User JavaScript and CSS
Developer Tools
User JavaScript and CSS on any website
Users
200K
Rating
4.8
Reviews
657
7D Growth
0|0%
Stable signalUnknownMedium-risk permissions
Live editor for CSS, Less & Sass - Magic CSS
Live preview of CSS/Less/Sass code changes. Auto-save file, autocomplete, Less/Sass to CSS, beautify, CSS reloader, lint, ...
Users60KCurrent public install base
Rating4.6Store average score
Reviews280Public review volume
Manifest versionV3Extension platform version
7-day growth0Net users gained this week
7-day growth rate0%Relative weekly velocity
Preview
2 assetsLive editor for CSS, Less & Sass - Magic CSS Media preview
Trend
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7-day rating change
Start
4.63
Latest
4.63
7-day rating change
0.00
2026年7月13日2026年7月19日
Growth overview
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1-day growthFlat
00%7-day growthFlat
00%30-day growthDeclining
-10K-14.3%Technical snapshot
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Version8.22.5
ManifestV3
Size2.15MiB
Languages1English
Published
Store updated
Last crawled
English
Overview
Product summary
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Run this extension and start writing your CSS/Less/Sass code which gets applied immediately. The code you write will be saved in the browser extension's storage space or the site's local storage.
Featuring:
✓ Live editor for CSS/Less/Sass code - Preview changes as you write code
✓ Autocomplete
✓ Live edit CSS files and auto-save on file system
✓ Open code editor in external window
Reviews
Recent review snapshot
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Store average score4.6Chrome Web Store aggregate rating, including ratings without synced review text
Synced text average4.6Average computed only from synced review bodies below
Reviews with text184Synced review bodies
Total ratings / reviews280Chrome Web Store public rating/review count
Store average score: 4.6. 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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初次尝试，感觉不错
Love the idea, but SASS isn't working :(
It's okay but it does not work with every site (does not open). Sadly this is the case for a site I need to edit colors on since I'm colored blind. Edit: I don't know what details you want. I already explained that your app does not open on all sites.
Basically I've been looking for a custom CSS injector and this is really great for that because I can't remember any of the syntax/keywords and have to use trial and error. The selector selector is a plus
Loved It
Injects itself into the page which can cause various type of conflicts. Not the best decision. Would have been great extension otherwise.
Great app. Works like a charm. sometimes the predictions feel awkward as they block your typing. But thats fine. Btw if you can spend a minute and change the icon color in Chrome toolbar. it would be great. The Chrome toolbar is white and the icon color is also white. So it appears empty there and makes it hard to recall what extension is actually there.
top!
Really the best one. Thanks for useful tool!
After turning on "Allow access to file URLs" in the extension's options, when I try to enable "apply style automatically" on a local html file, thee extension returns the following error: "you need to provide permissions to reapply styles automatically." I'm not sure what it means by that, as the statement is very vague. I believe it used to be able to do this, so I'm guessing something changed in Chrome's security model, since I last used this functionality.