What does this tool do?

This tool formats (pretty prints) JSON data with proper indentation, minifies JSON by removing whitespace, and validates that your JSON is syntactically correct.

What indentation options are available?

You can choose 2 spaces, 4 spaces, 8 spaces, or tab indentation for the formatted output.

Yes! All processing happens entirely in your browser. Your JSON data is never sent to any server.

What if my JSON is invalid?

The tool will show an error message describing the syntax issue, helping you identify and fix the problem in your JSON.

JSON Formatter

Your files never leave your device

Format, minify, and validate your JSON data. Pretty print with custom indentation. All processing happens in your browser — your data never leaves your device.