Best Shopify Apps

Best Shopify Apps For CSS Editor 2025

We know that, as a busy eCommerce store owner, it is a tedious task to find the best apps to optimize your Shopify store.
So our team deeply researched and found helpful CSS editor apps for Shopify and listed all the details with pros, cons, and pricing here.
So without wasting time, explore the list below.

3 Best CSS Editor Apps for Shopify

Appy: Sales Announcement Bar

by Appy Design

[10]

Free plan available

Timers, email sign ups, custom CSS, advanced page targeting and much more.

Connect with your customers, push promotions and drive sales with discounts and offers all without development time. Get ready for the sales seasons ahead and push your sales or capture additional email leads all in one place with features you'd normally have to pay for free. You can create a banner in less than 30 seconds and have it shown across your whole website. Custom CSS is included in the free tier to match your banners to your brand easily.

Key features of the app:

Auto-schedule banners to go live when you like automatically.
Drive email signups by offering discounts for signing up.
Set countdown timers to push urgency of your messaging and offers.
Advanced display rules to show different banners on certain pages.
Custom CSS is available for free to match your brand.

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F: Theme Access : Insert Code

by Final Apps

[4]

Free plan available. Free trial available.

Easily insert theme sections with CSS / JS , insert script or code to any theme. Theme Scheduler

Schedule Theme or Insert custom HTML/CSS/Javascript code or script to theme sections with this app. Store merchants won't need to edit liquid code file and mess up the codebase. Just insert theme sections block extension and input your HTML/CSS/Javascript theme section codes on the go. Be it making that button red or adding a bar on top of page or adding a script, this app allows you to do that in a quick and simple way. Using Theme Scheduler, Change theme scheduled accordingly.

Key features of the app:

Insert Code snippets to any theme. Simply copy paste the HTML code snippet
Easily add CSS sections to any theme to customize the theme as per your need
Easily Add JavaScript sections to any theme to add additional JS code
Schedule theme change with powerful theme scheduler
Add Google Analytics, Google tag manager, Facebook pixel, meta tag verify code.

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Split Test Pro

by Addison Applications

[1]

Free plan available. Free trial available.

Optimize Your Store with A/B Tests & Insights Using Split Test Pro. Test Your CSS Updates with Ease.

Split Test Pro empowers merchants to unlock their store's full potential through strategic A/B testing. Tailored for all business sizes, our intuitive app guides you in discovering what truly engages your customers. It's more than tweaks; it's about leveraging insights for smarter decisions and higher conversions. Stand out from the competition with Split Test Pro, the essential tool to refine your strategies, optimize customer experience, and test theme updates.

Key features of the app:

Test Style & Theme Changes with CSS-focused A/B Tests.
Unlock Insights with Bayesian Analysis & Proven Test Methods.
View Real-Time, Unsampled Data for Precise Outcomes.
Target Specific URLs & Design Templates Strategically.

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It could be difficult to find the right Shopify CSS editor app for your e-commerce store, so our team has done the work for you.
You can check their ratings and feedback on the app store and then make an informed decision.

If we missed mentioning other important apps, send a message to our team.