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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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Sell more by showcasing amazing lookbook and shoppable image with gallery and carousel upsell bundle Shoppers expect a seamless shopping experience. Upsell to your customers through curated lookbook carousel,image hotspots and image gallery offers. Showcase exact lookbook from product page or offer complementary products a la complete the look style. Shop the Look offers on-brand, shoppable image hotspot that boost sales through customized, recommended product upsell bundles across collections, cart page and product page. Optimised for mobile & no code is required! Shoppers expect a seamless shopping experience. Upsell to your customers through curated lookbook carousel,image hotspots and image gallery offers. Showcase exact lookbook from product page or offer complementary products a la complete the look style. Shop the Look offers on-brand, shoppable image hotspot that boost sales through customized, recommended product upsell bundles across collections, cart page and product page. Optimised for mobile & no code is required! more Build multiple lookbook & product page bundles that match your brand guidelines Lookbook format and shoppable images gallery with design that boost your sales In one click add get the look to cart from carousel and product page gallery Grow AOV by product page discount & lookbook shoppable image hotspot and gallery Premium 24/7 support: Pixel perfect shop the look and product page carousel

5.0(Reviews)

Engage Customers with Product Recommendations Quiz. AI, Drag & Drop, import/export for conversions. Create personalized product recommender quizzes and post-purchase surveys to tailor your customers' experience. With our easy-to-use no-code quiz builder, increase conversions and reduce returns! Customize pages easily with text, image, date and collect emails to ensure a unique brand experience that resonates. Create conditional jump logic rules & outcomes to upsell and recommend products. Gift finder & other templates with analytics help collect lead data for targeted recommendations! Create personalized product recommender quizzes and post-purchase surveys to tailor your customers' experience. With our easy-to-use no-code quiz builder, increase conversions and reduce returns! Customize pages easily with text, image, date and collect emails to ensure a unique brand experience that resonates. Create conditional jump logic rules & outcomes to upsell and recommend products. Gift finder & other templates with analytics help collect lead data for targeted recommendations! more Product Recommender Quizzes & Surveys: Import/export, QnA, text, image & email! Edit recommender quizzes: add layout design, templates, drag & drop, custom CSS Add conditional and jump logic to direct users to desired quiz or survey pages Add products/collections to Product Recommender pages with a Slot wise division! Klaviyo integration, Email & Text, Export Analytics to collect data & retarget.

4.4(Reviews)

Build high-converting mega menus, navigation, and bottom menu bars for online stores Improve store navigation with advanced mega menus, navigation menus, and bottom menu bars designed for better browsing and product discovery. Create multi-level dropdowns, tabbed menus, and structured layouts with full design control. Highlight products, collections, and promotions directly in menus. Fully customizable, mobile-friendly, and easy to manage without coding. Improve store navigation with advanced mega menus, navigation menus, and bottom menu bars designed for better browsing and product discovery. Create multi-level dropdowns, tabbed menus, and structured layouts with full design control. Highlight products, collections, and promotions directly in menus. Fully customizable, mobile-friendly, and easy to manage without coding. more Create multi-level mega menus with tabs and structured layouts Add products, collections, pages, and banners to improve discovery Customize colors, animations, hover effects, sliders, swipers & recommeded block Highlight key items and promotions using badges and icons Mobile-friendly navigation with 7 flexible layouts and responsive design

5.0(Reviews)

The product page will display variants in a table format with quantity box & add to cart button. C: Product Variants in Table allows you to list product attribute options on a product's details page in a table format with a quantity box and quick add to cart button. Quick add to cart creates positive online shopping experience for customers. Customers can select which product variant(s) they want to purchase, enter the quantity of each variant, and click add to cart to place all product variants and quantities into their shopping cart at once. C: Product Variants in Table allows you to list product attribute options on a product's details page in a table format with a quantity box and quick add to cart button. Quick add to cart creates positive online shopping experience for customers. Customers can select which product variant(s) they want to purchase, enter the quantity of each variant, and click add to cart to place all product variants and quantities into their shopping cart at once. more Provides an eye-catching listing of variants in a tabular format. Provides quick add to cart way for all variants. Easily customize your product table design, stock display, and price visibility. Add custom CSS, show stock status, enable call for price, and style your cart. Multi Language and Multi Currency Support via "Markets".

