JSON Formatter and Validator

Pretty-print, minify, escape, unescape and validate JSON directly in your browser. Useful for API responses, configuration files and debugging without uploading sensitive data.

Security note: use local processing for convenience, but always verify your browser, extensions and third-party scripts before entering secrets.

Format JSON

Turn compact or difficult-to-read JSON into an indented, readable structure.

Validate JSON

Get a visible error message when the input is not valid JSON instead of silently failing.

Export results

Copy the result or download a formatted JSON file for your editor, API client or documentation.

Frequently asked questions

Can I format JSON containing API keys?

The core formatter is designed to process text in your browser, but you should still review the page privacy policy and avoid entering secrets if you do not control the browser environment.

What is the difference between format and minify?

Format adds indentation and line breaks for readability. Minify removes unnecessary whitespace to reduce the text size.

Can this fix every JSON error?

It reports parsing errors and helps you locate a problem. It does not guess your intended data structure or repair arbitrary source code.