JSON Formatter

Ready

How to use this JSON formatter

  1. Paste any raw or minified JSON.
  2. It reformats with proper indentation automatically as you type.
  3. If there's a syntax error, you'll see exactly where it is.

Why format JSON?

Minified JSON from APIs is hard to read. Formatting adds consistent indentation so you can quickly spot nested objects, arrays, and mismatched brackets.

Does this validate my JSON?

Yes. If the JSON is invalid, this tool shows the exact parser error and position so you can find and fix the problem quickly.

Does this send my JSON anywhere?

No — formatting and validation happen entirely in your browser using JavaScript's built-in JSON parser. Nothing is uploaded.

Can this handle very large JSON files?

Yes, within the limits of your browser's memory — very large files (tens of MB) may cause the page to feel sluggish while formatting.