5.0(Reviews)

By utilizing the C: Year Make Model Search, your customers can efficiently discover products. Our C: Year Make Model Search App enables swift navigation through a vast product catalog across various stores such as Vehicle, Bike, Cars, Boats, Printer, Cartridges, Parts, Audio Systems, Air Conditioning and Electronics parts finder along with Tires and Wheels. Additionally, you can construct personalized search drop-downs according to specific categories such as Year Make Model Sub-Model Engine or Printer Brand Series Model or Wheel Width Diameter Offset for seamless browsing. Our C: Year Make Model Search App enables swift navigation through a vast product catalog across various stores such as Vehicle, Bike, Cars, Boats, Printer, Cartridges, Parts, Audio Systems, Air Conditioning and Electronics parts finder along with Tires and Wheels. Additionally, you can construct personalized search drop-downs according to specific categories such as Year Make Model Sub-Model Engine or Printer Brand Series Model or Wheel Width Diameter Offset for seamless browsing. more Manage YMM rows by adding them one by one or importing via CSV file. Use "Bulk YMM" to assign multiple YMM rows to multiple products at once. Use "Universal Products" to show in each result irrespective of search criteria. Get YMM information inside orders | Fitment Match and Compatibility Chart. URL Redirect Feature (Custom Redirect/Tag Based/Metafields Based Filtering)

4.9(Reviews)

Event calendar for your store, offering view-only, email signups, and the option to buy tickets. Calee helps you easily add Calendar Events to your storefront. You can create multiple event dates and showcase them on a calendar view or as a list view. You can take event signups or link to any product to buy event tickets. You can also import events from Google Calendar. The app is ideal for brands that want to showcase upcoming promotions, workshop calendar, product launches, event registration etc on event calender on their website. Calee helps you easily add Calendar Events to your storefront. You can create multiple event dates and showcase them on a calendar view or as a list view. You can take event signups or link to any product to buy event tickets. You can also import events from Google Calendar. The app is ideal for brands that want to showcase upcoming promotions, workshop calendar, product launches, event registration etc on event calender on their website. more Showcase upcoming events in Calendar View or List View. Set event as view-only, Email Sign Up or link to product to sell event tickets. Import events from Google Calendar. Setup Recurring Events like very month, every week etc. Contact support for customize calendar to match your brand’s aesthetics.

4.8(Reviews)

Put sales, codes and shipping offers where shoppers see them. Clear offers can help lift sales. Callout adds an announcement bar to your store for sales, tap-to-copy discount codes, shipping offers and launches. Choose sticky, rotating, scrolling, countdown or free-shipping goal bars. Pick a goal, or tap Help me choose, to see matching styles, including Black Friday banners and sale styles that run on dates you set. Show bars by page, device and country, schedule start and end dates, translate messages and preview on desktop and mobile. Clicks and impressions are tracked for each bar. Callout adds an announcement bar to your store for sales, tap-to-copy discount codes, shipping offers and launches. Choose sticky, rotating, scrolling, countdown or free-shipping goal bars. Pick a goal, or tap Help me choose, to see matching styles, including Black Friday banners and sale styles that run on dates you set. Show bars by page, device and country, schedule start and end dates, translate messages and preview on desktop and mobile. Clicks and impressions are tracked for each bar. more Sticky, rotating, scrolling, countdown and free-shipping goal bars Pick a goal to get matching styles, from Black Friday banners to sale bars Discount codes shoppers can copy with one tap Show bars by page, device and country, with start and end dates Live desktop and mobile preview, plus click and impression tracking

0.0(Reviews)

Calendly integration enabling pop-up booking buttons on individual pages or site-wide. Calpal: Calendly Integration adds customizable Calendly pop-up booking buttons to your store, directly through your theme editor. In just a few clicks, you can add buttons which allow users to schedule appointments or sign up for your events on Calendly. No-code required. Calpal: Calendly Integration adds customizable Calendly pop-up booking buttons to your store, directly through your theme editor. In just a few clicks, you can add buttons which allow users to schedule appointments or sign up for your events on Calendly. No-code required. more Add Calendly booking buttons to your product (or any other) page Add a floating Calendly booking button to your entire site Customizable design with no-code required

5.0(Reviews)

