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Text and dev tool

JSON formatter online free

Format, minify and validate JSON in your browser. Paste it in and get readable, indented JSON. Your JSON stays on your device.

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Processing mode: Private Runs in your browser

Waiting for JSON.

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How to use it

How to use JSON Formatter

  1. Paste JSON into the editor.
  2. Format, minify, or validate it.
  3. Copy the cleaned output.

Good for

Common use cases

Useful for developers, marketers working with APIs, no-code operators, and anyone cleaning structured data.

Privacy

Runs in your browser

Files are processed by your browser. They never reach our servers.

Questions

JSON Formatter: common questions

Does this send JSON to a server?

No. The current formatter runs in your browser.

Why does my JSON show an error?

The validator points to the first character it cannot parse. The most common culprits are trailing commas, single quotes around strings, unquoted keys, and unescaped line breaks inside string values.

What's the difference between format and minify?

Format pretty-prints the JSON with indentation so it's readable in code review and bug reports. Minify strips whitespace so the payload is as small as possible — useful for embedding in URLs, logs, and config files.

Will this tool stay free?

Yes. Everything this tool does is free. On some tools, a Day or Project Pass raises the file-size and batch limits if you need more.