Home Web & Dev

That one website that formats and checks messy JSON

Why it's the pick

Paste JSON, a URL or a file and it pretty-prints the data and validates it against the spec you choose (RFC 8259, ECMA-404 or older). It points to errors and can auto-fix common mistakes like trailing commas and wrong quotes. Its FAQ says your data isn't recorded or saved.

Know a better one? Tell us

2 good alternatives

JSONLint jsonlint.com Classic JSON validator and reformatter FreeNo signup Link checked Oct 1 JSON Crack jsoncrack.com Turns JSON into a graph you can explore, in your browser FreeNo signup Link checked Oct 1

More in Web & Dev

That one website that checks if a website is down for everyone Down for Everyone or Just Me downforeveryoneorjustme.com FreeNo signup That one website that shows what a website used to look like Wayback Machine web.archive.org FreeNo signup That one website that tests regular expressions regex101 regex101.com FreeNo signup That one website that makes beautiful screenshots of code Carbon carbon.now.sh FreeNo signup That one website that tells you which browsers support a feature Can I Use caniuse.com FreeNo signup That one website that makes a favicon for every browser and device RealFaviconGenerator realfavicongenerator.net FreeNo signup