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Custom CSS Shopify Apps

Discover the best Custom CSS apps for your Shopify store in 2025. 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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Promote sales on a fully customizable banner, increase customer awareness and boost sales Always keeping your customers in the loop about your business updates, promotions, and events is a key element of managing customer relationships. Quick Announcement Bar makes this easier and quicker. You can add a fully customizable banner on your website with a few clicks, inform your customers. You can have multiple bars shown in rotation or with various animations. You can offer different sales on different bars for different geo locations, customers, pages, etc, and optimize the return. Always keeping your customers in the loop about your business updates, promotions, and events is a key element of managing customer relationships. Quick Announcement Bar makes this easier and quicker. You can add a fully customizable banner on your website with a few clicks, inform your customers. You can have multiple bars shown in rotation or with various animations. You can offer different sales on different bars for different geo locations, customers, pages, etc, and optimize the return. more Present your sales events with a customized bar, increase awareness and sales Advanced targeting geo location, customer, page, product, device targeting Scheduling, you can plan sales in advance for events like Black Friday Fully customizable with various rotation & animation, background images & styles Supports all pages, 1-click to enable, no coding required

4.9(Reviews)

Quick access to product preview in one click without reloading the whole site. Quick View app gives your shoppers quick access to product preview in one click without reloading the whole site. The app will not only reduce shopping time but also bring a convenient experience to shoppers. Your shoppers can view product details quickly without leaving the catalog navigation. This makes browsing products easier and faster, which helps increase conversion rates. Products may be added to the cart from the Product Quick View pop-up. Quick View app gives your shoppers quick access to product preview in one click without reloading the whole site. The app will not only reduce shopping time but also bring a convenient experience to shoppers. Your shoppers can view product details quickly without leaving the catalog navigation. This makes browsing products easier and faster, which helps increase conversion rates. Products may be added to the cart from the Product Quick View pop-up. more Reduce shopping time, and improve customer experience. Increase your sales. Let customers view the product information, add it to cart in a popup Add to wishlist, compare products

3.9(Reviews)

Boost your conversions with slide cart upsells, free gifts & custom brand design support! Increase your store’s average order value with progress bars, cart upsells, free gifts, BOGO (Buy X Get Y) offers, frequently bought together bundles, discounts, and promotions. The sticky cart drawer looks great on any theme and helps reduce cart abandonment by keeping the cart accessible anywhere on your site. Unlock 10+ powerful features and transform your cart into a revenue-driving machine — fully designed for your brand. Increase your store’s average order value with progress bars, cart upsells, free gifts, BOGO (Buy X Get Y) offers, frequently bought together bundles, discounts, and promotions. The sticky cart drawer looks great on any theme and helps reduce cart abandonment by keeping the cart accessible anywhere on your site. Unlock 10+ powerful features and transform your cart into a revenue-driving machine — fully designed for your brand. more Cart Upsell & Cross-Sell: Suggest complementary products right in the cart Rewards Progress Bar: Motivate customers to spend more with reward goals Free Gifts: Automatically offer gifts based on products, MOQ, or cart value Discount Bar: Let shoppers apply and stack discount codes in the cart drawer Sticky Cart Drawer: A floating cart that stays visible and accessible storewide

4.5(Reviews)

Generate menu items and smart managed by drag & drop. Mega Menu Creator Pro is a responsive, highly customizable, drag and drop menu builder app for Shopify. Its user friendly experience allows creators of all skill levels to design highly navigable mega menus for their Shopify website. Mega Menu Creator Pro is a responsive, highly customizable, drag and drop menu builder app for Shopify. Its user friendly experience allows creators of all skill levels to design highly navigable mega menus for their Shopify website. more Smart menu creator with drag & drop menu builder, no reloads the page. Add any HTML, shortcode, maps, contact forms or widget you like the menu & more. Responsive and touch-enabled for an enhanced mobile/tablet experience. Flexible for custom menu layout and re-order items position instantly. Caching optimized for fastest loading and SEO results.

