JSON Format / Validate

JSON (JavaScript Object Notation) is the ubiquitous data format for APIs and configuration. Our JSON Formatter & Validator helps you instantly prettify minified JSON, compress formatted JSON, and catch syntax errors. When a parsing error occurs, the tool pinpoints the exact line and character, saving you hours of debugging.

How to use the JSON Formatter

• Paste your raw JSON string into the input area.
• Click "Format" to pretty-print with proper indentation, or "Minify" to strip whitespace.
• If there are syntax errors, a red warning will appear indicating the exact failure point.

Why run this locally?

Pasting sensitive API responses containing PII or proprietary data into online formatters can be a security risk. This tool runs 100% in your browser. No data is ever transmitted to a server.