JSON Formatter

Beautify, validate or minify your JSON in seconds. Everything runs locally in your browser, so your data never leaves your device.

Indentation

2 Spaces 4 Spaces Tab

Paste your JSON below:

Result:

How to format JSON

Paste your raw or minified JSON into the input box.
Pick an indentation style: 2 spaces, 4 spaces or a tab.
Click Format to beautify it, Minify to compress it, or Validate to check it.
Copy the result with one click when you are happy with the output.

FAQs

Is my JSON uploaded to a server?

No. All formatting, validation and minification happens in your browser. Your data is never transmitted or stored anywhere.

What does a JSON formatting error mean?

It means the text is not valid JSON. The error message shows the approximate line and column so you can fix the missing comma, brace or quote.

Why should I format JSON?

Formatted JSON with consistent indentation is far easier to read, debug and share with teammates than a single long line of text.

Is the JSON Formatter free?

Yes. Every Handio tool is free, with no sign-up, no file size limits and no watermarks.

Related Tools

JSON Minifier CSV to JSON Base64 Encoder / Decoder Hash Generator URL Encoder / Decoder SQL Formatter JSON to YAML YAML to JSON XML Formatter JWT Decoder Regex Tester

Why use a JSON formatter?

Developers use a JSON formatter whenever a minified API response or config file becomes unreadable. It makes nested structures and syntax errors easy to spot, which speeds up debugging and collaboration.

Debug an API response that arrives as one long unformatted line.
Beautify a config file before reading it or sharing it with your team.
Validate JSON and locate the exact line of a missing comma or brace.

Tips and Limits

The formatter only works on valid JSON — if your text has a syntax error, it cannot be formatted until you fix it. Everything runs locally in your browser, so your data never leaves your device.