/common/json/JsonNullValue.java
@@ -0,0 +1,19 @@
+/*
+ *  Copyright 2023 Alexey Andreev.
+ *
+ *  Licensed under the Apache License, Version 2.0 (the "License");
+ *  you may not use this file except in compliance with the License.
+ *  You may obtain a copy of the License at
+ *
+ *       http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *  Unless required by applicable law or agreed to in writing, software
+ *  distributed under the License is distributed on an "AS IS" BASIS,
+ *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *  See the License for the specific language governing permissions and
+ *  limitations under the License.
+ */
+package org.teavm.common.json;
+
+public class JsonNullValue extends JsonValue {
+}
diff --git a/core/src/main/java/org/teavm/common/json/JsonNumericValue.java b/core/src/main/java/org/teavm/common/json/JsonNumericValue.java
new file mode 100644
index 000000000..3aef24903
--- /dev/null
+++ b/core/src/main/java/org/teavm/common/json/JsonNumericValue.java
@@ -0,0 +1,20 @@
+/*
+ *  Copyright 2023 Alexey Andreev.
+ *
+ *  Licensed under the Apache License, Version 2.0 (the "License");
+ *  you may not use this file except in compliance with the License.
+ *  You may obtain a copy of the License at
+ *
+ *       http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *  Unless required by applicable law or agreed to in writing, software
+ *  distributed under the License is distributed on an "AS IS" BASIS,
+ *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *  See the License for the specific language governing permissions and
+ *  limitations under the License.
+ */
+package org.teavm.common.json;
+
+public abstract class JsonNumericValue extends JsonValue {
+    public abstract double asNumber();
+}
diff --git a/core/src/main/java/org/teavm/common/json/JsonObjectValue.java b/core/src/main/java/org/teavm/common/json/JsonObjectValue.java
new file mode 100644
index 000000000..bd0481388
--- /dev/null
+++ b/core/src/main/java/org/teavm/common/json/JsonObjectValue.java
@@ -0,0 +1,45 @@
+/*
+ *  Copyright 2023 Alexey Andreev.
+ *
+ *  Licensed under the Apache License, Version 2.0 (the "License");
+ *  you may not use this file except in compliance with the License.
+ *  You may obtain a copy of the License at
+ *
+ *       http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *  Unless required by applicable law or agreed to in writing, software
+ *  distributed under the License is distributed on an "AS IS" BASIS,
+ *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *  See the License for the specific language governing permissions and
+ *  limitations under the License.
+ */
+package org.teavm.common.json;
+
+import java.util.HashMap;
+import java.util.Map;
+import java.util.Set;
+
+public class JsonObjectValue extends JsonValue {
+    private Map<String, JsonValue> properties = new HashMap<>();
+
+    public void put(String name, JsonValue value) {
+        properties.put(name, value);
+    }
+
+    public JsonValue get(String name) {
+        return properties.get(name);
+    }
+
+    public boolean has(String name) {
+        return properties.containsKey(name);
+    }
+
+    public Set<Map.Entry<String, JsonValue>> entrySet() {
+        return properties.entrySet();
+    }
+
+    @Override
+    public JsonObjectValue asObject() {
+        return this;
+    }
+}
diff --git a/core/src/main/java/org/teavm/backend/c/util/json/JsonObjectVisitor.java b/core/src/main/java/org/teavm/common/json/JsonObjectVisitor.java
similarity index 80%
rename from core/src/main/java/org/teavm/backend/c/util/json/JsonObjectVisitor.java
rename to core/src/main/java/org/teavm/common/json/JsonObjectVisitor.java
index 08a423a7c..20e016e78 100644
--- a/core/src/main/java/org/teavm/backend/c/util/json/JsonObjectVisitor.java
+++ b/core/src/main/java/org/teavm/common/json/JsonObjectVisitor.java
@@ -1,5 +1,5 @@
 /*
- *  Copyright 2019 Alexey Andreev.
+ *  Copyright 2023 Alexey Andreev.
  *
  *  Licensed under the Apache License, Version 2.0 (the "License");
  *  you may not use this file except in compliance with the License.
@@ -13,12 +13,12 @@
  *  See the License for the specific language governing permissions and
  *  limitations under the License.
  */
-package org.teavm.backend.c.util.json;
+package org.teavm.common.json;
 
 public class JsonObjectVisitor extends JsonVisitor {
-    private JsonPropertyVisitor propertyVisitor;
+    private JsonVisitor propertyVisitor;
 
