JSON Formatter & Validator — Pretty Print JSON Free
Paste JSON to validate it and format it with indentation — or minify it for production use. Errors are shown with their exact line and position, so you can fix them fast.
JSON Formatter & Validator
Paste JSON to validate it and format it with indentation — or minify it for production.
How to use it
- Paste your JSON into the box.
- Tap “Format (pretty)” to indent it, or “Minify” to compress it.
- Fix any error shown, then copy the result.
Frequently asked questions
What is JSON?
JavaScript Object Notation — the standard text format for data exchanged between websites, apps and APIs.
What error does it show?
The exact line and column of the first syntax error, for example a missing comma or an unquoted key.
Is my JSON uploaded?
No. Validation and formatting happen entirely in your browser.
When should I minify JSON?
When sending data over the network or storing it — minified JSON is smaller, while pretty JSON is for humans to read.
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