4.7(Reviews)

Build unlimited forms with custom fields easily for contact forms or surveys using Form Builder Form Builder lets you create unlimited custom forms, including registration forms, contact forms, survey forms, wholesale order forms, multi-step forms, and Typeform-style forms for your Shopify store. With drag-and-drop design, Google reCaptcha, advanced conditional logic, and custom fields, building forms is easier than ever. Fully mobile-responsive, supports file uploads, and works with all Shopify themes. Track UTMs and customize every detail to match your brand. Form Builder lets you create unlimited custom forms, including registration forms, contact forms, survey forms, wholesale order forms, multi-step forms, and Typeform-style forms for your Shopify store. With drag-and-drop design, Google reCaptcha, advanced conditional logic, and custom fields, building forms is easier than ever. Fully mobile-responsive, supports file uploads, and works with all Shopify themes. Track UTMs and customize every detail to match your brand. more Create custom registration forms, contact forms, survey & more with file uploads Design your forms by using advanced conditional and dynamic field logic Personalized forms are designed to fit the aesthetic of your shop We provide immense storage amounts, allowing you to upload more files Use Form Builder to connect your custom email domains to other apps seamlessly

4.8(Reviews)

Post Purchase Survey app is the perfect tool for gathering post purchase feedback from customers. With this app, you can easily create custom surveys, including checkout surveys, product surveys, and exit surveys, to measure your net promoter score and gain insights into your customers' experiences. This post purchase survey app is designed to help you improve customer satisfaction and loyalty by providing you with the data you need to make informed decisions. Try the HulkApps NPS Post Purchase Survey app today and start collecting valuable customer feedback! With this app, you can easily create custom surveys, including checkout surveys, product surveys, and exit surveys, to measure your net promoter score and gain insights into your customers' experiences. This post purchase survey app is designed to help you improve customer satisfaction and loyalty by providing you with the data you need to make informed decisions. Try the HulkApps NPS Post Purchase Survey app today and start collecting valuable customer feedback! more One-click install the Post Purchase Survey app and track customer feedback. Gather valuable insights in under 30 seconds and warrant customer satisfaction. Embed post purchase survey into the Thank You page and boost response rates. Leverage our analytics dashboard to promptly act on your post purchase feedback. Create dynamic post-purchase surveys with the Conditional Logic feature.

4.8(Reviews)

Add unlimited product options and variants with color swatches, file uploads & conditional logic. Our Custom Product Options app functions as a versatile tool, serving as a product filter, customizer, and bundler. This allows for innovative approaches to boost sales. Enable customers to upload images illustrating their desired customized products, and apply bulk customizations to numerous products simultaneously. Plus, import/export options and option sets. Our Custom Product Options app functions as a versatile tool, serving as a product filter, customizer, and bundler. This allows for innovative approaches to boost sales. Enable customers to upload images illustrating their desired customized products, and apply bulk customizations to numerous products simultaneously. Plus, import/export options and option sets. more Allow customers to personalize their products with a variety of options. Compatible with Shopify "Buy Now" and Shop Pay express checkout buttons. Enable your customers to upload an image of how the custom product should look. Bulk apply custom options to thousands of products at a time. Provide photos or color swatches to shoppers during their product selection.

4.7(Reviews)

Sticky Add to Cart makes it easier for shoppers to find what they need and buy it quickly Sticky add to cart bar appears after scrolling the product page to attract customers. Customers can quickly add items to their cart using sticky add to cart bar. You can also add multiple notification bars to display discounts or free shipping messages to motivate customers to buy products. Sticky add to cart bar appears after scrolling the product page to attract customers. Customers can quickly add items to their cart using sticky add to cart bar. You can also add multiple notification bars to display discounts or free shipping messages to motivate customers to buy products. more Set bar size medium, small & extra small & Different button design & animation Sticky Add To Cart Bar can set in two positions top & bottom You can Fully Customization of Sticky Add to Cart bar with different settings Hide title, variant & whole bar on mobile and combine variants on mobile

0.0(Reviews)

