JSON Formatter & Validator

Format, validate, and minify JSON in your browser. Pretty-print with 2/4 spaces or tabs, or minify. Nothing uploaded.

By AbraCalc Editorial Team · Reviewed by AbraCalc Methodology Review · Last reviewed: 2026-06-25

JSON

Pure browser JavaScript (uses the built-in JSON parser).

Embed this tool on your site

<iframe src="https://abracalc.com/app/json-formatter/" width="100%" height="640" style="border:1px solid #e4e7ec;border-radius:12px" loading="lazy"></iframe>

How to use this tool

Paste JSON.
Click Format (validates + pretty-prints) or Minify.
Copy or Download the result.

Format, validate, and minify JSON in your browser. Pretty-print with 2/4 spaces or tabs, or minify. Nothing uploaded.

Frequently asked questions

Is my JSON sent anywhere?: No — it is parsed locally by your browser.

References & sources

JSON (Wikipedia)