JSON Formatter & Validator
Format, validate and minify JSON — with clear error locations. Great for schema debugging.
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About this tool
Paste any JSON — including JSON-LD structured data — and format it with proper indentation, validate it with the exact error position highlighted, or minify it for production. Everything runs locally, making it safe for API keys and private payloads.
How to use the JSON Formatter & Validator
- Paste your JSON (or JSON-LD schema markup).
- Click Format, Validate or Minify.
- Fix any reported error (line and character shown) and copy the result.
Frequently asked questions
Why does my JSON-LD fail Google’s rich results test?
Nine times out of ten it is a syntax error — a trailing comma or unquoted key. Validate here first, then check required properties with our Schema Generator’s validator.
Is my data uploaded anywhere?
No — parsing happens entirely in your browser.