Super CSS Inject icon

Super CSS Inject

by Nelson Rodrigues · Developer Tools
Manifest V3 Free
View in Chrome Web Store Data as of 15 Oct 2026

Keep multiple stylesheets ready to inject and change on the fly!

Users
1,000
0 in 30 days
Rating
4.3 / 5
unchanged in 30 days
Ratings
12
0 in 30 days
Store rank
#26K
#21K among extensions
Version
1.5.0
updated 26 Mar 2025

Users

monthly, 3 years
3001,6503,000Aug 2023Apr 2025Oct 2026
Latest, 15 Oct 2026: 1,000 usersMove the mouse over the chart for any month

Ratings count

monthly, 3 years
3812Aug 2023Apr 2025Oct 2026
Latest, 15 Oct 2026: 12 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 Super CSS Inject

This extension allows you inject an external CSS stylesheet into a page via URL. The extension allows you to keep an list of multiple CSS stylesheets ready to inject so it's easier to toggle between them when working in multiple projects. The extension also works with LiveReload so you can work on the CSS without having to reload the page. 2025-03-21 Update - Add a new option to configure the URL used for the LiveReload WebSocket server 2024-03-23 Update - New short name feature. Add alias to your stylesheets! - Minor UI improvements. 2022-11-10 Update - Fixed a bug that caused the extension to stop responding due to the service worker inactivity; - Improved behaviour in SPAs (the extension now tries to always keep the injected style sheets in highest priority); 2022-10-13 Update - Allow multiple injected stylesheets per tab; - Easily rename existing stylesheet URLs in the Options page; - Added links to the stylesheet URLs in the Options page; - Added URL validation in the Options page; - The search input in the Popup it's now displayed earlier (6 or more items). 2020-05-31 Update - Added search in popup to easily filter larger lists (> 8 items); - Fixed overlapping bug in options page. 2020-03-16 Update - Improved the listing to work with larger stylesheet names. 2019-08-06 Update - Added popup to easily change between active stylesheet without having to open the Options page; - Now you can have an different active stylesheet per browser tab; - The list of stylesheets is now sorted alphabetically.

Growth

WindowUsersChangeRatingsRating
7 days0+0.0%00.00
30 days0+0.0%00.00
6 months0+0.0%00.00
1 year0+0.0%00.00

Chrome Web Store search rankings

Where Super CSS Inject appears when people search the store, with the 30 day change
Search phrasePosition30 days
inject#3−2
super#24−8

Version history

5 versions recorded
1.5.026 Mar 2025
1.4.024 Mar 2024
1.3.111 Nov 2022
1.3.014 Oct 2022
1.2.031 May 2020

Details

Category
Developer Tools
First seen
31 May 2020
Size
125 KB
Languages
en
Pricing
Free
Support
github.com
Extension ID
pcfpmmmjdgngeidaggcahhoncahmpiin

Permissions and risk

Low riskimpact 1, likelihood 1
Permissions
activeTabstorage

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