JSON Formatter
Format, validate and minify JSON.
Runs in your browser: what you paste is never uploaded
How to use JSON Formatter
- 1Paste or type your inputUse the box above, or click Sample to try it with an example.
- 2Choose your optionsChoose Format or Minify, the indent, and whether to sort keys alphabetically.
- 3Copy the resultCopy it with one click. Nothing is sent anywhere.
About JSON Formatter
Format messy or minified JSON into readable, indented text, validate it with clear error locations, or minify it for production.
Frequently asked questions
Where is the error in my JSON?
Invalid JSON is reported with the line and column of the problem, and what was expected there.
Does it support comments or trailing commas?
No. It validates strict JSON, which is what APIs and JSON.parse accept.
Is what I paste sent anywhere?
No. The tool runs entirely in your browser and never sends what you type or paste to a server.
Is it free?
Yes. It's free, with no sign-up and no limits.