Boost AOV & turn your basic cart into a sales-driven side cart with cart upsell, progress bar & more Enable a revenue-driven pre-built cart drawer and fine-tune iCart’s widgets to drive more conversions. With no coding, you can easily enable a slide cart, cart popup or full cart in one click. Make the best out of pre-purchase sales from AOV boosters like product upsells, personalized product recommendations, progress bar, bundles. Increase customer loyalty with free gifts & volume discount. Convert every cart item into a sale through upselling & cross-selling with iCart. Enable a revenue-driven pre-built cart drawer and fine-tune iCart’s widgets to drive more conversions. With no coding, you can easily enable a slide cart, cart popup or full cart in one click. Make the best out of pre-purchase sales from AOV boosters like product upsells, personalized product recommendations, progress bar, bundles. Increase customer loyalty with free gifts & volume discount. Convert every cart item into a sale through upselling & cross-selling with iCart. more Increase your cart items by showing a free shipping bar with free product & more Boost revenue before checkout with in cart upsell & cross-sell offers Improve cart visibility with a sticky cart drawer that remains fixed Offer cart discount like free gift with purchase to increase conversions Customize your store in minutes with a no-code, drag-and-drop interface

4.8(Reviews)

Increase AOV w/Targeted Upsell & Cross Sell Offers. Product Page, In Cart, Pop-ups, & Post Purchase! Boost order values with In Cart Upsell & Cross-Sell app & create customized cart & post purchase upsell & cross-sell offers. Personalize shoppers experience w/ conditional logic & triggers. Perfect your upsell strategy with A/B testing on product upsell & cross-sell offers. Analyze effectiveness with an intuitive upselling dashboard. Post Purchase upselling & cross selling is easy with an in cart upsell cart app with 3 minute setup. This robust upsells app maximizes upselling and cross-selling. Boost order values with In Cart Upsell & Cross-Sell app & create customized cart & post purchase upsell & cross-sell offers. Personalize shoppers experience w/ conditional logic & triggers. Perfect your upsell strategy with A/B testing on product upsell & cross-sell offers. Analyze effectiveness with an intuitive upselling dashboard. Post Purchase upselling & cross selling is easy with an in cart upsell cart app with 3 minute setup. This robust upsells app maximizes upselling and cross-selling. more Maximize AOV with upsells on cart page/drawer, product pages & post purchase Set triggers & rules for efficiently targeted cart upsell & cross-sell offers Drive extra revenue with our robust pre and post-purchase upsell capability Fine-tune upsell cart strategies with a smart, easy to read analytics dashboard AI-autopilot feature to power the perfect automatic upselling and cross-selling

4.8(Reviews)

Size Chart & Size Guide: Your seamless solution for precise sizing guidance, reduce return. Effortless sizing with ILM Size Chart & Size Guide app. Add multiple size chart templates, customize each size chart with images, videos, tabs, and custom CSS. Every size chart is mobile and desktop friendly. Display a size chart using app blocks on Shopify 2.0. Support unit conversion between cm and inches. Upload images or use the built-in library to enhance each size chart. Create a clear, consistent, and powerful size chart experience. Effortless sizing with ILM Size Chart & Size Guide app. Add multiple size chart templates, customize each size chart with images, videos, tabs, and custom CSS. Every size chart is mobile and desktop friendly. Display a size chart using app blocks on Shopify 2.0. Support unit conversion between cm and inches. Upload images or use the built-in library to enhance each size chart. Create a clear, consistent, and powerful size chart experience. more Pre-made size chart templates & add multiple size tables, Images, Text, Videos. Assign size chart to specific collections, products, vendors, types and tags. Choose from versatile display options: Floating, Inline, or Block size chart. Quickly localize your size chart into multiple languages with just a few clicks Unit Conversion between cm, inches and CSS customization in size charts

4.9(Reviews)

Showcase Images in a slider layout for better lookbooks. Create banner slider and carousel slider. Make slider using our app. Simply upload large image and let your customers appreciate your fashion images. You can upload multiple photos at once. Control the slider speed. Add text or comments on your images. Add URLs to direct your customers after clicking the image in the slider. Completely mobile responsive. Make slider using our app. Simply upload large image and let your customers appreciate your fashion images. You can upload multiple photos at once. Control the slider speed. Add text or comments on your images. Add URLs to direct your customers after clicking the image in the slider. Completely mobile responsive. more Customize speed and add text and links to images from the backend effectively Redirect customers to products or external links when they click the images Install logo slider anywhere on your store home page or products/collection page

4.1(Reviews)

