JSON Formatter and Validator
Paste JSON to validate it, see errors with line numbers, and format or minify it.
Free, no signup needed. Runs 100% in your browser.
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How to use this tool
- Paste your JSON.
- Read any validation error.
- Copy the formatted or minified result.
Frequently asked questions
Is my JSON uploaded?
No. Parsing happens locally in your browser.
What errors does it catch?
Trailing commas, missing quotes, and unbalanced brackets, with the position of the failure.
Is it free?
Yes, free with no signup.
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