A high quality, completely free JSON formatter.
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Use this JSON editor component and dozens more to build and deploy your own internal tools in minutes.
Try Compose
Beautify, minify, and validate JSON instantly, right in your browser. Paste any raw or compact JSON above, hit format and get a clean result you can copy, inspect, or download. No ads, no sign‑ups, and your data never leaves your computer.
Does this JSON formatter upload my files?
No. All processing happens entirely in your browser. Your JSON never touches our servers, making this tool safe for sensitive data.
Can it handle large JSON documents?
Yes. Powered by the same Ace editor used in thousands of professional text editors, it comfortably handles files up to several megabytes.
Who maintains this project?
This formatter is built and maintained by the engineers behind Compose, an open‑source platform for internal tools with just backend code.