Shoppable Instagram feed with different Grid / Slider layouts and lot of customization options. Instafeed / Instagram feed gallery with many customization options enables merchant to display instagram gallery as a grid, slider. Auto and real time sync with instagram. Light weight on page, easy to setup with theme editor without single line of code. Instagram gallery using official facebook API. Login with facebook or instagram in your own account & display instafeed from your instagram account. Make shoppable instafeed with product tagging on instagram picture. Instafeed / Instagram feed gallery with many customization options enables merchant to display instagram gallery as a grid, slider. Auto and real time sync with instagram. Light weight on page, easy to setup with theme editor without single line of code. Instagram gallery using official facebook API. Login with facebook or instagram in your own account & display instafeed from your instagram account. Make shoppable instafeed with product tagging on instagram picture. more Tag products to make it shoppable instagram feed. Tag unlimited products Attractive popup & gallery layouts help you to get instagram followers Social proof with user generated contents. Increase brand awareness w/ instafeed No Branding, Connect with Facebook / Instagram, Hide / Show Images Open image in popup or redirect to instagram link from instagram feed

4.8(Reviews)

Elevate your storefront & grow sales with our 3D, AR product visualiser and AI assistant Consumers abandon online furniture purchases due to overwhelming choices and difficulty visualising products. Imersian's AI-powered 3D and AR technologies simplify the design and shopping process. Merchants can showcase their products in a real-life context, enhancing the shopping experience. Customers can upload images of their interiors and style them with retailers' products, leading to increased conversions, lower abandonment rates, satisfied, loyal customers & higher order value. Consumers abandon online furniture purchases due to overwhelming choices and difficulty visualising products. Imersian's AI-powered 3D and AR technologies simplify the design and shopping process. Merchants can showcase their products in a real-life context, enhancing the shopping experience. Customers can upload images of their interiors and style them with retailers' products, leading to increased conversions, lower abandonment rates, satisfied, loyal customers & higher order value. more Imersian Designer: Upload a room photo and style as you wish with your products AI-Powered 3D Models: Create realistic 3D models faster and cheaper Multi-product AR: Compare & view multiple products in your room, no app installs AI Shopping: Quick product recommendations based on users' requirements & needs

5.0(Reviews)

Improve your store's experience with an efficient and actionable search engine, powered by AI Empower your store with a fast, actionable AI-powered search bar that aligns with your business goals. Enhance your store with advanced search by text, images and sketches. Configure search and filters by using any attribute or meta fields. Understand your visitors and analyze your store with the reports in Impresee Dashboard PRO. Empower your store with a fast, actionable AI-powered search bar that aligns with your business goals. Enhance your store with advanced search by text, images and sketches. Configure search and filters by using any attribute or meta fields. Understand your visitors and analyze your store with the reports in Impresee Dashboard PRO. more Advanced AI-powered search to enhance customer experience Search by text, image and sketch without usage limits Advanced search analytics, zero-hit searches, conversions, and more Fully configurable filters in search results, boost products in search results Actionable alerts for your business

4.5(Reviews)

Creating Custom Product Options with Infinite Flexibility for Over Nine Years and Counting! Let your shoppers customize products by adding option fields to your product pages like: text inputs, dropdown menus, color and variant image swatches, radio buttons, date pickers, checkboxes, large textareas, widths, heights, dimensions, and much more. You can even bundle add-on products to option selections to increase the price of your item. Need to add a gift-wrapping surcharge? How about $15 for rush processing? It's easy with Infinite Options. Let your shoppers customize products by adding option fields to your product pages like: text inputs, dropdown menus, color and variant image swatches, radio buttons, date pickers, checkboxes, large textareas, widths, heights, dimensions, and much more. You can even bundle add-on products to option selections to increase the price of your item. Need to add a gift-wrapping surcharge? How about $15 for rush processing? It's easy with Infinite Options. more Text inputs, radio buttons, checkboxes, dropdown menus, color swatches and more! Use options to offer addon bundles so you can increase average order values Personalize products with swatches, engraving, monogramming, and custom printing Show/hide relevant options based on selections with conditional logic Our friendly USA-based support team is here to help you every step along the way

4.8(Reviews)

