Runs locally

JSON Formatter

Processed on your device · No uploads

Beautify or minify your JSON data instantly.

JSON Input
Format / Minify
Indent
Result

How to Format JSON

  1. Paste your JSON data into the input area on the left.
  2. Choose indentation (2 spaces, 4 spaces, or tab) and format or minify mode.
  3. View the formatted result on the right and click Copy to copy to clipboard.

The JSON formatter neatly indents JSON that's crammed onto one line, or does the opposite and minifies it by stripping whitespace. It's especially handy for developers inspecting API responses, tidying config files, or hunting down syntax errors.

Format vs minify

Formatting adds indentation and line breaks so the structure is easy to scan; minifying removes unnecessary whitespace to shrink the file and speed up transfer. Choose 2 spaces, 4 spaces, or tabs for indentation.

Finding syntax errors

Paste invalid JSON and it tells you where the problem is, catching common mistakes like missing quotes or stray commas. Everything runs in your browser, so even sensitive data stays safe.

Frequently Asked Questions

What happens if my JSON is invalid?
An error message will appear showing exactly where the syntax error occurred.
What is JSON minification?
Minification removes all unnecessary whitespace and line breaks, compressing JSON into a single line. Useful for reducing file size or API payloads.
Is my data sent to a server?
No. All processing happens locally in your browser — your data never leaves your device.
Is my data sent to a server?
No. All formatting and validation happens entirely in your browser and is never transmitted.
Can it handle large JSON?
Yes. Typical sizes are no problem; very large files may be a little slower depending on your device.

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