Brightbar JSON Viewer - Formatter, Beautifier & API Response Viewer

JSON viewer and formatter: fast tree view for huge files, dark mode, JSONPath search, exact big numbers. No tracking. Open source.

Brightbar JSON Viewer turns any JSON response into a fast, readable tree. It is a JSON formatter and viewer that stays quick on huge files, keeps big numbers exact, and never tracks you. Free, with no account. TREE VIEW AND FORMATTER - Formats JSON automatically: application/json, the +json types, and JSON sent as text/plain or JavaScript (JSONP included) - Collapsible tree with syntax colours, item counts, clickable links, readable dates and colour swatches - Light, dark and system themes; pick the font, text size and indentation, applied instantly without reloading - Raw view of the untouched response, with line numbers and wrapping BIG FILES WITHOUT FREEZING - Opens a 16 MB, 60,000-object document in well under a second and stays responsive while you scroll, search and expand everything - Only the rows on screen are drawn, so a bigger file does not mean a slower page FIND ANYTHING - Search keys and values with a live match count; Enter jumps to each match - Filter mode shows just the matches and the structure around them - JSONPath queries in the same box: $.data[*].email, $..price, $.items[?(@.price < 10)] - Table view turns an array of objects into a sortable table EXACT AND CORRECT - Big numbers stay exact: IDs like 149883901923910003 are shown, searched and copied as sent, never rounded - Invalid JSON gets an error view with the message, line and column, plus an option to parse leniently (comments and trailing commas) - Copy any value as valid JSON, copy its path as JSONPath, a JS accessor or a JSON Pointer, or download the document KEYBOARD AND ACCESSIBILITY - Full keyboard navigation of the tree (arrow keys, Home and End, Enter, *), built as an accessible tree for screen readers - Shortcuts: / to search, e and c to expand and collapse everything, 1 to 3 to show that many levels A VIEWER PAGE OF ITS OWN - Paste JSON, open a file or drop one: JSON, JSON with comments and NDJSON, validated as you type, with Format and Minify PRIVATE, AND YOU CAN CHECK - No tracking, analytics, ads or donation popups, and no network requests of its own - Open source: https://github.com/brightbar-dev/json-viewer-pro - Every build runs an automated check that fails if the code contains a network API, a remote address or code built from strings - One API permission, storage, for your settings - Hovering an image URL shows a thumbnail loaded from that address; you can turn previews off in the options WHY CHROME SAYS "READ AND CHANGE ALL YOUR DATA ON ALL WEBSITES" To recognise a JSON response, the extension has to look at every page you open. On ordinary pages it checks the page's content type and stops, without reading the page. On a JSON response it reads the response in order to display it. Nothing is sent anywhere.