Boost revenue with 1:1 personalization and cross-channel marketing on Email, WhatsApp, SMS, and more Insider enables you to create 1:1 relationships with your customers and deliver experiences on Website, App, Email, SMS, Push and WhatsApp Messages. Leverage Insider's 100+ templates like Social Proof, InStory, Cart Reminder, Recommendations and more to engage anonymous shoppers right from their first interaction to purchase and all the way through to make them your loyal customers. Insider enables you to create 1:1 relationships with your customers and deliver experiences on Website, App, Email, SMS, Push and WhatsApp Messages. Leverage Insider's 100+ templates like Social Proof, InStory, Cart Reminder, Recommendations and more to engage anonymous shoppers right from their first interaction to purchase and all the way through to make them your loyal customers. more Recover abandoned carts with triggered Email and SMS Personalize your store with 100+ pre-built templates like Social Proof and more Deliver AI-powered, affinity based recommendations to drive upsell/cross-sell Trigger price drop notifications with WhatsApp Business messages Build unified customer profiles with past behavior, analytics and predictions

5.0(Reviews)

The all-in-one Instagram app. Instagram Feed, Instagram Story, Instagram Highlights, Instagram Reels Connect with your Instagram account and the app automatically updates whenever you post. Instagram Feed - Automatically integrate your Instagram Feed into a beautiful carousel/slider within your website. Instagram Stories - Get the latest stories from your profile in the same format as seen on Instagram. Instagram Highlights - Retrieve all highlights and display them in an amazing slider anywhere in your store. Instagram Reels - Instantly transform your store with Instagram Reels. Connect with your Instagram account and the app automatically updates whenever you post. Instagram Feed - Automatically integrate your Instagram Feed into a beautiful carousel/slider within your website. Instagram Stories - Get the latest stories from your profile in the same format as seen on Instagram. Instagram Highlights - Retrieve all highlights and display them in an amazing slider anywhere in your store. Instagram Reels - Instantly transform your store with Instagram Reels. more Instagram Feed - Display a simple but beautiful feed of your latest posts. Instagram Story & Highlights - Bring those Instagram circles to your store. Instagram Reels - Embed your latest reels instantly. Mobile Optimised - Automatically resizes to work on all display sizes No Coding Required - Instantly add your TikTok feed within seconds.

0.0(Reviews)

Instagram feed, shoppable videos and UGC: convert your store visitors into customers. With Instafeed by Mintt Studio, you can easily add shoppable Instagram feeds, shoppable videos and UGC to your store exactly as you wish. You can also create feeds by uploading your own files. Displaying feeds with engaging content such as photos, videos and Reels on your store can help you build social proof and drive sales. Instafeed also lets you automatically update your store with the latest Instagram content, ensuring it stays fresh with new products and trends your visitors can shop for. With Instafeed by Mintt Studio, you can easily add shoppable Instagram feeds, shoppable videos and UGC to your store exactly as you wish. You can also create feeds by uploading your own files. Displaying feeds with engaging content such as photos, videos and Reels on your store can help you build social proof and drive sales. Instafeed also lets you automatically update your store with the latest Instagram content, ensuring it stays fresh with new products and trends your visitors can shop for. more Show posts (photos, Reels, videos) in gallery grid or slider layout Manual or auto optimized layout Custom rows and columns for mobile Tag multiple products and collections - create shoppable photo and video feeds Filter your posts by hashtags

4.9(Reviews)

Instafeed - Instagram Feed, Instagram Story, Instagram Highlights, Instagram Reels Instafeed – The ultimate Instagram app for your store. Simple Instagram integration. Seamlessly connect your Instagram account to automatically update your store with your latest posts, stories, reels and highlights. With this Instafeed, showcase your Instagram feed in a beautiful carousel/slider on your website, effortlessly integrate stories and display highlights in a stunning slider anywhere in your store. Instantly transform your store and automatically drive fresh new content. Instafeed – The ultimate Instagram app for your store. Simple Instagram integration. Seamlessly connect your Instagram account to automatically update your store with your latest posts, stories, reels and highlights. With this Instafeed, showcase your Instagram feed in a beautiful carousel/slider on your website, effortlessly integrate stories and display highlights in a stunning slider anywhere in your store. Instantly transform your store and automatically drive fresh new content. more Instagram Feed - Display a simple but beautiful feed of your latest posts Instagram Story & Highlights - Bring those Instagram circles to your store Instagram Reels - Embed your latest reels instantly Mobile Optimised - Automatically resizes to work on all display sizes No Coding Required - Instantly add your Instagram feed within seconds

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.