JSON Formatter & Validator

Format, minify, and validate JSON with clear error messages.

100% Private — Nothing is Uploaded

All processing happens locally in your browser. Your files never leave your device and are never sent to any server.

Input

Indentation

Sort keys alphabetically

Result

About the JSON Formatter

This tool formats and validates JSON. Paste any JSON and get a clean, indented version — or switch to minify mode to strip all unnecessary whitespace.

Features

Format — beautify JSON with 2 spaces, 4 spaces, or tabs.
Minify — remove all whitespace for the smallest possible output.
Validate — get a precise error with line number if the JSON is invalid.
Sort keys — sort object keys alphabetically for consistent diffs.