JSON Formatter
Format JSON online: beautify messy JSON with 2 or 4 spaces or tabs, sort keys, minify it to one line and find errors. Free, runs in your browser.
Generate C# classes or records from JSON with JsonPropertyName or JsonProperty attributes, for .NET, Unity and Xamarin.
Runs in your browser. Your data never leaves your device.
Convert a JSON sample into C# classes with PascalCase properties. Add [JsonPropertyName] for System.Text.Json or [JsonProperty] for Newtonsoft.Json so the JSON keys still match, and choose classes or records.
Use JsonPropertyName with System.Text.Json (built into .NET) and JsonProperty with Newtonsoft.Json.
Format JSON online: beautify messy JSON with 2 or 4 spaces or tabs, sort keys, minify it to one line and find errors. Free, runs in your browser.
Check if JSON is valid and see the exact line and column of any error, with a hint on how to fix it. A free online JSON validator in your browser.
Paste JSON and get Kotlin data classes for Android, with kotlinx.serialization, Gson or Moshi names, nullable fields and defaults. Free, in your browser.
Convert JSON to null-safe Dart model classes for Flutter, with fromJson, toJson and an optional copyWith. Free, no sign-up, runs in your browser.