Developer Tools

Debug CSS

By Joshi Enterprises

When enabled adds outline to all elements on the page, Hold Ctrl and hover to get more detail

View Chrome Web Store

Time on the storeAbout 3 years or moreA rough range, not an exact date

Store users≈10KRounded by the Chrome Web Store

Chrome Web Store rating4.5 / 548 ratings on the Chrome Web Store

Last store update14 Mar 2025Version 1.5.12, 19 months ago

Inside the extension

Product image 1 of 1

Reviews

Joshua Ford18 months ago
I used Pesticide but the original version cant be installed anymore and the updated replacement is just..not for me (ugly solid colored blocks), or others based on the flood of bad reviews. Looking for alternatives on a new Chrome install, I tried Debug CSS. So far, its awesome. Almost exactly the same as Pesticide in functionality and how it looks when debugging. At least as far as the basic putting boxes on all elements on the page so I can see how things flow together. I had zero problems installing and running it as of April 25, 2025. If you are one of the forlorn Pesticide refugees, give this extension a try. It solid and made me very happy.
Vishwanath Veerni19 months ago
This extension is useful but as of March 2025 why does it suddenly need permission to "Read and change all your data on all websites" when it required none previously?
Adam Abdillah19 months ago
I like this extensions but is it not working anymore? I try on chrome and edge it can't be used
Lethargic20 months ago
Excellent extension but it recently broke for latest Chrome versions, can't wait for the developer to fix it :) !
AlexSearch20 months ago
Is it no longer available? the most useful extension I have ever used
Charles20 months ago
Giving it a 4 star because I have used this extension for years and now for some reason, it breaks whenever I reload the page.
Bee20 months ago
Great tool but it recently stopped working :( It works very briefly every time I update my browser and then stops working again.
Gordon Su20 months ago
On my latest chrome(133.0.6943.127), it stopped working, sadly
Aman Swarnakar20 months ago
I am using Edge browser and this extension stopped working since 18 Feb 2025.
Muhammad Ishaq20 months ago
not working in chrome as well please do workable it
Tin Tran20 months ago
19/02/2025. It don't work in edge browser
Arthur Marchand23 months ago
Superb, works like a charm
Bhupen Pal2 years ago
The extension is great. But it would be even better if the dimensions of each box is shown on top of the boxes.
Speedx77x22.2 years ago
Works but if you aren't seeing the black bar at the bottom telling you what you're hovering on you have to inspect and under styles in the tools uncheck the visibility css attribute. For whatever reason it is defaulted to hidden. Very dumb.
Senura Chamod2.5 years ago
I'm a Mac User. If anyone has an issue that feels not working/ hovering effect not works even Debug CSS active, You have to do a simple thing. Go to manage extension --> Turn ON "Allow access to file URLs".