JSON Formatter & Validator
Paste your JSON to format, minify, or validate it instantly. Configurable indentation with real-time error detection.
How to Use This Tool
- Step 1Paste Your JSON
Paste raw JSON into the input panel on the left. It can be minified, malformed, or deeply nested.
- Step 2Choose Indentation
Select 2 spaces, 4 spaces, or tabs from the indent dropdown to match your project's code style.
- Step 3Format or Minify
Click Format to beautify with proper indentation. Click Minify to compress into a single line for production.
- Step 4Copy the Result
Click the Copy button to copy the formatted or minified output to your clipboard, ready to paste anywhere.
- •Invalid JSON shows a red error with the exact position of the syntax error — great for debugging API responses.
- •Minified JSON is ~30-40% smaller than formatted — use it for config files, API payloads, and localStorage values.
- •This tool runs entirely in your browser — your data never leaves your machine.
Why Use a JSON Formatter?
JSON (JavaScript Object Notation) is the standard data format for APIs, configuration files, and data exchange. Unformatted JSON is difficult to read and debug.
This tool formats JSON with proper indentation, validates syntax in real-time, and can minify JSON for production use. It supports 2-space, 4-space, and tab indentation.
Common use cases: debugging API responses, formatting configuration files, validating JSON payloads before sending to APIs, and converting between formatted and minified JSON.