Hide/Unpublish sold-out & unavailable variants effortlessly from product pages, search & filters Sold-out and unavailable variants clutter your product pages, frustrate shoppers, and end up costing you sales. Camouflage cleans this up to create a smoother shopping experience for your customers. Now with instant variant hiding: Camouflage can unpublish sold-out or unavailable variants or any other variants based on your rules/requirements from your sales channels, making them disappear from product pages, search results, collection filters to help you create smarter, and cleaner storefront. Sold-out and unavailable variants clutter your product pages, frustrate shoppers, and end up costing you sales. Camouflage cleans this up to create a smoother shopping experience for your customers. Now with instant variant hiding: Camouflage can unpublish sold-out or unavailable variants or any other variants based on your rules/requirements from your sales channels, making them disappear from product pages, search results, collection filters to help you create smarter, and cleaner storefront. more Unpublish, hide, disable or strike-through sold-out & unavailable variants Hide/Unpublish any variants with conditions, regardless of inventory Unpublish variants from sales channels of your choice, B2B catalogs and markets Unpublish variants for B2B customers, and from markets Set schedule for unpublishing or hiding of variants

5.0(Reviews)

AI-powered upsell, cross-sell, volume bundles & quantity breaks with built-in cart drawer. Candy Rack displays upsell and cross-sell offers at every stage of the buying journey – product page, cart, checkout, and post-purchase. AI suggests the most relevant products to boost your AOV, powered by your choice of engine, including Google Gemini. New volume bundles and quantity breaks turn single-unit orders into multi-unit ones. It also includes a fast, built-in cart drawer with advanced features like a rewards bar. Built in the EU, no sensitive data collected, fully GDPR-compliant. Candy Rack displays upsell and cross-sell offers at every stage of the buying journey – product page, cart, checkout, and post-purchase. AI suggests the most relevant products to boost your AOV, powered by your choice of engine, including Google Gemini. New volume bundles and quantity breaks turn single-unit orders into multi-unit ones. It also includes a fast, built-in cart drawer with advanced features like a rewards bar. Built in the EU, no sensitive data collected, fully GDPR-compliant. more Offers in 8 different placements: product page, cart, checkout, post-purchase. [NEW] Volume bundles: Tiered quantity pricing on the product page. Cart drawer: Fast slide-out cart with built-in upsell offers and rewards. [NEW] AI mode: Let Candy Rack AI or Google Gemini pick your upsells. A/B testing: Test and optimize your offers to perfection (via Intelligems).

4.9(Reviews)

Shipping protection that boosts revenue. Order protection reduces damage, loss, theft risks. Captain Shipping Protection is a custom order protection solution built for Shopify. Keep package protection premium collections, increase order profits, customize your claims policy—no need for a third-party shipping insurance provider. (We are not an insurance firm and do NOT underwrite plans) Upsell digital products as shipping protection, and secured shipping cart checkout including subscription. Seamlessly switch from other apps and start package assurance from checkout and blocks today! Captain Shipping Protection is a custom order protection solution built for Shopify. Keep package protection premium collections, increase order profits, customize your claims policy—no need for a third-party shipping insurance provider. (We are not an insurance firm and do NOT underwrite plans) Upsell digital products as shipping protection, and secured shipping cart checkout including subscription. Seamlessly switch from other apps and start package assurance from checkout and blocks today! more Offer shipping protection widget at checkout or via app blocks Keep all the shipping protection fees, and add profits when claims are low Route insurance order protection fee back to you & increase your conversion rate Customize the price and style of insurance you want. Multi-language supported The app won't add any codes to your store theme - user friendly

4.9(Reviews)

Boost sales with smart banner slideshows on product & collection pages effortlessly! Carousify lets you create engaging image slideshows for individual product and collection pages to highlight offers, promotions, deals, or product features. Easily upload banners, add clickable links, and customize layouts to match your store’s style. With responsive design and no coding required, Carousify helps you capture customer attention, promote key products, and increase sales seamlessly. This highly targeted approach is key for revenue growth and boosting sales Carousify lets you create engaging image slideshows for individual product and collection pages to highlight offers, promotions, deals, or product features. Easily upload banners, add clickable links, and customize layouts to match your store’s style. With responsive design and no coding required, Carousify helps you capture customer attention, promote key products, and increase sales seamlessly. This highly targeted approach is key for revenue growth and boosting sales more Clickable Banner Slideshow for specific Collection Page & Product details page Easy upload and manage banner images Showcase Target Offers & Set Redirect navigation link for the Slideshow Boost store engagement & conversions

5.0(Reviews)

