extension ExtPose

User CSS

CRX id


Description from extension meta

A quick and easy way to add custom CSS to the current web site.

Image from store User CSS
Description from store Insert your custom CSS code to the current web site and you will see the changes immediately. How to use: 1. Press the extension button to display the CSS editor. 2. Write your custom CSS. 3. Enjoy the result. 4. Press the extension button to hide the CSS editor. Button shows a green indicator, when current web site has custom CSS. The extension uses CodeMirror to highlight code and supports the Emmet toolkit.

Latest reviews

  • (2021-09-12) William Angel: Justo lo que necesitaba para personalizar ciertas página que visito regularmente y deseo quitar ciertos elementos o cambiar ciertos colores. El css que se escribe en la web queda guardado y se ejecuta cada vez que se carga la página. Excelente.
  • (2021-09-10) kankara: Not work.You should not use it...
  • (2021-08-22) Chris Huebsch: Does not work. :-(
  • (2021-07-22) Max Z: работает! найс!)
  • (2021-07-12) Tinny: Not working at all
  • (2021-07-12) DevPixels: It is very helpful to do some CSS Stuff. Because it is real time. but if i style span tag. Script Editor will got style too. I hope Developer will fix this soon :)
  • (2021-06-21) Shadow Gamer: It was pretty gud, yep it works fine.
  • (2021-06-13) Mohammed Zayyan: it works perfectly for me
  • (2021-05-04) Gábor Lippert: Works beautifully. 👍
  • (2021-02-01) Jeff Taynton: Not working. jQuery error.
  • (2021-01-05) Nathan Perry: Unfortunately, it does not appear to work.
  • (2020-12-15) Артур Майер: легко просто и удобно!
  • (2020-12-10) Wouter Smet: Hello to the author! First of all, love this! Question: could you make this work with iframes please, since it currently seems it doesn't? (even if they are on the same domain) If you use content scripts I think you can set '"all_frames": true in your manifest and then I think you can access frames embedded within the site too.
  • (2020-12-03) Ellie Ng: It seems like it should work, and the options site is pretty easy to understand and is well designed... but I can't access the actual extension. Whenever I click the extension icon, nothing happens :(
  • (2020-12-03) Роман Севрюк: Работает, но только после закрытия и открытия браузера. До этого при нажатии ничего не происходило, и я минут 10 пытался это расширение запустить. О таких вещах нужно предупреждать, лучше крупным шрифтом.
  • (2020-12-01) Anand Arokianathan: This extension has a bug which delects the CSS after some tie automatically so i have to store the CSS somewhere else.....if you can fix the bug its an awesome product.
  • (2020-11-09) Charlie Harding: Does not work on pages without jQuery
  • (2020-11-07) Timothy Smith: Easy and awesome
  • (2020-11-06) 신민재: garbage
  • (2020-10-19) Toàn Nguyễn: No-frills and lightweight. Thank you!
  • (2020-09-30) דניאל לביא: A+
  • (2020-09-05) Mehran Hooshangi: awesome
  • (2020-07-29) Gabriel Alejandro Zorrilla: Not working!
  • (2020-04-13) Priboy313: Полностью игнорирует сайты Яндекса. И что это за прогиб? Не то что рекламу, стиль текста заменить на удобоваримый нельзя - окно редактора просто не появляется. В остальном работает хорошо.
  • (2020-04-06) Govind Tiwari: Not working please check
