JSON Formatter
Format, validate, and minify JSON data with syntax highlighting
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About this tool
About JSON Formatter
JSON Formatter is a free, browser-based tool that lets you format, validate, and minify JSON data with syntax highlighting. It supports JSON → Formatted. Everything runs locally on your device, so your files are never uploaded to a server. There's no sign-up, no watermark, and no limit — just open JSON Formatter, add your input, and get results instantly.
How to use JSON Formatter
1
Paste JSON
Enter your raw or minified JSON string.
2
Format / Minify
Toggle between pretty-print and compact output.
3
Copy Result
Copy the valid JSON string to your clipboard.
Key features
Readability
Instantly turn a massive unreadable string into a perfectly indented tree.
100% Private
JSON Formatter processes your data locally in the browser. Nothing is uploaded, tracked, or stored — your files never leave your device.
Completely Free
Use JSON Formatter as much as you want with no fees, no watermarks, and no hidden limits.
No Installation
JSON Formatter runs in any modern browser. There's nothing to download, install, or configure.
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