Developer · Free tool
JSON Formatter
Format, minify, compare, copy, and download JSON in your browser.
Instant resultsPrivate by defaultNo sign-up
Your data stays in this browser
Numbers are parsed using JavaScript JSON rules; very large integers may lose precision.
About this json formatter
Clean up compact or hard-to-read JSON, check whether it is valid, and compare two documents without sending the data to a server.
How to use it
- Paste or upload your JSON.
- Choose format, minify, validate, or compare.
- Copy or download the resulting JSON.
Common uses
- Debug an API response
- Prepare configuration files
- Compare two JSON payloads
Common questions
Does this JSON formatter upload my data?
No. Formatting, validation, and comparison run in your browser.
Can it fix invalid JSON?
It identifies parsing errors, but it does not guess how invalid data should be rewritten.