Online JSON Formatter — Format, Validate, and Minify
Paste minified or malformed JSON and get a readable, indented version — or go the other way and minify it — with validation errors pointing at exactly what's wrong.
Open the JSON FormatterWhy use this
- •Format, validate, and minify in one tool
- •Clear error messages when the JSON is invalid
- •Nothing you paste is sent anywhere
How it works
- 1.Paste your JSON into the input
- 2.Choose format or minify
- 3.Copy or download the result
Read more
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Frequently asked questions
- Is it safe to paste API responses with real data here?
- Yes, everything runs locally in your browser with no network calls, so pasted data is never transmitted.
- What happens if my JSON is invalid?
- The tool reports a validation error so you can locate and fix the problem before using the file elsewhere.