-    public JsonObjectVisitor(JsonPropertyVisitor propertyVisitor) {
+    public JsonObjectVisitor(JsonVisitor propertyVisitor) {
         this.propertyVisitor = propertyVisitor;
     }
 
diff --git a/core/src/main/java/org/teavm/backend/c/util/json/JsonParser.java b/core/src/main/java/org/teavm/common/json/JsonParser.java
similarity index 99%
rename from core/src/main/java/org/teavm/backend/c/util/json/JsonParser.java
rename to core/src/main/java/org/teavm/common/json/JsonParser.java
index 7d3ded375..be3a3b3e4 100644
--- a/core/src/main/java/org/teavm/backend/c/util/json/JsonParser.java
+++ b/core/src/main/java/org/teavm/common/json/JsonParser.java
@@ -1,5 +1,5 @@
 /*
- *  Copyright 2019 Alexey Andreev.
+ *  Copyright 2023 Alexey Andreev.
  *
  *  Licensed under the Apache License, Version 2.0 (the "License");
  *  you may not use this file except in compliance with the License.
@@ -13,7 +13,7 @@
  *  See the License for the specific language governing permissions and
  *  limitations under the License.
  */
-package org.teavm.backend.c.util.json;
+package org.teavm.common.json;
 
 import java.io.IOException;
 import java.io.Reader;
diff --git a/core/src/main/java/org/teavm/backend/c/util/json/JsonPropertyVisitor.java b/core/src/main/java/org/teavm/common/json/JsonPropertyVisitor.java
similarity index 88%
rename from core/src/main/java/org/teavm/backend/c/util/json/JsonPropertyVisitor.java
rename to core/src/main/java/org/teavm/common/json/JsonPropertyVisitor.java
index 0dd9696e8..03b25b611 100644
--- a/core/src/main/java/org/teavm/backend/c/util/json/JsonPropertyVisitor.java
+++ b/core/src/main/java/org/teavm/common/json/JsonPropertyVisitor.java
@@ -1,5 +1,5 @@
 /*
- *  Copyright 2019 Alexey Andreev.
+ *  Copyright 2023 Alexey Andreev.
  *
  *  Licensed under the Apache License, Version 2.0 (the "License");
  *  you may not use this file except in compliance with the License.
@@ -13,7 +13,7 @@
  *  See the License for the specific language governing permissions and
  *  limitations under the License.
  */
-package org.teavm.backend.c.util.json;
+package org.teavm.common.json;
 
 import java.util.HashMap;
 import java.util.Map;
@@ -26,8 +26,9 @@ public class JsonPropertyVisitor extends JsonAllErrorVisitor {
         this.skipNonExistentProperties = skipNonExistentProperties;
     }
 
-    public void addProperty(String propertyName, JsonVisitor visitor) {
+    public JsonPropertyVisitor addProperty(String propertyName, JsonVisitor visitor) {
         properties.put(propertyName, visitor);
+        return this;
     }
 
     @Override
diff --git a/core/src/main/java/org/teavm/common/json/JsonStringValue.java b/core/src/main/java/org/teavm/common/json/JsonStringValue.java
new file mode 100644
index 000000000..0ebe808c6
--- /dev/null
+++ b/core/src/main/java/org/teavm/common/json/JsonStringValue.java
@@ -0,0 +1,29 @@
+/*
+ *  Copyright 2023 Alexey Andreev.
+ *
+ *  Licensed under the Apache License, Version 2.0 (the "License");
+ *  you may not use this file except in compliance with the License.
+ *  You may obtain a copy of the License at
+ *
+ *       http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *  Unless required by applicable law or agreed to in writing, software
+ *  distributed under the License is distributed on an "AS IS" BASIS,
+ *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *  See the License for the specific language governing permissions and
+ *  limitations under the License.
+ */
+package org.teavm.common.json;
+
+public class JsonStringValue extends JsonValue {
+    private String text;
+
+    public JsonStringValue(String text) {
+        this.text = text;
+    }
+
+    @Override
+    public String asString() {
+        return text;
+    }
+}
diff --git a/core/src/main/java/org/teavm/backend/c/util/json/JsonSyntaxException.java b/core/src/main/java/org/teavm/common/json/JsonSyntaxException.java
similarity index 94%
rename from core/src/main/java/org/teavm/backend/c/util/json/JsonSyntaxException.java
rename to core/src/main/java/org/teavm/common/json/JsonSyntaxException.java
index 2b093a50a..4ea7c63a3 100644
--- a/core/src/main/java/org/teavm/backend/c/util/json/JsonSyntaxException.java
+++ b/core/src/main/java/org/teavm/common/json/JsonSyntaxException.java
@@ -1,5 +1,5 @@
 /*
- *  Copyright 2019 Alexey Andreev.
+ *  Copyright 2023 Alexey Andreev.
  *
  *  Licensed under the Apache License, Version 2.0 (the "License");
  *  you may not use this file except in compliance with the License.
@@ -13,7 +13,7 @@
  *  See the License for the specific language governing permissions and
  *  limitations under the License.
  */
-package org.teavm.backend.c.util.json;
+package org.teavm.common.json;
 
