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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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Easily create FAQ page for your store or product FAQs to reduce your customer service time. Easy FAQ revolutionizes your store's FAQs! Designed with users in mind, it effortlessly crafts stylish product FAQs and seamlessly integrates with your theme for maximum impact! Elevate your brand with full customization—tweak fonts, colors, and styles to match your unique flair. Plus, experience lightning-fast page loads, ensuring your customers get the answers they need in a blink. Reduce customer support requests with questions and answers! App also easily integrated with Shop app! Easy FAQ revolutionizes your store's FAQs! Designed with users in mind, it effortlessly crafts stylish product FAQs and seamlessly integrates with your theme for maximum impact! Elevate your brand with full customization—tweak fonts, colors, and styles to match your unique flair. Plus, experience lightning-fast page loads, ensuring your customers get the answers they need in a blink. Reduce customer support requests with questions and answers! App also easily integrated with Shop app! more Fully customizable FAQ themes to match with your store brand & style. Allows creation of store FAQs & product FAQs in simplistic & seamless way. Default support for Google rich SEO snippets for your dedicated FAQ page. You can add photos/videos to your FAQs Supports multiple languages that your store supports!

5.0(Reviews)

Add urgency and fear-of-missing-out effects to your sales, and increase conversion and sales Countdown Timer Bar can help you add a sense of urgency in your sales events, make your customers feel they must act now to avoid missing out on something important, and drive more sales. The App supports various types of timers, such as one-time, auto-recurring, daily & weekly timer. You can use them for different sales events. It also offers targeting options including geo location, customer, page, etc. You can have targeted events for different countries, customers, and optimize the sales. Countdown Timer Bar can help you add a sense of urgency in your sales events, make your customers feel they must act now to avoid missing out on something important, and drive more sales. The App supports various types of timers, such as one-time, auto-recurring, daily & weekly timer. You can use them for different sales events. It also offers targeting options including geo location, customer, page, etc. You can have targeted events for different countries, customers, and optimize the sales. more One-time, auto-recurring, daily & weekly timers can fit different types of sales Advanced targeting: location, Shopify markets, customer, page, product, device Scheduling, you can plan sales events 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)

Promote free shipping with progressive messages to motivate customers to buy more & boost sales Free Shipping Bar displays progressive messages when customers put more items in their shopping carts, and lets them know how much more to buy in order to get your free shipping. This increases average order value and boosts sales. The bar is fully customizable with advanced targeting options including geo location, Shopify markets, customer, page, product, etc. You can have multiple free shipping offers for different countries, customers, and optimize the sales. Free Shipping Bar displays progressive messages when customers put more items in their shopping carts, and lets them know how much more to buy in order to get your free shipping. This increases average order value and boosts sales. The bar is fully customizable with advanced targeting options including geo location, Shopify markets, customer, page, product, etc. You can have multiple free shipping offers for different countries, customers, and optimize the sales. more Display messages with progressive shipping goals, and boost sales Advanced targeting: location, Shopify markets, customer, page, product, device Scheduling, you can plan free shipping in advance for events like Black Friday Fully customizable & supports all pages, 1-click to enable, no coding required Auto-detect visitors' local currencies and convert the free shipping amount

4.9(Reviews)

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

3.6(Reviews)

Increase AOV with cart upsells, free gifts, and rewards. Customize your cart drawer easily Create a customizable cart drawer with cart upsells, free gifts, rewards bars, discount fields, sticky cart features, and product recommendations. Offer BOGO promotions, cart goals, and frequently bought together bundles to encourage larger orders and reduce cart abandonment. Customize the cart experience without editing theme code and manage promotions from a single dashboard Create a customizable cart drawer with cart upsells, free gifts, rewards bars, discount fields, sticky cart features, and product recommendations. Offer BOGO promotions, cart goals, and frequently bought together bundles to encourage larger orders and reduce cart abandonment. Customize the cart experience without editing theme code and manage promotions from a single dashboard more Cart Upsells: Recommend products directly in the cart drawer Rewards Bar: Encourage larger orders with cart goals Free Gifts: Offer automatic gifts based on cart conditions Discount Field: Apply discount codes directly in the cart Sticky Cart Drawer: Keep the cart accessible across the store

4.7(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.

4.8(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 surveys, NPS surveys for collecting real feedback from Thank You & Order Tracker pages Use post purchase survey app for collecting customer feedback after orders. Create NPS surveys, checkout surveys, customer surveys, product surveys, and CSAT surveys. Add form anywhere using checkout blocks. Build survey forms with drop-downs, text boxes, radio buttons, checkboxes, and steppers. Use conditional logic to personalize questions, collect email addresses, receive notification emails, and sync survey responses to Google Sheets or Slack. Monitor customer insights from survey analytics. Use post purchase survey app for collecting customer feedback after orders. Create NPS surveys, checkout surveys, customer surveys, product surveys, and CSAT surveys. Add form anywhere using checkout blocks. Build survey forms with drop-downs, text boxes, radio buttons, checkboxes, and steppers. Use conditional logic to personalize questions, collect email addresses, receive notification emails, and sync survey responses to Google Sheets or Slack. Monitor customer insights from survey analytics. more Review customer feedback and export or sync responses to Slack & Google Sheets Use conditional logic to personalize survey questions based on previous response Create post-purchase surveys for Checkout, Thank You & Order Status pages Use multiple question types to customize your post purchase feedback layout Review customer behavior, preferences & satisfaction via NPS / rating scores

4.8(Reviews)

