JSON Tools
JSON (JavaScript Object Notation) is the universal data interchange format. Format and validate JSON, convert it to YAML, XML, CSV and SQL, generate TypeScript/Java/Python/Go/Rust interfaces from any JSON document, test JSONPath expressions, diff two JSON objects and generate Zod schemas — all in the browser.
51 tools
JSON Formatter
Format and pretty-print JSON online. Instant beautification with syntax highlighting.
JSON Minifier
Minify JSON data by removing whitespace — compact output ready for production.
JSON to YAML Converter
Convert JSON to YAML instantly in your browser. Paste any JSON object or nested structure and get clean, readable YAML output. Swap to YAML→JSON in one click.
YAML to JSON Converter
Convert YAML to JSON instantly in your browser. Supports Kubernetes manifests, GitHub Actions, Docker Compose and any YAML document. Swap to JSON→YAML in one click.
JSON to XML Converter
Convert JSON to XML instantly in your browser. Handles nested objects, arrays and all JSON types. Bidirectional — swap to XML→JSON in one click.
XML to JSON Converter
Convert XML to JSON instantly in your browser. Supports nested elements, attributes and CDATA. Bidirectional — swap to JSON→XML in one click.
JSON to TOML Converter
Convert JSON to TOML configuration format instantly in your browser. Ideal for Cargo.toml, pyproject.toml and Helm values. Bidirectional — swap to TOML→JSON.
TOML to JSON Converter
Convert TOML configuration files to JSON instantly in your browser. Supports all TOML types including arrays of tables. Bidirectional — swap to JSON→TOML.
ENV to JSON Converter
Convert .env files to JSON instantly in your browser. Parses KEY=VALUE pairs, strips comments, handles quoted values. Swap to JSON→ENV in one click.
JSON to ENV Converter
Convert JSON objects to .env file format instantly in your browser. Swap to ENV→JSON in one click.
NDJSON to JSON Converter
Convert Newline-Delimited JSON (NDJSON) to a JSON array instantly in your browser. Useful for log files and streaming APIs. Swap to JSON→NDJSON in one click.
JSON to NDJSON Converter
Convert a JSON array to Newline-Delimited JSON (NDJSON/JSONL) instantly in your browser. Ideal for log pipelines and streaming imports. Swap to NDJSON→JSON in one click.
JSON to TypeScript Converter
Generate TypeScript interfaces from any JSON object instantly in your browser. Handles nested objects, arrays and all JSON types.
JSON to Python Converter
Generate Python dataclasses from JSON in your browser. Handles nested objects, arrays, and optional fields.
JSON to C# Converter
Generate C# classes from JSON in your browser. Produces clean POCO classes with proper types.
JSON to Go Converter
Generate Go structs from JSON in your browser. Handles nested types and json tags.
JSON to Rust Converter
Generate Rust structs with serde attributes from JSON in your browser.
JSON to Kotlin Converter
Generate Kotlin data classes from JSON in your browser. Handles nested objects and nullable types.
JSON to Java Converter
Generate Java classes from JSON in your browser. Produces clean POJOs ready for Jackson or Gson.
JSON to Swift Converter
Generate Swift structs conforming to Codable from JSON in your browser.
JSON to Dart Converter
Generate Dart classes from JSON in your browser. Compatible with Flutter and json_serializable.
JSON to CSV Converter
Convert a JSON array to CSV instantly in your browser. Validates flat structure and shows a table preview. Swap to CSV→JSON in one click.
CSV to JSON Converter
Convert CSV data to a JSON array instantly in your browser. Auto-detects headers and casts types. Swap to JSON→CSV in one click.
Query String to JSON Converter
Convert a URL query string to a JSON object instantly in your browser. Handles arrays and encoded characters. Swap to JSON→Query String in one click.
JSON to Query String Converter
Convert a JSON object to a URL query string instantly in your browser. Swap to Query String→JSON in one click.
JSON to SQL Converter
Convert a JSON array of objects to SQL INSERT statements instantly in your browser. Detects column types automatically.
JSON to HTML Table Converter
Convert a JSON array of objects to an HTML table instantly in your browser. Copy or download the ready-to-use HTML.
JSON to Ruby Converter
Generate Ruby Struct / class definitions from a JSON sample. Uses Quicktype for accurate type inference.
JSON to PHP Converter
Generate PHP class definitions from a JSON sample. Uses Quicktype for accurate type inference.
JSON to Zod Schema Converter
Generate a Zod validation schema from a JSON object or array. Handles nested objects and arrays with inferred types.
JSON to GraphQL Type Converter
Generate GraphQL type definitions from a JSON sample. Infers field types including nested objects and lists.
JSON to Protobuf Converter
Generate Protocol Buffer (proto3) message definitions from a JSON sample. Infers field types with proper field numbering.
JSON to Elixir Struct Converter
Generate Elixir defstruct and @type definitions from a JSON sample. Handles nested objects recursively.
