JSON tools
Convert JSON to YAML, CSV, XML or code, generate types and schemas, format, validate and diff — every JSON tool runs 100% in your browser.
Data format converters
- JSON to YAML Converter — Free Online Tool Convert JSON to clean YAML instantly in your browser. Free, private and offline-friendly: your data never leaves your device.
- YAML to JSON Converter — Free Online Tool Convert YAML to clean, indented JSON instantly in your browser. Free, private and offline-friendly: your data never leaves your device.
- JSON to CSV Converter — Free Online Tool Convert a JSON array to CSV instantly in your browser. Free, private and offline-friendly: your data never leaves your device.
- CSV to JSON Converter — Free Online Tool Convert CSV to JSON instantly in your browser. Free, private and offline-friendly: your spreadsheet data never leaves your device.
- JSON to XML Converter — Free Online Tool Convert JSON to indented XML instantly in your browser. Free, private and offline-friendly: your data never leaves your device.
- XML to JSON Converter — Free Online Tool Convert XML to JSON instantly in your browser. Free, private and offline-friendly: your documents never leave your device.
- JSON to TOML Converter — Free Online Tool Convert JSON to TOML instantly in your browser. Free, private and offline-friendly: your data never leaves your device.
- TOML to JSON Converter — Free Online Tool Convert TOML to JSON instantly in your browser. Free, private and offline-friendly: your config files never leave your device.
- JSON to TSV Converter — Free Online Tool Convert a JSON array of objects to tab-separated values instantly in your browser. Free and private: your data never leaves your device.
- TSV to JSON Converter — Free Online Tool Convert tab-separated values to a JSON array of objects instantly in your browser. Free and private: your data never leaves your device.
- JSON to NDJSON Converter — Free Online Tool Convert a JSON array to newline-delimited JSON (JSON Lines) instantly in your browser. Free and private: your data never leaves your device.
- NDJSON to JSON Converter — Free Online Tool Convert newline-delimited JSON (JSON Lines) to a formatted JSON array, in your browser. Free and private: your data never leaves your device.
- ENV to JSON Converter — Parse .env Files Online Convert .env files to a JSON object instantly in your browser. Quotes, comments and export prefixes handled. Free and private: nothing is uploaded.
- JSON to ENV Converter — Generate .env Files Online Convert a flat JSON object to .env KEY=value lines instantly in your browser. Free, private and offline-friendly: your data never leaves your device.
JSON to code generators
- JSON to TypeScript Converter — Free Online Tool Convert JSON to TypeScript interfaces instantly in your browser. Free, private and offline-friendly: your data never leaves your device.
- JSON to Python (Pydantic) Converter — Free Tool Generate Pydantic models from JSON instantly in your browser. Free and private: your data never leaves your device.
- JSON to Go Struct Converter — Free Online Tool Generate Go structs from JSON instantly in your browser. Free and private: your data never leaves your device.
- JSON to Rust Struct Converter — Serde, Free Tool Generate Rust serde structs from JSON instantly in your browser. Free and private: your data never leaves your device.
- JSON to Java Record Converter — Free Online Tool Convert JSON to Java records (Java 16+) instantly in your browser. Free, private and offline-friendly: your data never leaves your device.
- JSON to C# Class Converter — Free Online Tool Convert JSON to C# records or classes with System.Text.Json attributes, instantly in your browser. Free, private: your data never leaves your device.
- JSON to Kotlin Data Class Converter — Free Online Tool Convert JSON to Kotlin data classes instantly in your browser. Free, private and offline-friendly: your data never leaves your device.
- JSON to Swift Codable Structs — Free Online Tool Generate Swift Codable structs from sample JSON instantly in your browser. Free, private and offline-friendly: your data never leaves your device.
- JSON to Dart Class Converter — Free Online Tool Convert JSON to null-safe Dart classes with fromJson and toJson, right in your browser. Free and private: your data never leaves your device.
- JSON to PHP Class Converter — Free Online Tool Convert JSON to typed PHP 8 classes with constructor property promotion, in your browser. Free and private: your data never leaves your device.
- JSON to Scala Case Class Converter — Free Online Tool Convert JSON to Scala case classes instantly in your browser. Free, private and offline-friendly: your data never leaves your device.
- JSON to Zod Schema Converter — Free Online Tool Generate Zod v4 schemas from sample JSON instantly in your browser. Free, private and offline-friendly: your data never leaves your device.
- JSON to JSON Schema Converter — Free Online Tool Generate a JSON Schema (draft 2020-12) from sample JSON in your browser. Free, private and offline-friendly: your data never leaves your device.
- JSON to GraphQL Schema Converter — Free Online Tool Generate GraphQL SDL types from sample JSON instantly in your browser. Free, private and offline-friendly: your data never leaves your device.
- JSON to io-ts Codec Converter — Free Online Tool Generate io-ts codecs from sample JSON instantly in your browser. Free, private and offline-friendly: your data never leaves your device.
- JSON to Flow Types Converter — Free Online Tool Convert JSON to Flow type definitions instantly in your browser. Free, private and offline-friendly: your data never leaves your device.
- JSON to React PropTypes Converter — Free Online Tool Convert JSON to React PropTypes instantly in your browser. Free, private and offline-friendly: your data never leaves your device.
- JSON to JSDoc Typedef Converter — Free Online Tool Convert JSON to JSDoc @typedef blocks instantly in your browser. Free, private and offline-friendly: your data never leaves your device.
JSON to database schemas
- JSON to MySQL CREATE TABLE Converter — Free Online Tool Generate a MySQL CREATE TABLE statement from sample JSON in your browser. Free, private and offline-friendly: your data never leaves your device.
- JSON to PostgreSQL CREATE TABLE — Free Online Tool Generate a PostgreSQL CREATE TABLE statement from sample JSON in your browser. Free, private and offline-friendly: your data never leaves your device.
- JSON to Mongoose Schema Converter — Free Online Tool Generate Mongoose schemas from sample JSON instantly in your browser. Free, private and offline-friendly: your data never leaves your device.
- JSON to Prisma Schema Model — Free Online Tool Generate a Prisma schema model from sample JSON instantly in your browser. Free, private and offline-friendly: your data never leaves your device.
- JSON to BigQuery Schema Converter — Free Online Tool Generate a BigQuery table schema from sample JSON instantly in your browser. Free and private: your data never leaves your device.
- JSON to Protobuf (proto3) Converter — Free Online Tool Convert JSON to proto3 message definitions instantly in your browser. Free, private and offline-friendly: your data never leaves your device.
Formatters, validators & diff
- JSON Formatter & Beautifier — Free Online Tool Format, beautify or minify JSON instantly in your browser, with 2 or 4 spaces and key sorting. Free and private: your data never leaves your device.
- JSON Validator — Check JSON Syntax Online for Free Validate JSON syntax instantly in your browser, with line and column on errors. Free, private and offline-friendly: your data never leaves your device.
- JSON Diff — Compare Two JSON Files Online Compare two JSON documents and see the differences as a unified diff. Key order and indentation are ignored. Free, private, right in your browser.
Encoding & decoding
- JWT to JSON Decoder — Free Online Tool Decode a JWT header and payload to JSON instantly in your browser. Free and private: the token is never sent and stays on your device.
- Query String to JSON Converter — Free Online Tool Convert a URL query string into JSON instantly in your browser. Free, private and offline-friendly: your data never leaves your device.
- JSON to Query String Converter — Free Online Tool Convert a flat JSON object into a URL query string in your browser. Free, private and offline-friendly: your data never leaves your device.