JSON Formatter & Validator

Pretty-print, minify and validate JSON online. Get precise error locations for broken JSON, and copy or download the formatted result. Everything runs locally in your browser.

How to Use

  1. 1

    Paste your JSON into the input area.

  2. 2

    Click Format to pretty-print with 2-space indentation, or Minify to remove all whitespace.

  3. 3

    Click Validate to check syntax without changing the text - errors show the exact position in your input.

  4. 4

    Copy or download the result with one click.

Frequently Asked Questions

How do I find where my JSON is broken?

Paste the JSON and click Validate. The error message includes the character position, and the tool shows a snippet of your input around that exact spot so you can fix it quickly.

Does the formatter change my data?

No. Formatting only changes whitespace and indentation; keys, values and their order are preserved exactly.