JSON to Mongoose Schema Converter
Generate a Mongoose schema from a JSON object. Infers field types and creates a model export ready for Node.js.
JSON to Prisma Schema Converter
Generate a Prisma model definition from a JSON object. Infers field types and adds id / DateTime hints automatically.
JSON to INI Converter
Convert a JSON object to an INI configuration file format. Supports sections and flat key=value pairs.
INI to JSON Converter
Convert an INI configuration file to JSON. Parses sections, keys, and values with type coercion.
JSON to Base64 Converter
Encode a JSON object as a Base64 string. Useful for embedding JSON in URLs or HTTP headers.
Base64 to JSON Converter
Decode a Base64 string back to a formatted JSON object. Validates the result is valid JSON.
HTML Table Converter
Convert between JSON, CSV, XML, SQL and HTML tables — in both directions
SQL INSERT Converter
Convert SQL INSERT statements to JSON, CSV, XML, YAML and HTML
Excel Converter
Convert Excel spreadsheets (.xlsx/.xls) to CSV, JSON, HTML, SQL and view formulas
JSON Visualizer
Visualize JSON as an interactive graph or UML class diagram with code export
JSON → Graph
Visualize any JSON as an interactive node-link graph
JSON → UML
Visualize JSON as a UML class diagram with language-aware types
Code Validator
Validate JSON, YAML, XML, JavaScript and CSS syntax with detailed error messages
String Escape / Unescape
Escape and unescape strings for JSON, HTML, backslash sequences, and Unicode
JSONPath Tester
Test and evaluate JSONPath expressions against JSON data
jq Playground
Test jq filter expressions on JSON data interactively with live output and example filters
JSON Schema
Generate a JSON Schema (draft-07) from any JSON, then validate JSON documents against a schema with detailed error paths
JSON Diff
Semantically compare two JSON documents — see added, removed and changed fields with full key paths
About JSON Tools
JSON (JavaScript Object Notation) is the universal data interchange format. Format and validate JSON, convert it to YAML, XML, CSV and SQL, generate TypeScript/Java/Python/Go/Rust interfaces from any JSON document, test JSONPath expressions, diff two JSON objects and generate Zod schemas — all in the browser.
Common Use Cases
- Format and validate API response bodies
- Convert JSON to YAML for Kubernetes config
- Generate TypeScript interfaces from JSON models
- Diff two JSON objects to find structural changes
- Build JSONPath queries for data extraction
Frequently Asked Questions
QAre these JSON tools free?
Yes — all 51 JSON tools are completely free with no account, no subscription and no paywalls. All processing runs entirely in your browser.
QDoes my data get sent to a server?
No. Every JSON tool processes data entirely in your browser using JavaScript and WebAssembly. Nothing you paste, type or import is transmitted to any server.
QHow many JSON tools are available?
There are currently 51 JSON tools available. Browse them all on this page or use the search bar to find a specific tool.
QDo the tools work offline?
Most tools work offline once the page has loaded, since all processing is client-side. A small number of tools that fetch external assets may require an initial network connection.
See Also
- JSON FormatterFormat and pretty-print JSON online. Instant beautification with syntax highlighting.
- JSON MinifierMinify JSON data by removing whitespace — compact output ready for production.
- JSON to YAML ConverterConvert JSON to YAML instantly in your browser. Paste any JSON object or nested structure and get clean, readable YAML output. Swap to YAML→JSON in one click.
- YAML to JSON ConverterConvert YAML to JSON instantly in your browser. Supports Kubernetes manifests, GitHub Actions, Docker Compose and any YAML document. Swap to JSON→YAML in one click.
- JSON to XML ConverterConvert JSON to XML instantly in your browser. Handles nested objects, arrays and all JSON types. Bidirectional — swap to XML→JSON in one click.
- XML to JSON ConverterConvert XML to JSON instantly in your browser. Supports nested elements, attributes and CDATA. Bidirectional — swap to JSON→XML in one click.
- JSON to TOML ConverterConvert JSON to TOML configuration format instantly in your browser. Ideal for Cargo.toml, pyproject.toml and Helm values. Bidirectional — swap to TOML→JSON.
- TOML to JSON ConverterConvert TOML configuration files to JSON instantly in your browser. Supports all TOML types including arrays of tables. Bidirectional — swap to JSON→TOML.
- ENV to JSON ConverterConvert .env files to JSON instantly in your browser. Parses KEY=VALUE pairs, strips comments, handles quoted values. Swap to JSON→ENV in one click.
- JSON to ENV ConverterConvert JSON objects to .env file format instantly in your browser. Swap to ENV→JSON in one click.
- NDJSON to JSON ConverterConvert Newline-Delimited JSON (NDJSON) to a JSON array instantly in your browser. Useful for log files and streaming APIs. Swap to JSON→NDJSON in one click.
- JSON to NDJSON ConverterConvert a JSON array to Newline-Delimited JSON (NDJSON/JSONL) instantly in your browser. Ideal for log pipelines and streaming imports. Swap to NDJSON→JSON in one click.