JSON Formatter

Working with JSON

JSON (JavaScript Object Notation) is a lightweight data interchange format used by virtually every web API and configuration system. Formatting JSON with proper indentation makes it readable for humans; minifying it removes all whitespace to reduce file size for transmission. This tool handles both operations using the browser's native JSON parser.

The Validate button checks whether your input is well-formed JSON and reports the exact location of any syntax errors. Choose your preferred indentation style (2, 3, or 4 spaces, or tabs) to match your project's conventions. All processing runs locally in your browser — your data is never sent to a server.