  • (2020-03-26) The extension requires jQuery dependency that it assumes is on the page. Should not require a script library to accomplish its goals. Many modern websites do not need jQuery due to the vast improvements made to vanilla JS. Please consider refactoring the extension to remove library dependencies.
  • (2020-03-12) Hussein AL-Mosawi: I downloaded it and was happy to try it but when clicking on it nothing happens! Because it doesn't work without jQuery
  • (2020-03-08) Milan Kragujevic: Does not work, shows a jQuery error in the console when trying to open the dialog.
  • (2020-02-04) Heck Fy: good extension, but i think that it loads too lately, and because of that it FOUCs on some sites
  • (2020-01-07) Sławek S.: Kompletnie nieintuicyjne, nieprzydatne bo zwyczajnie nie działa. No może działa, tylko nie mam pojęcia jak tego używać, bo zgodnie z instrukcją nie robi nic.
  • (2019-12-13) João Paulo: Muito bom e útil pra remover propagandas ADS. Very good and usefull to remove ADS
  • (2019-10-23) Lighty Ponce: Great extension tbh, wish it had autocomplete though
  • (2019-09-05) Miguel Sánchez Martín: It requires that the website uses jQuery but does not specify that requirement in the extension description
  • (2019-08-08) Nicolai Weitkemper: Funktionierte auf StackOverflow und YouTube, aber Reddit lässt sich nicht laden, solange die Erweiterung aktiviert ist.
  • (2019-07-20) Cesar Vidril: Throw a lot of error when button is pressed: Uncaught ReferenceError: jQuery is not defined.
  • (2019-06-17) David O'Donovan: It no longer works with google docs.
  • (2019-05-26) George Beckingham: Press the button, nothing happens. Is Google disabling extensions left and right?
  • (2019-05-19) mutiny lisa: Its code is relatively nice, the issue is, It doesnt work... I press the button on every website ive tried, waited up to 10 minutes, the UI never appears... Im very saddened now :(
  • (2019-05-08) Luky Wang: It's very cool, but version 2.2 not working on chrome 74.0.3729.131, it says "jQuery not found"
  • (2019-04-11) Damir Males: Rien ne se passe au clic sur l'icône
  • (2019-04-01) Doesn't work with optimised styles (many elements assigned to one atribute).
  • (2019-03-15) xandeadx: Перестало работать в новом хроме
  • (2019-02-28) Cory Roberts: Not a very good plugin - when you resize the page to work on custom CSS on a resized Window, it resizes the editing box so small you can't read anything.
  • (2019-02-12) ElementalX7: Doesn't work. When I click on {CSS} icon on toolbar, nothing happend. The same in options. can't add website, change settings etc. The same on clear Chrome Dev.
  • (2018-12-20) Henrique: Didn't work on Vivaldi Browser When the extension's button is clicked, no css editor window show up.
  • (2018-12-12) Henry Foster: This is awesome! It works perfectly, and it is so easy to use. Thank you!
  • (2018-12-03) Yurii Lytvynchuk: Simple and useful for UI testing.
  • (2018-12-02) Broken.
  • (2018-11-15) Kirill: Installed this also in Blisk browser. So far works nicely. I like that it's simple and intuitive and does what it should: allows me to set custom css for a particular websites.
  • (2018-11-14) Антон Швец: вообще не работает, нет окошка правок css, не отображаются импортированные

