Custom Style Script
Developer Tools
Add Custom JavaScript (JS) Code or Styles (CSS) to any page.
Users
10K
Rating
4.2
Reviews
42
7D Growth
0|0%
Stable signalNo paid features detectedMedium-risk permissions
User JavaScript and CSS
User JavaScript and CSS on any website
Users200KCurrent public install base
Rating4.8Store average score
Reviews657Public review volume
Manifest versionV3Extension platform version
7-day growth0Net users gained this week
7-day growth rate0%Relative weekly velocity
Preview
4 assetsUser JavaScript and CSS Media preview
Trend
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User Growth Over Time
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7-day rating change
Start
4.75
Latest
4.75
7-day rating change
0.00
2026年7月15日2026年7月21日
Growth overview
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1-day growthFlat
00%7-day growthFlat
00%30-day growthFlat
00%Technical snapshot
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Version3.1.2
ManifestV3
Size1.72MiB
Languages2English / русский
Published
Store updated
Last crawled
Englishрусский
Overview
Product summary
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Userscript's and userstyle's — simple extension to inject own JavaScript or CSS rules to any page.
Features:
- Instant execution
- Custom libs include
- URL masking allows use one script or CSS on many pages
Documentation:
Reviews
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Store average score4.8Chrome Web Store aggregate rating, including ratings without synced review text
Synced text average4.7Average computed only from synced review bodies below
Reviews with text472Synced review bodies
Total ratings / reviews657Chrome Web Store public rating/review count
Store average score: 4.8. 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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Great extension! Any chance it will ported to Firefox?
The modern Tampermonkey.
As a novice web front-end developer, using this plugin allows me to make the page structure clear and visible, truly saving my day!
Cumpre totalmente a proposta!
I freaking LOVE this! It is great for development, but i have used it quite a few times to correct or improve code on sites that i need to use. Such as, when they have an iframe that is too short.
Great.
Tried a few extensions for custom user stylesheets and this one was the clear winner. Very well-designed.
I would be lost without this fantastic extension. I've used it for years now, and very much appreciate the efforts of the developer in keeping this tool clean & simple, and yet somehow managing to progressively improve it without bloat. I do AB testing on multiple clients and this tool allows me to rapidly develop my tests locally before deploying to the various testing tools I use. The recent UI updates are top-notch and the new features especially the improved editor & SCSS are great.... and I rarely think this about UI revisions! I highly recommend and thank you again to the developer... keep up the good work.
Расширение прекрасное! давно использую! Но появились 2 проблемы после обновления: 1) не правильное закомментирование css (// вместо */) 2) периодически отскакивает курсор вниз при наборе кода что css, что js Убедительная просьба исправить! Давно работаю с вашим расширением, сейчас доставляет массу сложностей..
This extension saved my sanity again! Usually I test out client site changes on-the-go in my own local rules, but today did something for myself. Seems Microsoft support can't keep up with Microsoft developers in their changes, so the "show blocked content" must be clicked for every new email. Now, this extension lets me inject the code to handle this for me on any new email. I look forward to the newest version to be fully released for all as I still only have the cloud storage rules on one of my computers.