JSON Beautifier
Paste, drop, or open a JSON file on the left. The right panel shows a validated, indented result you can copy or download.
Private JSON Formatter & Validator
Debug, format, and validate your JSON data securely. Unlike other online formatters, our JSON Beautifier runs entirely in your browser.
- Secure: Your sensitive JSON data (API keys, config) never leaves your computer.
- Error Highlighting: Instantly spot syntax errors and invalid JSON.
- Minify & Beautify: Switch between pretty-print (indented) and minified (compact) views.
- Local Processing: Works offline and handles large JSON files efficiently.
How to Format JSON
Clean up raw JSON data in three steps:
- Input: Paste your raw JSON string into the left editor or drag a .json file in.
- Validate: The tool automatically formats valid JSON in the right panel. Errors will be highlighted in red.
- Export: Click "Copy" or "Download" to save the clean, formatted JSON.
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Frequently Asked Questions
No, your JSON data never leaves your device. All formatting, validation, and minification happens directly in your web browser. This means your API keys, configuration files, and sensitive data stay completely private.
Yes, this tool is completely free with no limits. Format as much JSON as you need without creating an account or paying anything.
You can beautify (pretty print) JSON with proper indentation, validate JSON syntax to find errors, and minify JSON to reduce file size. The tool also highlights syntax errors so you can fix them quickly.
Yes! Once this page loads in your browser, you can disconnect from the internet and continue formatting JSON. All processing happens locally on your device.
The tool will highlight syntax errors and show you exactly where the problem is in your JSON. This helps you quickly identify missing commas, brackets, or other formatting issues.