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Format, validate, minify & convert JSON online. JSON (RFC 8259) is the de facto data interchange format. This comprehensive tool formats messy JSON for readability, validates syntax, minifies for production, and converts to YAML, XML, CSV, Java, Go, Protocol Buffers and JSON Schema — all in your browser, 100% private.
Format minified or hard-to-read JSON into clean, indented output; validate against the spec; minify for smaller payloads; or convert to a dozen other formats without leaving your editor. 100% free, no registration, and complete privacy — everything runs locally in your browser, so your data never touches a server.
Beautify minified or messy JSON with proper indentation and consistent spacing instantly.
Check syntax against RFC 8259, pinpoint errors with precise line numbers, and fix problems before they break code.
Export JSON to YAML, XML, CSV, TOML, Java classes, Go structs, Protocol Buffers, JSON Schema, and more.
Strip comments and whitespace to shrink payloads and improve download speed without changing behavior.
Format minified JSON and convert to YAML
Input (minified, hard to read):
{"user":{"id":123,"name":"Alice","email":"[email protected]","tags":["admin","moderator"],"created":"2024-01-15T10:30:00Z"}}Output:
{
"user": {
"id": 123,
"name": "Alice",
"email": "[email protected]",
"tags": ["admin", "moderator"],
"created": "2024-01-15T10:30:00Z"
}
}JSON (JavaScript Object Notation) is a lightweight, language-independent data format defined in RFC 8259. It uses key-value pairs (objects), arrays, and primitive values (strings, numbers, booleans, null) and is universally supported by web APIs, databases, and applications.
Formatted JSON is readable and diff-friendly, making it easier to review, debug, and version control. Minified JSON is smaller and faster to transmit. This tool lets you switch between both forms and validate the result conforms to the spec.
JSON is more compact and is a subset of JavaScript; XML is more verbose but offers attributes and namespaces. For web APIs and config, JSON is preferred. Use this tool to convert JSON to XML and vice versa when you need to work across both formats.
Yes. Paste your JSON and select 'JSON to Java' or 'JSON to Golang' to auto-generate strongly-typed classes or structs. The generated code reflects your JSON structure and is ready to use in your project.
No. All formatting, validation, conversion, and minification runs entirely in your browser using JavaScript. Your data never leaves your device.
This tool strictly validates against RFC 8259 (standard JSON). JSON5 (which allows trailing commas, comments, etc.) is not supported here; use a dedicated JSON5 tool if you need that syntax.
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