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Custom CSS Shopify Apps

Discover the best Custom CSS apps for your Shopify store in 2026. Compare features, pricing, and reviews to find the perfect solution.

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We've analyzed thousands of custom css apps to identify the top performers based on ratings and install counts.

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Easy and smart page builder: build any stunning, sales-ready pages - now supercharged with AI EComposer Landing Page builder lets you design any Shopify page fast with a flexible drag-and-drop editor, smart AI tools, and a huge library of stunning templates for any niche. From Landing, Homepage, Collection page, Product, Blog page, Cart page, Footer, Coming Soon Page, 404 page & any theme section. No code, no limits, no slowing down your site. Replace costly apps with built-in extensions that boost sales. Get the freedom to build the store you imagined - with 24/7 support by your side. EComposer Landing Page builder lets you design any Shopify page fast with a flexible drag-and-drop editor, smart AI tools, and a huge library of stunning templates for any niche. From Landing, Homepage, Collection page, Product, Blog page, Cart page, Footer, Coming Soon Page, 404 page & any theme section. No code, no limits, no slowing down your site. Replace costly apps with built-in extensions that boost sales. Get the freedom to build the store you imagined - with 24/7 support by your side. more Build any page & section: landing to home page, collection page, product, etc. Smart AI for layout builder, element editing, image & content generator 300+ high-converting templates & countless sections for any niche 30+ CRO add-ons: Cross-sell, upsell, popup, back in stock, compare, wishlist etc Advanced: Page Analytics, Global Blocks, Multi-market, Lazy load, etc.

4.9(Reviews)

Countdown timer designs for sale and other promotional purposes. ECOMTREND Countdown Timer app can enhance sales conversion effectively by emphasizing the limited time that the shoppers get to grab the deal. The beautiful and customizable designs allow you to have the exact timer design that matches your theme. This is an essential component for your store if you are planning to run Flash Sales, Seasonal Sales, Daily Deals, or Special Day Sales like Black Friday. ECOMTREND Countdown Timer app can enhance sales conversion effectively by emphasizing the limited time that the shoppers get to grab the deal. The beautiful and customizable designs allow you to have the exact timer design that matches your theme. This is an essential component for your store if you are planning to run Flash Sales, Seasonal Sales, Daily Deals, or Special Day Sales like Black Friday. more Banner type timers and product timers are available Up to 10 different timers on the same page Multi-language support with translations Flexible time scheduling with advanced visibility control Multiple design styles with custom background support

5.0(Reviews)

One Click Upsell & Promoting Discount Code for Online Store Instant Upsell allows you to create discounted upsells automatically in one click. The offers appear as banners that customers can click to apply coupons right away. Encourage your customers to buy more with targeted incentives. When a customer browses a product, the related coupon will pop up. Display your discount offers nicely on all types of screens and devices. Instant Upsell allows you to create discounted upsells automatically in one click. The offers appear as banners that customers can click to apply coupons right away. Encourage your customers to buy more with targeted incentives. When a customer browses a product, the related coupon will pop up. Display your discount offers nicely on all types of screens and devices. more Easy in-store coupon promotion - easy upsell Total control over discounts appearance One-click creation and bulk synchronized Statistic and report impressions and redeem coupons

4.1(Reviews)

Add posts from your Instagram account or by hashtag to your website Installing Instagram Feed app you can choose the best photos from Instagram to fill your site with enticing content, involving more viewers on the website. Accompany photos with call-to-action buttons and turn website visitors into your Instagram followers. Installing Instagram Feed app you can choose the best photos from Instagram to fill your site with enticing content, involving more viewers on the website. Accompany photos with call-to-action buttons and turn website visitors into your Instagram followers. more Various sources to get more exciting content Filters to get full control over the content Full control of sizes and proportions

4.8(Reviews)