 public class JsonSyntaxException extends RuntimeException {
     private final int lineNumber;
diff --git a/core/src/main/java/org/teavm/common/json/JsonValue.java b/core/src/main/java/org/teavm/common/json/JsonValue.java
new file mode 100644
index 000000000..c0f8cee9c
--- /dev/null
+++ b/core/src/main/java/org/teavm/common/json/JsonValue.java
@@ -0,0 +1,30 @@
+/*
+ *  Copyright 2023 Alexey Andreev.
+ *
+ *  Licensed under the Apache License, Version 2.0 (the "License");
+ *  you may not use this file except in compliance with the License.
+ *  You may obtain a copy of the License at
+ *
+ *       http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *  Unless required by applicable law or agreed to in writing, software
+ *  distributed under the License is distributed on an "AS IS" BASIS,
+ *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *  See the License for the specific language governing permissions and
+ *  limitations under the License.
+ */
+package org.teavm.common.json;
+
+public abstract class JsonValue {
+    public JsonObjectValue asObject() {
+        throw new IllegalStateException();
+    }
+
+    public String asString() {
+        throw new IllegalStateException();
+    }
+
+    public long asIntNumber() {
+        throw new IllegalStateException();
+    }
+}
diff --git a/core/src/main/java/org/teavm/common/json/JsonValueParserVisitor.java b/core/src/main/java/org/teavm/common/json/JsonValueParserVisitor.java
new file mode 100644
index 000000000..344fc71df
--- /dev/null
+++ b/core/src/main/java/org/teavm/common/json/JsonValueParserVisitor.java
@@ -0,0 +1,90 @@
+/*
+ *  Copyright 2023 Alexey Andreev.
+ *
+ *  Licensed under the Apache License, Version 2.0 (the "License");
+ *  you may not use this file except in compliance with the License.
+ *  You may obtain a copy of the License at
+ *
+ *       http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *  Unless required by applicable law or agreed to in writing, software
+ *  distributed under the License is distributed on an "AS IS" BASIS,
+ *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *  See the License for the specific language governing permissions and
+ *  limitations under the License.
+ */
+package org.teavm.common.json;
+
+import java.util.function.Consumer;
+
+public abstract class JsonValueParserVisitor extends JsonAllErrorVisitor {
+    public abstract void consume(JsonValue value);
+
+    public static JsonValueParserVisitor create(Consumer<JsonValue> consumer) {
+        return new JsonValueParserVisitor() {
+            @Override
+            public void consume(JsonValue value) {
+                consumer.accept(value);
+            }
+        };
+    }
+
+    @Override
+    public JsonVisitor object(JsonErrorReporter reporter) {
+        var jsonObject = new JsonObjectValue();
+        consume(jsonObject);
+        return new JsonAllErrorVisitor() {
+            @Override
+            public JsonVisitor property(JsonErrorReporter reporter, String name) {
+                return new JsonValueParserVisitor() {
+                    @Override
+                    public void consume(JsonValue value) {
+                        jsonObject.put(name, value);
+                    }
+                };
+            }
+        };
+    }
+
+    @Override
+    public JsonVisitor array(JsonErrorReporter reporter) {
+        var jsonArray = new JsonArrayValue();
+        consume(jsonArray);
+        return new JsonAllErrorVisitor() {
+            @Override
+            public JsonVisitor array(JsonErrorReporter reporter) {
+                return new JsonValueParserVisitor() {
+                    @Override
+                    public void consume(JsonValue value) {
+                        jsonArray.add(value);
+                    }
+                };
+            }
+        };
+    }
+
+    @Override
+    public void stringValue(JsonErrorReporter reporter, String value) {
+        consume(new JsonStringValue(value));
+    }
+
+    @Override
+    public void intValue(JsonErrorReporter reporter, long value) {
+        consume(new JsonIntValue(value));
+    }
+
+    @Override
+    public void floatValue(JsonErrorReporter reporter, double value) {
+        consume(new JsonFloatValue(value));
+    }
+
+    @Override
+    public void nullValue(JsonErrorReporter reporter) {
+        consume(new JsonNullValue());
+    }
+
+    @Override
+    public void booleanValue(JsonErrorReporter reporter, boolean value) {
+        consume(new JsonBooleanValue(value));
+    }
+}
diff --git a/core/src/main/java/org/teavm/common/json/JsonValueProvider.java b/core/src/main/java/org/teavm/common/json/JsonValueProvider.java
new file mode 100644
index 000000000..d20b91251
--- /dev/null
+++ b/core/src/main/java/org/teavm/common/json/JsonValueProvider.java
@@ -0,0 +1,31 @@
+/*
+ *  Copyright 2023 Alexey Andreev.
+ *
+ *  Licensed under the Apache License, Version 2.0 (the "License");
+ *  you may not use this file except in compliance with the License.
+ *  You may obtain a copy of the License at
+ *
+ *       http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *  Unless required by applicable law or agreed to in writing, software
+ *  distributed under the License is distributed on an "AS IS" BASIS,
+ *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *  See the License for the specific language governing permissions and
+ *  limitations under the License.
+ */
+package org.teavm.common.json;
+
+import java.util.function.Consumer;
+
+public class JsonValueProvider implements Consumer<JsonValue> {
+    private JsonValue value;
+
+    public JsonValue getValue() {
+        return value;
+    }
+
+    @Override
+    public void accept(JsonValue jsonValue) {
+        value = jsonValue;
+    }
+}
diff --git a/core/src/main/java/org/teavm/backend/c/util/json/JsonVisitingConsumer.java b/core/src/main/java/org/teavm/common/json/JsonVisitingConsumer.java
similarity index 98%
rename from core/src/main/java/org/teavm/backend/c/util/json/JsonVisitingConsumer.java
rename to core/src/main/java/org/teavm/common/json/JsonVisitingConsumer.java
index 3189de26c..85b4b533a 100644
--- a/core/src/main/java/org/teavm/backend/c/util/json/JsonVisitingConsumer.java
+++ b/core/src/main/java/org/teavm/common/json/JsonVisitingConsumer.java
@@ -1,5 +1,5 @@
 /*
- *  Copyright 2019 Alexey Andreev.
+ *  Copyright 2023 Alexey Andreev.
  *
  *  Licensed under the Apache License, Version 2.0 (the "License");
  *  you may not use this file except in compliance with the License.
@@ -13,7 +13,7 @@
  *  See the License for the specific language governing permissions and
  *  limitations under the License.
  */
-package org.teavm.backend.c.util.json;
+package org.teavm.common.json;
 
