CSS and Javascript Injection
Malware Detected
This extension has been flagged as potentially malicious.
Extension Delisted
This extension is no longer available in the official store. Delisted on 2025-09-15.
This plugin will remember all css/js code you injected in every website and auto-inject them when web page is loaded
You can inject css/javascript code to web pages with this plugin.
And it will remember the code you injected for different websites.
Finally, these code will be auto-injected next time you open the website.
The code pieces are grouped by host.
The source code is hosted in github: https://github.com/comcaptain/chrome_plugins. You can submit bugs there.
1.0.5 update:
1. fix ace editor redraw bug
2. now js will only be executed when page is loaded
3. add external css resource tab:
urls are seperated by line
you can use alias for url, now there's only one alias(bootstrap -> https://maxcdn.bootstrapcdn.com/bootstrap/3.3.4/css/bootstrap.min.css). Contact me if you have other need for alias([email protected])
4. now js will be executed before the page is fully rendered to avoid FOUC
5. now you can inject jquery code in pages without jquery(jquery-2.1.4)
version 1.0.6 update log:
1. guarantee injected css/js appear after original page's css/js references in head tag
2. fix updateCss execution timeline
3. fix bug: do not update css after css text is cleared
Latest reviews
greate extention
Thank you ! Work perfectly :)
Great but can you make it that the javascript get injected at the end of the page?
love it. but can we know where you save the scripts we write? a website changed it's url and i lost it's script.
This tool works as it should. Love it.
Muito valioso!
Helped a lot in automating stuff
Beautiful; does what it's told. Best one I've used so far. Lacks a default function but, if you leave your stock standard neatly packed, it's a simply copy paste.
soooooo gooooooooood
Супер! Просто, зрозуміло і працює відмінно!
Great App.. Works great, even on Banking websites... Would love a larger window or re-size ability.
please add feature to export setting that will usefull when i got uninstalling this extension, we just import again setting file then we should'nt copy a code one-by-one, for currebt websites that i just inject
Hey great addon, but where is my code stored as apparently facebook has changed their url (redirecting now to web.facebook) and the extension is no longer loading mycode on the new url
Does exactly whan has been need. Excellent!
Amazing plugin!
The best CSS and JavaScript injector extension available!
the best i have seen
not acivating my js
Good
Would be great if it support jquery too :) But excellent as is for CSS/JS
Stopped to work correctly. Custom CSS vanishes after closing the popup, and opening it back. Every time I need to retype the custom CSS.
Extremely useful for editing downright ugly sites you are forced to use or to highlight a specific part. Would love to easily export the injections I made to various sites in bulk instead of having to remember what sites I modified and copying from the little tab.
This Chrome extension worked perfectly to get rid of an annoying "People also search for" box when using Google's Search feature. Thank you for this invaluable add-on.
Just Great! It will be great if I have someway to sync code, so we do not loose in future.
I use it to fix some annoying CSS issues in Gmail web interface. I'm amazed by it's smoothness. I haven't tried JS injection though, just CSS, but it's really potent. Great job!
Increíblemente útil y práctico.
Berguna bagi front end @waqid
Très bien.
Simple and effective.
It says it's compatible, but JS injection doesn't work on chromium, on ubuntu. After refresh only the first line of code remains.
It deleted it when i close the tab, but its a very nice extension
Works perfectly! Very useful to me. Can you add an option to show the code/domain, written in the past?
very useful!
The way it manage which website is easy. 5 star for that. And the CSS is live update (no need refresh). 5 star for that too. But I would like to edit in new tab for larger CSS/Script and to avoid the 1sec open popup delay
Work well! However could it be show CSS and JS at the same time instead of tab? Or it would be so perfect if it have an option to setting what tab can be set as default/focus/active Thanks!
Love this. Works awesome! Thanks!
Very nice! But is it possible to make the plugin window larger? Like 1000x1000 at least? Thank you.
Generally really good. There seems to be some kind of arbitrary character limit. Is there any reason why scripts are capped? Is this a setting that can be overriden somehow?
