Organize similar products in ‘groups’ and display them like variants on your product pages. Do you need dedicated product pages for your variants? Want your customers to switch between them easily? groupmate can help with that. We simplify the management of your product groups and seamlessly integrate them into your theme. Without affecting your page speed. Bonus: groupmate comes with an additional 'barebone' version, so that your dev team can truly customize the swatches to your needs and style guide, or build new functionalities on top of it. Do you need dedicated product pages for your variants? Want your customers to switch between them easily? groupmate can help with that. We simplify the management of your product groups and seamlessly integrate them into your theme. Without affecting your page speed. Bonus: groupmate comes with an additional 'barebone' version, so that your dev team can truly customize the swatches to your needs and style guide, or build new functionalities on top of it. more Like the "Shopify Combined Listings" App, already available for everyone Comes with different swatch styles (color, button and image) Simple, non-intrusive integration in your Online Store 2.0 theme Doesn't affect your page speed
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.
View Best Custom CSS AppsSend a birthday email with a discount to build loyalty and repeat purchases Happy Birthday Email lets you celebrate every customer’s birthday with a personalised email and birthday discount. Collect birth dates online or in-store, then send automated birthday emails that drive sales and boost loyalty. Use it as a simple birthday loyalty program or connect it with your email platform. You’ll build stronger relationships and gain insight into customer age and anniversaries too. Happy Birthday Email lets you celebrate every customer’s birthday with a personalised email and birthday discount. Collect birth dates online or in-store, then send automated birthday emails that drive sales and boost loyalty. Use it as a simple birthday loyalty program or connect it with your email platform. You’ll build stronger relationships and gain insight into customer age and anniversaries too. more Send birthday emails with personalised messages and discounts Run a birthday loyalty campaign with zero ongoing effort Collect birthdays and age data at checkout, POS, or landing pages Works with your email platform or sends happy birthday emails for you Populates Shopify’s customer birthday metafield
All in one top bar. Free shipping progress, auto discount, email, countdown, multiple banners. NEW: show free shipping progress in a pop up thermometer! No need to install multiple apps for Free Shipping Bar, Automatic Discount, Coupon, Email, Announcements, or Countdown. Headband includes all these banners in one app, so you can manage all your banners in one place, and have them work seamlessly together. Use multiple banners, stacked or in a slider. Easily customize your banners to match your store's appearance. No changes are made to your theme. No coding is needed. NEW: show free shipping progress in a pop up thermometer! No need to install multiple apps for Free Shipping Bar, Automatic Discount, Coupon, Email, Announcements, or Countdown. Headband includes all these banners in one app, so you can manage all your banners in one place, and have them work seamlessly together. Use multiple banners, stacked or in a slider. Easily customize your banners to match your store's appearance. No changes are made to your theme. No coding is needed. more Free shipping progress bar or thermometer shoppers spend more & convert sooner. Countdown, discount banner, email popup, and linkable announcement for any need. No code necessary. Easily customized look and feel to match your store.
Create customer sign-up forms as unique as your business, and save custom data to customer accounts. Helium Customer Fields is your one-stop shop to collect and manage customer data. Create unique registration forms for different customer groups, and collect first-party data from customers such as birthday, pet's name, VAT/Tax ID, etc. All customer data is synced with Shopify fields and customer metafields. Personalize forms with rules and variables, or add customer tags automatically based on first-party data. Use our integrations to sync customer data with your business/marketing tools. Helium Customer Fields is your one-stop shop to collect and manage customer data. Create unique registration forms for different customer groups, and collect first-party data from customers such as birthday, pet's name, VAT/Tax ID, etc. All customer data is synced with Shopify fields and customer metafields. Personalize forms with rules and variables, or add customer tags automatically based on first-party data. Use our integrations to sync customer data with your business/marketing tools. more Simple drag-and-drop form builder with field types for nearly any use case Approve Wholesale/B2B customers with account approval or email verification Allow customers to edit their own data (name, email, or custom fields) Configure automatic and/or conditional customer tags to organize customer groups Developer-friendly! Front-end and back-end APIs are available for custom builds
Welcome your customers & Boost your sales Welcome your customers on your store and show them announcements, offers, deals and increase your sales. The Hello Announcements App is easy to use and doesn't require any form of coding skills. The app automatically gets installed on your store and if you ever decide to uninstall it, no residue code will be left. The app allows you to easily announce sales, deals and even discount codes. With it many options, you can fully customize the bars including colors, text and even integrate links. Welcome your customers on your store and show them announcements, offers, deals and increase your sales. The Hello Announcements App is easy to use and doesn't require any form of coding skills. The app automatically gets installed on your store and if you ever decide to uninstall it, no residue code will be left. The app allows you to easily announce sales, deals and even discount codes. With it many options, you can fully customize the bars including colors, text and even integrate links. more Welcome your customers and Give them offers = More sales! Customize the announcement bar colors, button label and target countries. Easy to use but has powerful options.