Latest issues

  • (2021-04-06, v:2.2) Joshua (Stroud) Pelton-Stroud: Uncaught ReferenceError: jQuery is not defined at VM5553 scripts.js:315
    Anybody figure out a workaround for sites that aren't already using jQuery? I was really excited when I found this extn, but my problem sites aren't using that library :(
  • (2021-02-20, v:2.2) Laurentiu Macovei: jQuery is not defined!
    It doesn't work any longer!
  • (2021-02-03, v:2.2) Etienne Maheu: Crash while looking for jquery
    After installing the extension, clicking on the icon will trigger an error "jQuery is undefined" in the dev console. This completely breaks the extension.
  • (2021-02-03, v:2.2) Khánh Nguyễn: i cant use
    i cant open it
  • (2020-09-16, v:2.2) Unslaved _: Differentiate domains and ports
    Currently the port is ignored. So the same css is applied to example.com as well as example.com:8080. It would be a great improvement if the port is considered too.
  • (2020-08-02, v:2.2) Ano Nym: Doesn't work on sites with framesets.
    When I click on the CSS button, nothing happens.
  • (2020-08-01, v:2.2) Robby Bennett: Hide website until the custom user CSS has loaded
    This would make the extension look a lot better. Basically, it could use Javascript to make the whole page be hidden or transparent, then it would wait until the page is loaded, then user CSS will be injected, then make the page visible again. Please add this as an option.
  • (2020-07-03, v:2.2) Ivan Tarazevich: CSS для всего браузера
    Добрый день! Данным расширением можно сделать свой css который будет всегда подгружаться браузер при просмотре любой страницы? В общем нужно чтобы мой css всегда сидел в бразуре. Или предусмотреть в вашем расширении переключатель который будет включать так сказать "сквозной" режим работы css введенного пользвоателем.
  • (2020-06-09, v:2.2) Chen: Live file updates
    Hello, I'd like to suggest an option where you can input a local file on your filesystem to a custom css file, and as you save it in your editor, it will update live on the page you are editing
  • (2020-03-23, v:2.2) em: Images won't load
    Hi, I am using User CSS to create a custom theme for a website. However, whenever I visit the website, none of the images I use will load unless I open the CSS editor. I am using them in this manner: background-image: url("https://i.postimg.cc/Z5B2yQ0R/tancssfolder.png"); Please advise? Love the extension btw!
  • (2020-02-13, v:2.2) Michael: Keyboard shortcuts
    I'd like to be able to turn on/off the extension's css effects with my keyboard. Is this possible?
  • (2019-12-17, v:2.2) Элина Айрапетян: не работает
    не нажимается и не открыват панель
  • (2019-12-03, v:2.2) Dimiter Simov: It does not work
    I was not able to start it on Chrome Version 78.0.3904.108.
  • (2019-10-26, v:2.2) Marwan Abdessalem: Make site's styles unique by domain as well as the port number
    Styles that are set for the site http://localhost:3000/ should be accessible by http://localhost:8000/ or http://localhost/
  • (2019-06-20, v:2.2) Noel Németh: Less CSS support
    It would be good if it would support Less CSS
  • (2019-05-16, v:2.2) Arthur Mougin: jquery error
    hi, clicking on the app icon show a warning saying that jquery dont exist. That might be the reason why the app doesnt work
  • (2019-05-11, v:2.2) Muhamad Basyir Bin Mat Nawi: How to export configuration data?
    I seems I was unable to click the export button. The export button doesn't work. It is not clickable.
  • (2019-02-22, v:2.2) Mihai Stanescu: Automatically activate the extension
    Hi, Is it possible to automatically activate the extension? I have to click the thing all the time
  • (2018-11-28, v:2.2) jQuery is not defined error
    I'd suggest adding a fallback to '$' if jQuery wan't found. And perhaps for future versions add a jQuery dependency for the plugin, so it can work on any website, regardless of what technologies they are built on Thanks!
  • (2018-11-11, v:2.2) Vlad Svoka: CSS inside iframes are not affected
    So I have a site, it has iframe of itself <iframe src="/api/v2/page"></iframe> Styles are not applied inside of it. Problem is generic. I want to customize how iframes with specific srcs are displayed
  • (2018-07-01, v:2.2) Matteo Chiari: Not working as of 1/7/2018
    CSS Editor does not open on any page
  • (2018-01-29, v:2.2) Lance E Sloan: simpler active toggle?
    One change I'd like to see is that a click on the extension's toolbar icon should toggle the "on/off" state. A different combination (like control-click or shift-click) could open the editor panel instead.
  • (2018-01-16, v:2.2) Cody Nichols: iframe
    On my university's LMS, they use iframes for a lot of things. If I look at the source i can change css properties of the elements inside of these iFrames. But i can't seem to get the User CSS to be able to select the objects inside of them. Is there anyway around this?


40,000 history
3.8 (201 votes)
Last update / version
2017-10-23 / 2.2
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