JSON Formatter — Free Online JSON Beautifier & Validator

Updated July 2026 · 2 min read

Need to format, validate, or compress JSON? Paste your messy JSON and get a clean, indented result instantly. Our free online tool also validates syntax and minifies JSON — no signup required.

How to Format JSON

1. Open the JSON Formatter
2. Paste your raw JSON data
3. Click "Format" for beautified output, or "Compress" for minified
4. Copy the result or download as .json

Features

• Beautify — Indent JSON with 2 or 4 spaces for readability
• Validate — Instant syntax check with error highlighting
• Compress — Minify JSON to save bandwidth
• Large Files — Handles JSON up to several MB

FAQ

Is my data sent to a server?

No. All formatting happens in your browser.

What's the max file size?

Handles up to 5MB comfortably. Larger files may slow down.

Does it escape special characters?

Yes. Handles Unicode, escaped quotes, and nested structures.

👉 Format your JSON now →

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