 import java.util.ArrayDeque;
 import java.util.Deque;
diff --git a/core/src/main/java/org/teavm/backend/c/util/json/JsonVisitor.java b/core/src/main/java/org/teavm/common/json/JsonVisitor.java
similarity index 94%
rename from core/src/main/java/org/teavm/backend/c/util/json/JsonVisitor.java
rename to core/src/main/java/org/teavm/common/json/JsonVisitor.java
index 87c825565..4b27f8995 100644
--- a/core/src/main/java/org/teavm/backend/c/util/json/JsonVisitor.java
+++ b/core/src/main/java/org/teavm/common/json/JsonVisitor.java
@@ -1,5 +1,5 @@
 /*
- *  Copyright 2019 Alexey Andreev.
+ *  Copyright 2023 Alexey Andreev.
  *
  *  Licensed under the Apache License, Version 2.0 (the "License");
  *  you may not use this file except in compliance with the License.
@@ -13,7 +13,7 @@
  *  See the License for the specific language governing permissions and
  *  limitations under the License.
  */
-package org.teavm.backend.c.util.json;
+package org.teavm.common.json;
 
 public abstract class JsonVisitor {
     public JsonVisitor object(JsonErrorReporter reporter) {
diff --git a/gradle/libs.versions.toml b/gradle/libs.versions.toml
index 8475cfc85..d2e1a4ef4 100644
--- a/gradle/libs.versions.toml
+++ b/gradle/libs.versions.toml
@@ -30,7 +30,6 @@ asm-analysis = { module = "org.ow2.asm:asm-analysis", version.ref = "asm" }
 jackson-annotations = { module = "com.fasterxml.jackson.core:jackson-annotations", version.ref = "jackson" }
 jackson-databind =  { module = "com.fasterxml.jackson.core:jackson-databind", version.ref = "jackson" }
 
-gson = "com.google.code.gson:gson:2.10.1"
 jzlib = "com.jcraft:jzlib:1.1.3"
 jodaTime = "joda-time:joda-time:2.12.2"
 htmlunit = "net.sourceforge.htmlunit:htmlunit:2.70.0"