Pop Ups Elevated: beautifully designed popups for abandoned carts, email capture, upsells, etc... Turn visitors into customers. Easy to use pop ups created by famed internet marketer NEIL PATEL over a decade ago. Beautiful templates and an easy to use builder makes it a breeze to create beautiful and engaging popups without a designer. Get access to over 300 templates designed to help capture email addresses, recover abandoned carts, get customer feedback, upsell customers, make announcements and so much more. We're on a mission to help great stores grow through better pop ups. Turn visitors into customers. Easy to use pop ups created by famed internet marketer NEIL PATEL over a decade ago. Beautiful templates and an easy to use builder makes it a breeze to create beautiful and engaging popups without a designer. Get access to over 300 templates designed to help capture email addresses, recover abandoned carts, get customer feedback, upsell customers, make announcements and so much more. We're on a mission to help great stores grow through better pop ups. more Can be used to capture email addresses & recover abandoned carts. Helps to announce sales and drive traffic to specific product pages. Can be targeted based on pages, geo, site location and user behavior. Includes 100s of templates to make it easy to design stunning pop ups and bars. Direct integrations w/ e-mail providers including Klaviyo, Mailchimp, & more
Easily create FAQ page for your store or products to reduce your customer service time & usefulness. Easy FAQ revolutionizes your store's FAQs! Designed with users in mind, it effortlessly crafts stylish product Q&A 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 Q&A 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 & product FAQs & product in simplistic & seamless way. Default support for Google rich SEO snippets for your dedicated FAQ page. You can add photos/videos to your question & answers Supports multiple languages that your store supports!
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
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
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
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.
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
Run post purchase and NPS surveys to collect customer feedback on Thank You & checkout pages. Hulk NPS Post Purchase Survey collects customer feedback on checkout, Thank You and Order Status pages. Build net promoter score (NPS), customer satisfaction (CSAT), and product surveys with drop-downs, checkboxes, radio buttons, and text boxes. Add forms anywhere using checkout blocks - no coding. Personalize questions with conditional logic, collect emails, and get notified of new responses. Sync unlimited responses to Google Sheets or Slack and track insights with analytics. Hulk NPS Post Purchase Survey collects customer feedback on checkout, Thank You and Order Status pages. Build net promoter score (NPS), customer satisfaction (CSAT), and product surveys with drop-downs, checkboxes, radio buttons, and text boxes. Add forms anywhere using checkout blocks - no coding. Personalize questions with conditional logic, collect emails, and get notified of new responses. Sync unlimited responses to Google Sheets or Slack and track insights with analytics. more Run post purchase surveys on Checkout, Thank You and Order Status pages. Conditional logic personalizes each survey question based on prior answers. NPS and rating scores reveal customer satisfaction, behavior & preferences. Build surveys with drop-downs, radio buttons, checkboxes, text & steppers. Export responses or sync survey answers to Slack and Google Sheets.
Add unlimited product options, variants, and swatches with add-on pricing and conditional logic. Hulk Product Options is a product customizer that adds unlimited custom options and variants beyond Shopify's limits. Offer swatches, dropdowns, checkboxes, file uploads, and custom text, with conditional logic that shows or hides options per choice. Boost average order value with add-on pricing - set fixed, percentage, or formula-based charges per option. Apply option sets in bulk across products, track SKUs and inventory, and sell globally with multi-currency, Markets, B2B, and POS support. Hulk Product Options is a product customizer that adds unlimited custom options and variants beyond Shopify's limits. Offer swatches, dropdowns, checkboxes, file uploads, and custom text, with conditional logic that shows or hides options per choice. Boost average order value with add-on pricing - set fixed, percentage, or formula-based charges per option. Apply option sets in bulk across products, track SKUs and inventory, and sell globally with multi-currency, Markets, B2B, and POS support. more Add unlimited product options and variants beyond Shopify's limits. Show or hide options with conditional logic based on each choice. Add-on pricing: apply fixed, percentage, or formula-based charges. Image customizer with swatches, file uploads & Google Font text. Apply option sets in bulk via CSV, with SKU tracking and POS support.
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
Show a slide cart drawer or cart popup with cart discounts, upsell, free shipping progress bar iCart Cart Drawer Cart Upsell is a multi-featured in-cart upselling & cross selling app to boost pre-purchase revenue. Replace your basic cart with a conversion-optimized cart page, slide cart drawer/sticky cart or cart popup. Boost AOV with iCart’s widgets like in cart upsell, product bundle, progress bar, AI recommendations & other cart discounts. Motivate users to buy more save more with free product/free gift, free shipping bar in cart. iCart Cart Drawer Cart Upsell is a multi-featured in-cart upselling & cross selling app to boost pre-purchase revenue. Replace your basic cart with a conversion-optimized cart page, slide cart drawer/sticky cart or cart popup. Boost AOV with iCart’s widgets like in cart upsell, product bundle, progress bar, AI recommendations & other cart discounts. Motivate users to buy more save more with free product/free gift, free shipping bar in cart. more In cart upsell & cross sell: Boost AOV with AI upsell recommendations Instant help: Get instant answers with AI-powered Sidekick questions for iCart Slide cart drawer: Reduce cart abandonment with sticky cart drawer & cart popup Cart discount: Grow revenue by volume discount, BOGO, free gift & upsell offers Progress bar: Encourage customers to buy more with a free shipping bar
Size charts and guides appear on product pages. Help shoppers find their fit and reduce returns. ILM Size Chart & Size Guide lets you add size charts to any product page using Shopify 2.0 app blocks. Build charts with tables, images, video, and rich text, then style them with presets or custom CSS. Charts are mobile and desktop friendly and support unit conversion between cm and inches. Target each chart to specific products, collections, tags, or vendors, and translate chart content for multi-language stores. ILM Size Chart & Size Guide lets you add size charts to any product page using Shopify 2.0 app blocks. Build charts with tables, images, video, and rich text, then style them with presets or custom CSS. Charts are mobile and desktop friendly and support unit conversion between cm and inches. Target each chart to specific products, collections, tags, or vendors, and translate chart content for multi-language stores. 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. Auto-translate size chart content into multiple languages with a few clicks. Convert measurements between cm and inches, and style charts with custom CSS.
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
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
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.
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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.