JSON Formatter

JSON (JavaScript Object Notation) is the standard data format for web APIs and configuration files. Minified JSON (no whitespace) is efficient for transmission but hard to read. Formatting adds indentation and line breaks, making the structure immediately visible. This is essential for debugging API responses, editing configuration files, and understanding data structures.

Paste your JSON in the input area. Click Format JSON to beautify it with proper indentation. Click Minify JSON to compress it into a single line. The tool validates your JSON and highlights any syntax errors with the position of the problem.

This tool processes JSON entirely in your browser and can handle files with thousands of lines. For very large files (over 1MB), formatting may take a moment. No data is uploaded to any server.