Free JSON Formatter & Validator Online
Beautify, parse, minify, and validate JSON data instantly in your browser. The best free developer tool for 2026.
Input JSON
Output
How to Use
Paste your raw, minified, or messy JSON data into the input box on the left.
Choose your preferred indentation level (2 spaces, 4 spaces, or Tab).
Click "Format JSON" to beautify the code, or "Minify JSON" to compress it.
If there are syntax errors, the tool will instantly highlight them in red.
Click the Copy button to copy the formatted JSON to your clipboard.
Features
FAQ
Working with messy APIs or large configuration files in 2026? Our free online JSON Formatter and Validator is the ultimate developer tool for backend engineers, frontend developers, and data scientists. Paste your unreadable or minified JSON strings to instantly beautify them into a clean, structured, and highly readable format. If your payload is broken, our strict validator will catch syntax errors, missing commas, and invalid quotes in real-time. Because this tool runs 100% locally in your browser, you can safely format sensitive payloads containing API tokens, user data, or secure credentials without worrying about server tracking or data leaks.
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