Smart Cart Drawer: Increase AOV with cart upsells, cross-sells, free shipping, progress bar, gifts. EliteCart turns your slide cart drawer into a revenue engine. Run cart upsells and cross-sells with automatic product suggestions by EliteAI™. Increase AOV further with a progress bar, free-shipping, free gifts, one-click addons and countdowns. Build trust and increase conversion with banners, badges and payment icons. Easily design your cart with our no-code designer and AI-built custom sections. Quickly integrate other apps. Full support for multi-currency, multi-language & Shopify markets. EliteCart turns your slide cart drawer into a revenue engine. Run cart upsells and cross-sells with automatic product suggestions by EliteAI™. Increase AOV further with a progress bar, free-shipping, free gifts, one-click addons and countdowns. Build trust and increase conversion with banners, badges and payment icons. Easily design your cart with our no-code designer and AI-built custom sections. Quickly integrate other apps. Full support for multi-currency, multi-language & Shopify markets. more Slide cart drawer with cart upsells & cross-sells to boost AOV and conversion. Progress bar with rewards like free shipping, free gifts, and discounts. Maximise revenue with our proprietary AI upsell engine trained on your store. Market-specific free-shipping, rewards, and announcement banners. No-code builder, custom CSS, multi-currency & multi-language support

5.0(Reviews)

Create any type of contact form, custom forms or multi step order forms for your store easily. EVM Forms - Simple & Easy contact form app with many features, easy customer support and easy user interface too. You can create any type of custom forms with this app like registration form, contact us form, questionnaire form, wholesale form, wholesale order form, an order form, survey form, return form, multi step form, feedback form, Popup form, enquiry form and more. EVM Forms - Simple & Easy contact form app with many features, easy customer support and easy user interface too. You can create any type of custom forms with this app like registration form, contact us form, questionnaire form, wholesale form, wholesale order form, an order form, survey form, return form, multi step form, feedback form, Popup form, enquiry form and more. more Create contact us form, questionnaire form, order forms or any form with captcha Get all form entries in app dashboard to manage it anytime & get it on email too Create form with conditional logic for dynamic forms Drag n Drop interface for easy setup, form builder with file upload option Create multistep forms with EVM Custom Form Builder + Feedback Form, Order Form

4.5(Reviews)

EVM Lookbook app to create beautiful Shoppable Lookbook galleries by tagging products on the images EVM Lookbook allows you to create stunning shoppable image galleries which you can place on any page of your store. You can even add galleries on product detail pages too, which automatically detects the product and shows images specific to that product automatically. EVM Lookbook app is easy to use, you can upload images in bulk as well in one go and simply tag products on images as hotspots. Lookbook helps in showing lifestyle images beautifully on store pages. EVM Lookbook allows you to create stunning shoppable image galleries which you can place on any page of your store. You can even add galleries on product detail pages too, which automatically detects the product and shows images specific to that product automatically. EVM Lookbook app is easy to use, you can upload images in bulk as well in one go and simply tag products on images as hotspots. Lookbook helps in showing lifestyle images beautifully on store pages. more Create Shoppable Loookbooks with hotspots / tags on the images of galleries Make it easy for the buyers to purchase products from Lookbooks Bulk image upload + Collage, Slideshow, Carousel, Masonry & Grid display format Direct Add to cart system from images in Lookbook - Direct Buy System Show product specific galleries generated automatically by Lookbook app

4.9(Reviews)

Create stunning image galleries, lookbooks, and video galleries that keep shoppers engaged. Turn your store visuals into a better shopping experience with stunning image and video galleries, lookbooks, portfolios. Each image can be opened in a full-screen popup, allowing shoppers to see all the fine details up close. You can enhance your galleries further by adding titles to images, linking those titles to any page, and including captions for context. With built-in support for SEO-friendly alt tags, your images not only look great but also help boost your store’s visibility in search. Turn your store visuals into a better shopping experience with stunning image and video galleries, lookbooks, portfolios. Each image can be opened in a full-screen popup, allowing shoppers to see all the fine details up close. You can enhance your galleries further by adding titles to images, linking those titles to any page, and including captions for context. With built-in support for SEO-friendly alt tags, your images not only look great but also help boost your store’s visibility in search. more Create image or video gallery with or w/o popups. Add links, title & alt tags. Make fully customizable video gallery using your YouTube or Vimeo videos. Create a main/parent layout & link child galleries to the main . Show media in lightbox popups for a better browsing experience Lookbook, masonry, collage, portfolio, grid, and list layouts

4.8(Reviews)

