JSON Formatter / Validator

The JSON Formatter & Validator is a dual-purpose tool that both beautifies (pretty-prints) raw JSON data with proper indentation and validates it for syntax errors. Whether you are debugging an API response, inspecting configuration files, or formatting data for documentation, this tool provides instant results.

It supports customizable indentation (2 spaces, 4 spaces, or tabs) and includes a one-click minification mode that strips all whitespace — perfect for reducing payload sizes. Invalid JSON triggers a clear, descriptive error message pointing you to the exact parsing issue.

Format or validate your JSON in seconds:

1. Paste your JSON data into the input textarea.
2. Click 'Format' to beautify with indentation, or 'Minify' to compress.
3. Choose your preferred indentation level from the dropdown.
4. If the JSON is invalid, an error message will appear with the specific syntax issue.
5. Copy the formatted result with the Copy button.

JSON formatting is a daily necessity for modern developers:

• API Debugging: Format minified API responses to inspect nested data structures and debug issues.
• Configuration Files: Validate and beautify package.json, tsconfig.json, and other config files.
• Documentation: Format JSON examples for technical documentation with consistent indentation.
• Payload Optimization: Minify JSON data to reduce network transfer size for API requests.