JSON Formatter & Validator
Format, validate, and minify JSON instantly. Free, runs in your browser, no signup required.
Free JSON Formatter & Validator — No Signup Required
Our JSON Formatter instantly beautifies, validates, and minifies JSON data. Paste any JSON — from API responses, config files, or databases — and get perfectly formatted output with your preferred indentation.
How does it work?
Paste your JSON into the input area, choose your indentation (2 or 4 spaces), and click "Format" to beautify or "Minify" to compress. Invalid JSON is caught instantly with a clear error message showing exactly what went wrong.
Is it really free?
Yes. This tool runs entirely in your browser — your data never leaves your device. No signup, no limits, no API calls. Use it as many times as you want.
Is my data safe?
Absolutely. JSON formatting happens 100% client-side in your browser. Your data is never sent to any server. This makes it safe for sensitive API keys, configuration files, and private data.
Who is this tool for?
Developers, QA engineers, API testers, data analysts, and anyone who works with JSON regularly. Perfect for debugging API responses, cleaning up config files, or making JSON readable for documentation.