Safeguard customer data with an all-in-one app that’s compliant with GDPR, CCPA, Law 25, and more. Enzuzo is an intuitive way to keep your eCommerce business compliant with data privacy laws worldwide. We’re a Google-certified consent management platform that adheres to Consent Mode V2. Enzuzo helps you build data subject access requests, privacy policies, cookie consent banners, shipping and return policies, and more to address GDPR, CCPA, and other regulations. We’re best suited for Shopify stores in the U.S., Canada, EEA / EU, UK, Australia, and those shipping globally to these markets. Enzuzo is an intuitive way to keep your eCommerce business compliant with data privacy laws worldwide. We’re a Google-certified consent management platform that adheres to Consent Mode V2. Enzuzo helps you build data subject access requests, privacy policies, cookie consent banners, shipping and return policies, and more to address GDPR, CCPA, and other regulations. We’re best suited for Shopify stores in the U.S., Canada, EEA / EU, UK, Australia, and those shipping globally to these markets. more Advanced consent features: Vary your cookie banner according to visitor region Match your brand identity: Consent manager that’s 100% customizable Custom policies: Generate privacy policies, shipping policies, and more Opt-out requests: Give your customers the option to access or delete data 25+ languages: Talk to your audience in their native language and boost trust

4.3(Reviews)

Boost your sales and increase AOV by offering discounted addons. The Product Add-ons app is built to make the process of purchasing multiple products easy and frictionless. Merchants can create add-ons, offer discounts, and choose from various layouts with a click of a button. By showing relevant add-ons and allowing customers to add them directly to the cart, the app helps support a higher average order value (AOV). Powerful design control lets you create addon widgets that seamlessly fits into your store design. Give us a try and grow your business The Product Add-ons app is built to make the process of purchasing multiple products easy and frictionless. Merchants can create add-ons, offer discounts, and choose from various layouts with a click of a button. By showing relevant add-ons and allowing customers to add them directly to the cart, the app helps support a higher average order value (AOV). Powerful design control lets you create addon widgets that seamlessly fits into your store design. Give us a try and grow your business more Display related products as add-on on the product page and cart page. Apply discounts to the Product Addons Purchase Multiple Products with a Single Click Display Addons as a Group / Section.

5.0(Reviews)

Help customers to compare product & buy the best product from available similar items on your store. Compare product enables customer to make better decision. If your store has such products which can make customers confused to do right purchase, Then this is the app for you. Customers can see comparable products together at same place. You can rearrange / reorder compare product display table rows with drag & drop feature to display product comparison list page more convenient to visitors. Use this feature to differentiate similar products like, Model comparison, style comparison, features Compare product enables customer to make better decision. If your store has such products which can make customers confused to do right purchase, Then this is the app for you. Customers can see comparable products together at same place. You can rearrange / reorder compare product display table rows with drag & drop feature to display product comparison list page more convenient to visitors. Use this feature to differentiate similar products like, Model comparison, style comparison, features more No Code Required, Automated Setup, Lighting Faster & easy compare, comparer tool Color / UI Customization, Advanced Settings, Supports Metafield / Custom fields Reorder list of fields for compare page. Chart on product page,Numeric analytics Variants & Product Comparison, Hide Similarities / Highlight Difference Compatible with Product Filter & Language Translation apps

4.8(Reviews)

Clearly show product sizes and reduce return rates with size charts and size guides. Create size guides quickly to boost customer confidence and reduce returns. Start with a template or build your own, then add it to product pages using tags or display it storewide. Easily customize guides with images, icons, and text to match your brand. Fully compatible with Shopify 2.0 using app blocks. Create size guides quickly to boost customer confidence and reduce returns. Start with a template or build your own, then add it to product pages using tags or display it storewide. Easily customize guides with images, icons, and text to match your brand. Fully compatible with Shopify 2.0 using app blocks. more Save time by quickly and easily creating size guides for your products. The size guides are customisable to match the look of your store. Make it simple for your customers to find the right size, reducing returns. Assign charts based on tags, collections, products, vendors, or product type

4.4(Reviews)

Boost Your Sales with Sales Countdown Timer (when people see a count down timer, they rush to buy) Sales Countdown timer app is a new secret method to boost your sales! Sale timer triggers urgency, scarcity and fomo, driving your customers to Buy NOW, instead of "Buy Later". Wanna sell more? Use this app every day, or use it for specific days (promotion, pre-orders, product launches, flash sale, holidays). Time clock is perfect for the best results during Black Friday, Cyber Monday & beyond. Just click 'Install' and join merchants who use this app to make more money. Sales Countdown timer app is a new secret method to boost your sales! Sale timer triggers urgency, scarcity and fomo, driving your customers to Buy NOW, instead of "Buy Later". Wanna sell more? Use this app every day, or use it for specific days (promotion, pre-orders, product launches, flash sale, holidays). Time clock is perfect for the best results during Black Friday, Cyber Monday & beyond. Just click 'Install' and join merchants who use this app to make more money. more Boost Storewide Sales: By setting an announcement bar timer (top bar or bottom). Increase Conversions: add a product timer, countdown banner or cart countdown. Prevent Cart Abandonment: By using a cart timer (checkout timer) in your cart. Match Counter Style: Customize text, colors, type, timer schedule & placements. Set Any Schedule: To-date, daily recurring, or evergreen fixed-minute countdown.

