A Chrome extension that helps you visualize and debug layouts by adding outlines to elements.
Users
67
+11 in 30 days
Rating
5.0 / 5
unchanged in 30 days
Ratings
1
0 in 30 days
Store rank
#97K
#81K among extensions
Version
1.1
updated 8 Apr 2025
Users
monthly, 2 years
Latest, 16 Oct 2026:67 usersMove the mouse over the chart for any month
Ratings count
monthly, 2 years
Latest, 16 Oct 2026:1 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 Layout Pest
Layout Pest is a useful tool for web developers and designers that helps visualize and debug page layouts by adding colorful outlines to all HTML elements. This extension is inspired by the popular Pesticide extension.
Key Features:
• Instantly toggle colored outlines around all HTML elements on any webpage
• Interactive hover effects that highlight specific elements you're examining
• Detailed tooltip showing element information including:
- Element tag, ID, and classes
- Exact dimensions and position
- Margin, padding, and border values
- Z-index and display properties
- Complete CSS selector path
• Customizable outline thickness (1-5px)
• Badge indicator shows when the extension is active
• Zero impact on page performance when disabled
Perfect for:
• Frontend developers debugging layout issues
• Web designers checking element spacing and alignment
• CSS troubleshooting and development
• Teaching and learning about HTML structure
• Responsive design testing
Layout Pest is lightweight and easy to use. Simply click the extension icon to toggle outlines on any webpage, or use the context menu for additional options.
Privacy Note: Layout Pest operates entirely within your browser and doesn't collect any data or require any special permissions beyond what's needed to function.
Growth
Window
Users
Change
Ratings
Rating
7 days
−13
−16.2%
0
0.00
30 days
+11
+19.6%
0
0.00
6 months
+21
+45.7%
0
0.00
1 year
+43
+179.2%
0
0.00
Chrome Web Store search rankings
Where Layout Pest appears when people search the store, with the 30 day change