Brace – JSON Viewer

Formats JSON in the browser with configurable indents, indent guides, line numbers, collapsible nodes and one-click copy.

Readable JSON, the way your IDE shows it. Open any JSON URL and it's instantly formatted with clean indentation, colour highlighting and an editor-style layout. Everything runs locally in your browser. FEATURES • Indent of your choice: 2 spaces (default) or 4 spaces • IDE-style indent guides: vertical guide lines plus faint dots for each indent space • Line numbers that keep their original values when you collapse sections • Collapse and expand any object or array; collapsed sections show how many items or keys they hold • One-click copy: hover over any object or array and click Copy to put it on your clipboard, formatted with your chosen indent • Colour highlighting for keys, strings, numbers, booleans and null • Light, Dark or System theme (follows your OS by default) • Font choice: JetBrains Mono (bundled), or Monaco and Menlo on macOS • Switch between Parsed and Raw views at any time • Your font, indent and theme choices are saved and sync across your Chrome browsers PRIVACY This extension collects no data and makes no network requests. JSON is formatted on your device and never leaves your browser. The only thing it stores is your display settings, saved in Chrome's own synced storage. TIPS • If you have another JSON formatter installed, turn it off so the two don't conflict. • To format local .json files, open the extension's Details page in chrome://extensions and turn on "Allow access to file URLs". JetBrains Mono is used under the SIL Open Font License 1.1.