How to Format and Validate JSON Online
Readable JSON is essential for debugging APIs and config files.
Why format JSON?
Minified JSON is hard to read. Formatting adds indentation so structure is clear.
How to use
Paste your JSON, click format, and get clean indented output — errors are flagged instantly.
Validation
A formatter also validates syntax, catching missing commas or brackets.
Minify too
For production, minify JSON to reduce payload size.
Try it free: Use our Format and Validate JSON Online tool — instant, private and no sign-up.