JSON Formatter & Beautifier
Format and beautify your JSON with syntax highlighting, collapsible tree view, and multiple indentation options — all in your browser, instantly.
Get notified the day we launch. No spam, ever.
What to expect
Built for developers
Paste raw or minified JSON and instantly get back a clean, human-readable format with color-coded syntax, collapsible nodes, and configurable indentation.
Runs client-side. Your data never leaves your browser.
No ads, no trackers, no popups. Pure focus.
Paste code or upload files. Both modes supported.
Share output with teammates via a permanent link.
Adapts to your system preference automatically.
Fully responsive. Works on any screen size.
More tools coming
Related tools
OpenFormatter is launching with 30+ tools on day one.
About this tool
OpenFormatter's JSON Formatter & Beautifier lets you format JSON online for free with zero configuration. Supports pretty printing with 2-space, 3-space, 4-space, tab, and compact modes. Features a collapsible JSON tree view, syntax highlighting for objects, arrays, strings, numbers, booleans and nulls, and real-time JSON validation against RFC 4627. Works with copy-paste or file upload. No data is sent to any server — all processing happens in your browser.