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JSON Formatter & Validator
Paste raw JSON to format it with proper indentation, validate for errors, and minify for production. Runs entirely in your browser — your data never leaves your device.
Indent:
Formatted output appears hereWhat is JSON formatting?
JSON (JavaScript Object Notation) is the universal data exchange format for APIs and web applications. Formatting adds proper indentation to make nested structures readable. Minifying removes whitespace to reduce file size. Validation checks that the JSON is syntactically correct.
Your data stays private
This JSON formatter runs entirely in your browser using JavaScript. No data is ever sent to a server. Safe for API keys, tokens and sensitive payloads.