JSON Viewer

by rxliuli · rxliuli.com · Developer Tools

Established publisherManifest V3 Free

View in Chrome Web Store Data as of 16 Oct 2026

The most beautiful and customizable JSON/JSONP highlighter that your eyes have ever seen

Users

−1 in 30 days

Rating

0.0 / 5

unchanged in 30 days

Ratings

0 in 30 days

Store rank

#146K

#122K among extensions

Version

0.19.7

updated 13 May 2026

Users

monthly, 6 months

Latest, 16 Oct 2026: 22 usersMove the mouse over the chart for any month

Ratings count

monthly, 6 months

Latest, 16 Oct 2026: 0 ratingsMove the mouse over the chart for any month

The Chrome Web Store rounds user counts down to the leading digit, so the user line moves in steps. The ratings count is exact and is the better signal of real adoption.

About JSON Viewer

JSON Viewer highlights JSON and JSONP content directly in your browser. When you open a URL that returns JSON, the extension automatically formats and syntax-highlights it. This is a maintained fork of the original JSON Viewer by Tulio Ornelas, updated to work with modern browsers (Manifest V3). Features: - Syntax highlighting with 27 built-in themes - Collapsible/foldable nodes - Clickable URLs within JSON values - Line numbers - Search within JSON content - Sort keys alphabetically - Works with JSONP responses - Handles numbers larger than Number.MAX_VALUE - Customizable tab size, themes, and CSS - Omnibox integration: type "json-viewer" in the address bar to format JSON or open a scratch pad - Configurable max file size for highlighting The extension only activates when it detects JSON content. It does not collect any data. Source code: https://github.com/rxliuli/json-viewer Original project: https://github.com/tulios/json-viewer