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Format, Minify & Validate JSON

Professional JSON formatter with instant processing. Format, minify, and validate JSON instantly.

Instant Processing
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Frequently Asked Questions

CodBolt's JSON Formatter is a free online tool that lets you Format (beautify), Minify (compact), and Validate JSON data — all in your browser. It handles files up to 100MB and processes everything locally, so your data is never sent to any server.
Format (beautify) adds proper indentation and line breaks to make JSON human-readable. Minify does the opposite — it removes all whitespace and produces the most compact version, useful for reducing file size in production environments.
The Validate operation uses the browser's native JSON.parse() to check your JSON for syntax errors. If valid, it also formats the output so you can confirm the structure. If invalid, an error message pinpoints exactly where the problem is in your JSON.
You can choose between 2 Spaces, 4 Spaces, or Tab indentation for the formatted output. Select your preferred style from the Indent dropdown before clicking Process.
You can upload JSON files up to 100MB. Files larger than 100MB will be rejected. For very large files, the tool processes asynchronously to keep the browser responsive.
Yes. After processing, click the Download button to save the output as a data.json file. You can also use the Copy button to copy the result to your clipboard instantly.