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JSON Prettifier
Format, validate and minify JSON — right in your browser.
About this tool
Paste raw or minified JSON and get it formatted with consistent indentation, or minify it back to a single compact line. Parse errors are reported with the exact line and column so you can fix broken payloads fast. Everything runs locally in your browser — your data is never uploaded anywhere.
- Beautify an API response before reading or diffing it
- Minify a config file before shipping it
- Find the exact line and column of a syntax error
- Inspect localStorage or log payloads without installing anything