Custom Css Pro

Custom Css Pro

by flowzy

Add custom CSS code to your website

4.8 of 5 stars(27 reviews)

Quick and easy setup

Launch a CSS editor in just a few clicks. Does not require any configuration. Our app is truly compatible with ALL themes.

No risk of damaging your store

There is no need to edit any of the source files of your theme. Which means you avoid the possibility of damaging your website.

Test your changes

Use our app to work on an unpublished theme and test your changes there before going live. Publish your changes when you are ready.

About Custom Css Pro

Get your Shopify website to look exactly how you want it to without having to delve deep into its backend to modify the source files. Here at Flowzy, we have developed a unique solution for Shopify that allows anyone with knowledge of CSS code to quickly and easily change how their Shopify website looks.

The Custom CSS Pro app loads directly into Shopify admin as a simple editor that allows you to use CSS code to hide elements, change fonts, colors or styles on any of the pages. With this tool, any Shopify store administrator can use CSS to override the default theme style without the need to edit any of the theme files, which means you don’t risk damaging your website.

For those looking for further control over their Shopify website, the Custom CSS Pro app offers features such as a user-friendly code editor with syntax highlighting on the fly, code folding, matching parentheses highlighting and cut, copy, and paste functionality. What is more, in our paid version you can take advantage of being able to edit any available theme on your store before you go live. This lets you test out any changes that you want to make and see exactly what they would look like to your customer. Once you are happy with how the shop looks, you can publish the changes and let the world see the magic you have created!

The installation of the Custom CSS Pro app is super quick and doesn’t need any configuration. Once it is loaded, just open Custom CSS Pro and make any changes to your site that you want to.


If you want to uninstall the Custom CSS Pro app for any reason (we hope this won’t be the case!), make sure to remove all of the CSS code you have added to your website with the app before you uninstall the application.

Media gallery


Pricing 3-day free trial

Standard plan


  • Apply CSS changes to the published theme of your store

Plus plan


  • Apply CSS changes to all themes of your store
  • Priority Support

* All charges are billed in USD.
** Recurring charges, including monthly or usage-based charges, are billed every 30 days.

4.8 of 5 stars

The overall rating reflects the current state of the app. It accounts for all app reviews but prioritizes the most recent ones.

  • 5 of 5 stars
    85% of ratings are 5 stars
  • 4 of 5 stars
    4% of ratings are 4 stars
  • 3 of 5 stars
    7% of ratings are 3 stars
  • 2 of 5 stars
    4% of ratings are 2 stars
  • 1 of 5 stars
    0% of ratings are 1 stars

Most recent reviews

I use this app on 3 websites to add custom CSS. I know CSS but I am no where near expert level, and using this app makes me feel more comfortable making edits because I don't have to change any theme files. The changes are instant. The few issues I've had are due to Chrome not clearing the cache. I will be creating more websites and I am sure that will use this app on all of them.

Developer reply

October 7, 2021

We really appreciate your kind words!!! It's a pleasure for us to hear you liked our app so much :)


This is really good. I use it to get the most out of the build in free themes and they have ended up looking nothing like the originals just with a few lines of CSS. There is no consistency checking, but as long as you know what you are doing and can spot missing "}"'s when you are updating code then you should be fine!

Developer reply

September 13, 2020

Thank you for your review. We appreciate your feedback!

Go Smart Blinds

deserve 5 stars and more,,, it's very important for all stores ..I recommended strongly .one of the best apps

Developer reply

July 19, 2020

Thanks a lot for your kind words! We really appreciate it. :)