JSON Formatter
Format, minify and validate JSON instantly. Clear syntax error messages with position, one-click copy and download in your browser.
How to use
- 1
Paste your JSON.
- 2
Click "Format", "Minify" or "Validate".
- 3
Syntax errors are highlighted with the offending position.
How it works
The JSON parser is used to validate and rebuild the structure; formatting is applied deterministically with two-space indentation. Errors point at the exact character that broke parsing.
Frequently asked questions
Is the JSON uploaded?
No - parsing and formatting happen locally.
Does it accept comments or trailing commas?
No - standard JSON only. Strict validation is the point.
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