Developer tool · Free · No sign-up

JSON Beautifier

Format, validate and minify JSON with clear error messages.

Valid JSON

Input

Output

Formatted JSON appears here…

About this tool

This free JSON beautifier formats messy or minified JSON into clean, readable, properly indented output. It validates your JSON as you go and points to the exact location of any syntax error, so you can fix it fast. You can also minify JSON to the smallest valid form, choose 2 or 4 space (or tab) indentation, and copy or download the result. Everything runs locally in your browser.

Key features

Live validation

Instant valid/invalid status with a precise error message.

Beautify or minify

Pretty-print for reading or compress to the smallest valid form.

Flexible indentation

Switch between 2 spaces, 4 spaces or tabs.

How to use it

1Paste your JSON into the input box.
2Choose your indentation (2 spaces, 4 spaces or tabs).
3Click Beautify to pretty-print, or Minify to compress it.
4If the JSON is invalid, read the error message to locate the problem.
5Copy or download the formatted result.

Common use cases

Debugging API responses and config files.
Cleaning up minified JSON copied from a network tab.
Validating JSON before pasting it into code.

Frequently asked questions

Does it validate my JSON?

Yes. If the JSON is invalid, the tool shows a clear error message describing what went wrong so you can correct it quickly.

What's the difference between beautify and minify?

Beautify adds indentation and line breaks for readability; minify removes all unnecessary whitespace to produce the smallest valid JSON, which is useful for payloads and storage.

Is my data sent to a server?

No. Parsing, formatting and minifying all happen in your browser — your JSON never leaves your device.

Private and free. Most of our tools run entirely in your browser, so the data you enter isn't uploaded or stored. There's no sign-up, and there never will be — they're built by the Fusion Trail Solutions team to be genuinely useful.