Not only inserts outlines (without background color) on all elements, but also inspects size and layout. CSS is awesome!
Users
20K
0 in 30 days
Rating
4.9 / 5
+0.04 in 30 days
Ratings
100
+1 in 30 days
Store rank
#5,626
#4,819 among extensions
Version
3.2.0
updated 26 Mar 2026
Users
monthly, 2 years
Latest, 15 Oct 2026:20,000 usersMove the mouse over the chart for any month
Ratings count
monthly, 2 years
Latest, 15 Oct 2026:100 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 Pesticide - Advanced CSS Debugger
Pesticide 3.2 is an advanced CSS debugger for Chrome that helps you inspect layout, spacing, typography, and computed styles directly on the page.
Turn it on and hover any element to open a floating inspector with the details you actually need:
- Element tag, id, and classes
- DOM path
- Client / offset / scroll dimensions
- Full box model: margin, border, padding, radius, and content size
- Font inspection
- Computed CSS properties
- Copy CSS output in Tailwind, inline, or block format
What makes Pesticide useful:
- Outline-based debugging without shifting layout
- Click to pin the current element while comparing spacing and styles
- Resizable, draggable inspector overlay
- Per-site saved panel position and size
- Options page to show or hide inspector sections
- Quick keyboard control with Ctrl + Shift + P
Pesticide is built for front-end developers, designers, and anyone debugging tricky CSS. It gives you a fast visual way to understand how a page is built without opening heavyweight tools for every small layout check.
Version 3.2 highlights:
- Better floating inspector workflow
- Copy CSS panel with Tailwind, inline, and block output
- Font and computed-style inspection
- Configurable inspector sections from the options page
If you want a lightweight Chrome extension for faster CSS debugging, Pesticide is built for that job.
Growth
Window
Users
Change
Ratings
Rating
7 days
0
+0.0%
0
+0.04
30 days
0
+0.0%
+1
+0.04
6 months
0
+0.0%
+16
+0.05
1 year
+10K
+100.0%
+39
+0.05
Chrome Web Store search rankings
Where Pesticide - Advanced CSS Debugger appears when people search the store, with the 30 day change