Instantly debug CSS layouts by adding colorful outlines to HTML elements. Easily identify and inspect elements with a simple click.
Users
740
+50 in 30 days
Rating
5.0 / 5
unchanged in 30 days
Ratings
4
−1 in 30 days
Store rank
#36K
#30K among extensions
Version
1.0
updated 10 Mar 2025
Users
monthly, 2 years
Latest, 15 Oct 2026:740 usersMove the mouse over the chart for any month
Ratings count
monthly, 2 years
Latest, 15 Oct 2026:4 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 CSS Debugger
This extension, is designed to simplify CSS debugging and layout inspection. It instantly adds colorful outlines to HTML elements, making it easy to visualize and identify different elements on a webpage.
The extension solves the common problem of struggling to understand the structure and layout of a website. Instead of manually inspecting elements in the browser's developer tools, this extension provides a quick visual overview of the page's underlying structure.
When the extension's icon is clicked, it injects a script into the current tab that toggles the CSS outlines. The script uses predefined color mappings for different HTML elements, and it dynamically generates and injects CSS rules to apply the outlines.
It functions similarly to the old Pesticide extension but is compatible with Manifest V3. The source code contains no third-party dependencies.
🌐 Open source repository: https://github.com/aydgn/css-debugger-extension
Growth
Window
Users
Change
Ratings
Rating
7 days
+3
+0.4%
0
0.00
30 days
+50
+7.2%
−1
0.00
6 months
+205
+38.3%
−1
0.00
1 year
+424
+134.2%
−1
0.00
Chrome Web Store search rankings
Where CSS Debugger appears when people search the store, with the 30 day change