JSON Formatter
Format, validate and minify JSON online for free. Paste your JSON and see it indented and organized in an instant, with error detection. Everything runs in your browser, with nothing sent to servers.
How to use
- 1Paste your JSON into the text box.
- 2Click Format to indent it or Minify to compact it.
- 3Copy the result with one click.
What it's for
- Make a compressed JSON from an API readable.
- Validate JSON syntax before using it in your code.
- Minify JSON to reduce its size in production.
- Inspect API responses while developing.
Frequently asked questions
Is the JSON formatter free?
Yes. It's completely free with no usage limits.
Is my JSON sent to a server?
No. Formatting and validation happen entirely in your browser. Your data never leaves your device.
How do I know if my JSON is valid?
If there's a syntax error, the tool tells you and points to where the problem is. If everything's fine, you see the formatted JSON.
What's the difference between format and minify?
Formatting adds indentation and line breaks so the JSON is readable. Minifying removes whitespace to make the file as small as possible.
Do I need an account?
No. The tool works right away, with no signup or login.