5.0(Reviews)

Create Lookbook Image Gallery, YouTube Shoppable Video Gallery, Instagram Feed, Product Grid, etc... Display your products & portfolio with Lookbook image gallery, YouTube video gallery, Shoppable video carousel, Shop the Look by tagging products, Instagram feed, product grid, collection gallery, blog gallery, album, and social media feed. Also, you can create a combination of image and video galleries, Shoppable videos to boost sales, etc. Moreover, this gallery app offers hotspot tagging, Vimeo gallery, YouTube shorts & playlists, Instafeed, etc. in grid box, masonry, and collage layouts. Display your products & portfolio with Lookbook image gallery, YouTube video gallery, Shoppable video carousel, Shop the Look by tagging products, Instagram feed, product grid, collection gallery, blog gallery, album, and social media feed. Also, you can create a combination of image and video galleries, Shoppable videos to boost sales, etc. Moreover, this gallery app offers hotspot tagging, Vimeo gallery, YouTube shorts & playlists, Instafeed, etc. in grid box, masonry, and collage layouts. more 80+ High-Converting Gallery Templates Image Gallery: Grid, Masonry, & Collage Styles Shoppable Videos: YouTube Shorts or Shopify-Uploaded Video Gallery: Shopify, Vimeo, Instagram feed & YouTube Video Gallery Lookbook: Shop the look by tagging products from lifestyle gallery hotspots

4.8(Reviews)

18+ Age Verification Popup compliance tool prevents underage visitors from accessing your website Ecom Trend Age Verification Popup Elite app restricts underage visitors entering your Shopify store with a date of birth (DOB) verification. You can set the minimum age limit to access the website like 18+ or 21+ to ensure legal compliance and protection. Customize the popup in line with your store branding and theme. You can prevent underage access on entire website or specific pages. The app is fully responsive and functional on all devices and themes. No coding required. Ecom Trend Age Verification Popup Elite app restricts underage visitors entering your Shopify store with a date of birth (DOB) verification. You can set the minimum age limit to access the website like 18+ or 21+ to ensure legal compliance and protection. Customize the popup in line with your store branding and theme. You can prevent underage access on entire website or specific pages. The app is fully responsive and functional on all devices and themes. No coding required. more Set minimum age requirement with Date of Birth (DOB) Verification. Restrict all pages or specific pages. Use the preset age popup templates or customize with your store branding. Fully functional and responsive on all devices with no coding required. Use the Age Verification Popup app to ensure 18+ legal compliance.

5.0(Reviews)

Add urgency with a live cart countdown timer to boost conversions and reduce cart abandonment fast. Create urgency where it matters most - in the cart. Boost your sales and reduce cart abandonment with a live cart countdown timer that creates urgency and FOMO. ET Countdown Cart Timer adds a reserve message and ticking timer to your cart page or drawer, encouraging faster checkout. Customise the styles and expiry action to match your brand. Easy to install, mobile-friendly, and ideal for flash sales, Black Friday (BFCM), limited-time offers, pre-orders, and abandoned cart recovery campaigns. Create urgency where it matters most - in the cart. Boost your sales and reduce cart abandonment with a live cart countdown timer that creates urgency and FOMO. ET Countdown Cart Timer adds a reserve message and ticking timer to your cart page or drawer, encouraging faster checkout. Customise the styles and expiry action to match your brand. Easy to install, mobile-friendly, and ideal for flash sales, Black Friday (BFCM), limited-time offers, pre-orders, and abandoned cart recovery campaigns. more Supports all types of carts (cart pages, side carts can cart popoups) Set different messages for single or multi-item carts. Configure action after timer expires (extend timer/ clear cart/ go to homepage) Add urgency with reservation clock timer and reduce cart abandonment Works on all themes, mobile-friendly, no coding needed

4.9(Reviews)

