JSON Formatter Online

Paste compact or messy JSON on the left and get clean, 2-space indented output on the right. Browser-only — your data never leaves your device.

Why format JSON?

Minified JSON is efficient for transmission but difficult to read and debug. Formatting adds whitespace and indentation so you can quickly scan key-value pairs, review nested structures, and identify problems during API testing or code reviews.

FAQ

Does formatting change the data?

No. It only adds whitespace. The parsed values remain identical.

What if my JSON is invalid?

You'll see a clear parse error message. Use JSON Validator for a dedicated validation check with error position details.

Can I format minified JSON from an API response?

Yes, that is the primary use case. Paste, format, review.

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