JSON Validator, Formatter & Beautifier: Free Online Tool

JSON Validator, Formatter & Beautifier

Validate, beautify, and debug your JSON instantly—free and no sign-up required.

Paste your JSON:

{}

How to Use This Tool

1. Paste or Write JSON: Drop your raw or formatted JSON into the text box.

2. Validate: Click “Validate” to check if your JSON is syntactically correct.

3. Beautify: Click “Beautify” to auto-format your JSON for better readability.

4. Minify: Click “Minify” to compress your JSON into a compact, one-line format.

5. Generate Sample: Use “Generate Sample” to load a valid, editable example instantly.

6. Reset: Clear all fields and results with the “Reset” button.

7. Copy: Click “Copy” to place your validated or formatted JSON on the clipboard.

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JSON Validator, Formatter & Beautifier: FAQ

A JSON validator checks whether your JSON data is properly structured and syntactically correct according to JSON standards.

Invalid JSON can break APIs, web apps, and automation scripts. Validating ensures your data is clean, reliable, and ready for use in development or production.

Beautifying JSON makes it human-readable by adding indentation and line breaks. This helps with debugging, editing, and understanding nested structures.

Minified JSON removes all whitespace and line breaks to reduce file size. It's commonly used in production environments for faster transmission.

No. All validation and formatting happens locally in your browser. Your data never leaves your device or gets logged on a server.

Yes, but browser performance may vary depending on the size. The tool is designed for quick inspection and editing of small to moderately large JSON payloads.

This usually means there’s a syntax issue like a missing comma, unquoted key, or a trailing comma. The tool provides helpful suggestions to guide you toward a fix.

JSON is a strict text-based data format, while JavaScript objects can include functions and undefined values. JSON must use double quotes for keys and strings.

Yes! Use the “Copy” button to copy the entire JSON block to your clipboard. You can then paste it into your code, config file, or anywhere else.