All-in-one product customizer with enhanced conditional logic, and POS Support. Build limitless customization for growth. Use conditional logic variants and dynamic product options to create a powerful product customizer. Optimized for Markets and B2B, this tool handles large catalogs for both small & enterprise stores. Offer personalization with file uploads & image customizers. Boost revenue with variant-based pricing, formula-based options, & add-on pricing. Includes SKU and inventory management with 24/7 real human support, setup assistance, & fast issue resolution. Build limitless customization for growth. Use conditional logic variants and dynamic product options to create a powerful product customizer. Optimized for Markets and B2B, this tool handles large catalogs for both small & enterprise stores. Offer personalization with file uploads & image customizers. Boost revenue with variant-based pricing, formula-based options, & add-on pricing. Includes SKU and inventory management with 24/7 real human support, setup assistance, & fast issue resolution. more Show or hide app options using conditional logic on options & Shopify variants. Sell globally with multi-currency & Shopify Markets. Add-on pricing: apply fixed, percentage, or formula-based pricing to options. Product image customizer with file uploads and Google Font text selectors. Create and apply option sets in bulk for multiple products and collections.

4.8(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)

Add a customizable side cart drawer & boost AOV with cart discount, AI cart upsells & progress bar iCart Cart Drawer Cart Upsell is a full-featured upselling and cross-selling app to boost sales before checkout. Create a stunning sticky cart, cart popup or cart page with an easy-to-use no-code cart editor. Boost AOV with AI-powered product upsells, cross-sells, product bundles, progress bar/shipping bar, order delivery date & time picker & more. Recover lost sales by giving your customers special discounts & free gifts. So why wait? Create irresistible deals & reduce cart abandonment now! iCart Cart Drawer Cart Upsell is a full-featured upselling and cross-selling app to boost sales before checkout. Create a stunning sticky cart, cart popup or cart page with an easy-to-use no-code cart editor. Boost AOV with AI-powered product upsells, cross-sells, product bundles, progress bar/shipping bar, order delivery date & time picker & more. Recover lost sales by giving your customers special discounts & free gifts. So why wait? Create irresistible deals & reduce cart abandonment now! more Fully customizable cart drawer, popup & full cart compatible with all themes Increase your AOV by giving cart upsell & cross sell offers in side cart drawer Motivate customers to buy more save more with free shipping bar/progress bar Make more revenue by giving cart discounts like volume discounts, BOGO & more Show urgency in product upsell offers by showing a cart timer/countdown timer

4.7(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)

Create beautiful image sliders, banner sliders, logo carousels, and lookbook without coding Image Slider Pro helps you create banner sliders, logo carousels, and lookbook-style sliders in just a few steps. Upload multiple images, control slider speed, add captions, and link each image to products, collections, pages, or external URLs. The app is mobile responsive and designed to help merchants display visual content in a clean, professional way. The Shopify App Store listing highlights features including bulk image upload, custom styles, captions, hover effects & scheduling. Image Slider Pro helps you create banner sliders, logo carousels, and lookbook-style sliders in just a few steps. Upload multiple images, control slider speed, add captions, and link each image to products, collections, pages, or external URLs. The app is mobile responsive and designed to help merchants display visual content in a clean, professional way. The Shopify App Store listing highlights features including bulk image upload, custom styles, captions, hover effects & scheduling. 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

4.7(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 custom video galleries on page, easy to setup with theme editor. Instagram gallery using official Facebook API. Login with Facebook or Instagram in your own account & display instafeed from your Instagram account. Make shoppable instafeed, reels & stories 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 custom video galleries on page, easy to setup with theme editor. Instagram gallery using official Facebook API. Login with Facebook or Instagram in your own account & display instafeed from your Instagram account. Make shoppable instafeed, reels & stories 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)

Turn product images into room visualizers using 3D & AI. Increase buyer confidence & conversions. 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 Room Visualizer: Upload a room photo and style with your products AI-Powered 3D Models: Create realistic 3D models faster and cheaper Magic Eraser. Allow Customers to clean their rooms before uploading AI Shopping: Quick product recommendations based on users' requirements & needs HQ Renders: Create lifestyle product images at a fraction of studio costs.

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

4.7(Reviews)

Go beyond variant limits with custom product options Let shoppers customize products directly on your product pages with custom text fields and flexible options. Go beyond Shopify's variant limits and offer the options your products actually need. Add pricing for upgrades and bundle add-ons, and create flexible product configurations. Whether you're offering engraving, monograms, add-ons, bundles, or more complex product configurations, Infinite Options helps you collect exactly what you need. Let shoppers customize products directly on your product pages with custom text fields and flexible options. Go beyond Shopify's variant limits and offer the options your products actually need. Add pricing for upgrades and bundle add-ons, and create flexible product configurations. Whether you're offering engraving, monograms, add-ons, bundles, or more complex product configurations, Infinite Options helps you collect exactly what you need. more Add text boxes, dropdowns, checkboxes, swatches, and more Show or hide options based on selections with conditional logic Add pricing for upgrades, bundles, and add-ons Customer selections are included with each order in your Shopify admin Merchants love the fast, reliable support from our US-based team

4.7(Reviews)

One platform for marketing and customer engagement teams to collaborate effectively. Insider One is the platform that brings everything marketing and customer engagement teams need in one place so they can reach their peak performance and become unstoppable. With AI and an integrated Customer Data Platform (CDP), Insider One unites data, personalization, and journey orchestration across the most extensive set of natively supported channels, including WhatsApp, SMS, Email, Web, App, and Site Search. Insider One provides the ultimate vendor experience for 2,000+ customers. Insider One is the platform that brings everything marketing and customer engagement teams need in one place so they can reach their peak performance and become unstoppable. With AI and an integrated Customer Data Platform (CDP), Insider One unites data, personalization, and journey orchestration across the most extensive set of natively supported channels, including WhatsApp, SMS, Email, Web, App, and Site Search. Insider One provides the ultimate vendor experience for 2,000+ 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

4.6(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.