CSS Peeper
Developer Tools
FreemiumConfidence 64
Inspect website styles in seconds. Supercharge your workflow, and save hours of work.
Users
400K
Rating
4.1
Reviews
474
7D Growth
0|0%
Stable signalUnknownMedium-risk permissions
Debug CSS
When enabled adds outline to all elements on the page, Hold Ctrl and hover to get more detail
Users10KCurrent public install base
Rating4.5Store average score
Reviews48Public review volume
Manifest versionV3Extension platform version
7-day growth0Net users gained this week
7-day growth rate0%Relative weekly velocity
Preview
2 assetsDebug CSS Media preview
Trend
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User Growth Over Time
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7-day rating change
Start
4.45
Latest
4.46
7-day rating change
+0.01
2026年7月15日2026年7月21日
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1-day growthFlat
00%7-day growthFlat
00%30-day growthFlat
00%Technical snapshot
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Version1.5.12
ManifestV3
Size17.52KiB
Languages1English (United States)
Published
Store updated
Last crawled
English (United States)
Overview
Product summary
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# Release notes
In the latest version we have addressed the issue where the extension stopped working after mandatory `manifest_version upgrage` from Google.
also, we have addressed the issue in which user were unable to see the styling for the bottom most element of the page. we have added tooltip feature which gives a basic styles in tooltip itself.
# Debug CSS
A lightweight extension for Google chrome to show outline of all the element exist on page.
while working on web page development the one of the difficult part is to position the element as required and check which element affecting the other one.
Reviews
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Store average score4.5Chrome Web Store aggregate rating, including ratings without synced review text
Synced text average4.3Average computed only from synced review bodies below
Reviews with text40Synced review bodies
Total ratings / reviews48Chrome Web Store public rating/review count
Store average score: 4.5. The bars below are calculated from synced review text only, so they may be empty for extensions that have public ratings but no synced comments yet.
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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.
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?
I like this extensions but is it not working anymore? I try on chrome and edge it can't be used
Excellent extension but it recently broke for latest Chrome versions, can't wait for the developer to fix it :) !
Is it no longer available? the most useful extension I have ever used
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. UPDATE!!! It seems this problem only exists on chrome. On firefox it works flawlessly
Great tool but it recently stopped working :( It works very briefly every time I update my browser and then stops working again.
On my latest chrome(133.0.6943.127), it stopped working, sadly
not working in chrome as well please do workable it
I am using Edge browser and this extension stopped working since 18 Feb 2025.