JSON Formatter

Online JSON Formatter & Validator

Paste your JSON here to auto-fix invalid syntax, format it with custom spacing, minify output, copy it quickly, or download a clean JSON file.

Input JSON

Actions

Output JSON

How it Works

This tool repairs and formats JSON in the browser, converting malformed syntax into clean, readable output without sending your data to a server.

Step-by-step Instructions

Paste or type your JSON into the input editor.
Click a format button to repair, indent, or minify your JSON.
Copy the result or download a clean JSON file when you are finished.

FAQ

Is my JSON data stored?

No. All formatting and validation happen locally in your browser, and nothing is saved to our servers.

Can I fix invalid JSON?

Yes. The tool attempts to repair malformed JSON so you can format or minify it immediately.

Does this work offline?

Yes. Once the page loads, all JSON processing continues directly in your browser without additional server calls.

Privacy-First Guarantee: We do not store your data on our servers.