Through upselling on the cart page and cart drawer, Cart Upsell Elite contributes to higher income You can set up an amazing cart experience with Ecom Trend Cart Upsell Elite by creating fully effective and configurable upsell options. You may encourage clients to make larger purchases and save more money by utilizing our app. With our customizable options, you can create designs that complement the style and feel of your website. Cart Upsell Elite allows you to add upselling features to both the cart page and drawer. With Ecom Trend Cart Upsell Elite, you can raise conversions and AOV. You can set up an amazing cart experience with Ecom Trend Cart Upsell Elite by creating fully effective and configurable upsell options. You may encourage clients to make larger purchases and save more money by utilizing our app. With our customizable options, you can create designs that complement the style and feel of your website. Cart Upsell Elite allows you to add upselling features to both the cart page and drawer. With Ecom Trend Cart Upsell Elite, you can raise conversions and AOV. more Add upselling blocks to both the cart page and drawer Boosts AOV Highly Customizable Simple setup Unlimited upsell rules

0.0(Reviews)

Get Compliant, Add a Cookie notice to your Shop. The "Europe Cookie Notice" App lets you add a notice to your store that informs your customers that your Store uses cookies. All Shopify Stores use cookies for statistics, basic functionality or even trackers and according to European laws, websites must inform their customers that they are using cookies. Our app helps you fulfill this by allowing you to add a cookie notice bar for European customers (or all customers if you wish). The "Europe Cookie Notice" App lets you add a notice to your store that informs your customers that your Store uses cookies. All Shopify Stores use cookies for statistics, basic functionality or even trackers and according to European laws, websites must inform their customers that they are using cookies. Our app helps you fulfill this by allowing you to add a cookie notice bar for European customers (or all customers if you wish). more Get compliant with the "European Cookie Law". Easily and fully customize the notice bar. Option to show notice to European customers only.

0.0(Reviews)

Sell tickets for your online or in-person events with complete customization while using no code. The all-in-one ticketing solution for event organizers. Easily design, sell, and scan event tickets, all while providing a seamless and branded ticketing experience for your attendees. Customize ticket types, set pricing options, and promote your events effectively. With a seamless integration with your Shopify store, you can manage both event attendees and other customers in one centralized system. Get the benefits of customized white-label ticketing software without the hefty price tag. The all-in-one ticketing solution for event organizers. Easily design, sell, and scan event tickets, all while providing a seamless and branded ticketing experience for your attendees. Customize ticket types, set pricing options, and promote your events effectively. With a seamless integration with your Shopify store, you can manage both event attendees and other customers in one centralized system. Get the benefits of customized white-label ticketing software without the hefty price tag. more Create different ticket types: seated, tiered, multi-day, virtual events, etc. Issue tickets in formats like PDF, Apple Wallet Pass, or calendar tickets. Tickets come a QR code that can be scanned for check-in using mobile apps. Send custom messages (email) to a group or all of your attendees. Integrate with other apps like Klaviyo and MailChimp

4.5(Reviews)

Product Variants as swatches. Color Swatches. Combined Listings: Link products as swatches. Spice up your product page with Easy Variant Swatches. Replace boring dropdown variants with Image, Color, and Button Swatches. We are visual creatures and displaying visual variant selectors can boost conversions. The App is super easy to set up and is backed by Quick, friendly, and emphatic support. Spice up your product page with Easy Variant Swatches. Replace boring dropdown variants with Image, Color, and Button Swatches. We are visual creatures and displaying visual variant selectors can boost conversions. The App is super easy to set up and is backed by Quick, friendly, and emphatic support. more Display Variant Image as Swatches. Display Color Swatches Combined Listings Display Swatches on Collection Page Variant Description. Easily create custom description for every variant Hide out of stock variants. Display Low Stock Alert

5.0(Reviews)

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About Custom CSS Apps for Shopify

Custom CSS apps are essential tools for Shopify merchants looking to enhance their store's functionality and improve customer experience. These specialized applications help store owners streamline operations, increase sales, and provide better service to their customers.

When choosing a custom css app for your Shopify store, consider factors such as features, pricing, customer support, and compatibility with your theme and other apps. Reading reviews from other merchants can also provide valuable insights into the app's performance and reliability.

The apps listed on this page represent some of the best custom css solutions available in the Shopify App Store. Each has been selected based on its functionality, user ratings, and overall value for Shopify merchants.