Easily create irresistible pop-ups and post purchase upsells in order to increase your revenue Cart X is a one click upsell app that allows you to add & manage upsell & cross-sell funnels to reconvert customers. We offer one click upsells (OCU), Pop-up and thank you page in-cart offers. We will help you to Boost your Revenue, Conversion Rate & Average Order Value (AOV). Get your customers rebuy and resell your products easily. Add upsell recommendations, downsells, recharge cross sell, order bump, post checkout upsell, Checkout X upsell, reorder upsells or Free gift with any purchase. Cart X is a one click upsell app that allows you to add & manage upsell & cross-sell funnels to reconvert customers. We offer one click upsells (OCU), Pop-up and thank you page in-cart offers. We will help you to Boost your Revenue, Conversion Rate & Average Order Value (AOV). Get your customers rebuy and resell your products easily. Add upsell recommendations, downsells, recharge cross sell, order bump, post checkout upsell, Checkout X upsell, reorder upsells or Free gift with any purchase. more Add cart pop-up aftersell and Post purchase vitals offers with countdown Easy drag & drop thank you page builder with cross-sell, coupon & discount Reconverting One Click Upsell (OCU), Thank You Page, Checkout Upsell & popup Our analytics allows you to track the best performing funnels & products Sell complementary products, warranties, BOGO, Bundles, Crosells, Upsells & more

5.0(Reviews)

Maximize your store's revenue with cart drawer upsells, exclusive rewards, and seamless add-ons! Maximize your sales effortlessly with cart drawer upsells, rewards, and add-ons. Our app helps merchants elevate their AOV by offering personalized upsells and incentives directly in the cart. Seamlessly integrate rewards and add-ons to enhance the shopping experience and encourage higher spending. Designed for flexibility, our solution ensures a smooth, on-brand experience that keeps customers engaged while driving more revenue. Optimize checkout flow in minutes focus on scaling. Maximize your sales effortlessly with cart drawer upsells, rewards, and add-ons. Our app helps merchants elevate their AOV by offering personalized upsells and incentives directly in the cart. Seamlessly integrate rewards and add-ons to enhance the shopping experience and encourage higher spending. Designed for flexibility, our solution ensures a smooth, on-brand experience that keeps customers engaged while driving more revenue. Optimize checkout flow in minutes focus on scaling. more Add in-cart upselling and cross-selling blocks to maximize your AOV. Drive more purchases with a built-in rewards system and exclusive incentives. Apply add-ons like shipping protection, gift wrapping, and warranties.

5.0(Reviews)

Boost AOV with CartyLabs: In-Cart Upsell, Free Gifts, Rewards & Shipping Bar, Countdown & More Cartylabs Upsell In-Cart supercharges store sales and engagement!. Turn every add-to-cart into revenue with AI-powered Upsell Recommendations, Subscribe & Save, Rewards & Shipping Bars, and Countdown deal. Entice shoppers with Gift Offers, Promo codes, Auto discounts, and more. Build trust with Shipping Estimates and and Ship Protection. Skyrocket Sales with Sticky Add-to-Cart & Quick Buy Now. Enjoy seamless third-party app and theme integrations, real-time analytics, and exceptional support! Cartylabs Upsell In-Cart supercharges store sales and engagement!. Turn every add-to-cart into revenue with AI-powered Upsell Recommendations, Subscribe & Save, Rewards & Shipping Bars, and Countdown deal. Entice shoppers with Gift Offers, Promo codes, Auto discounts, and more. Build trust with Shipping Estimates and and Ship Protection. Skyrocket Sales with Sticky Add-to-Cart & Quick Buy Now. Enjoy seamless third-party app and theme integrations, real-time analytics, and exceptional support! more AI-Upsell Cart: Recommendations Upsells, Rewards, Countdown Deals, Free Gift. Skyrocket Sales with Subscription, Promo, Gift Wrap, Shipping Protection & More Reduce Abandonment with Upsell Offers, Sticky Cart & Cart Reminder Tab Features Boost Sales & Conversions with Quick Buy Now and Sticky Add to Cart Bar Customizable & Personalized Shopping with Real-Time Analytics Behavior& Tracking

5.0(Reviews)

PDF catalogs maker for Wholesale/Retail: catalogs, line sheets & price lists with order forms & SYNC Create professional PDF catalogs for wholesale and retail in minutes. Import Shopify products in one click and build catalogs, line sheets, and price lists with wholesale pricing and order forms — perfect for trade shows and B2B sales. Add variant tables, metafields, QR/barcodes, swatches, and Canva content in A4 or Letter. Convert any catalogs into an interactive flipbook customers can order from, share one cloud link that always stays updated, or print it. No design skills needed. Create professional PDF catalogs for wholesale and retail in minutes. Import Shopify products in one click and build catalogs, line sheets, and price lists with wholesale pricing and order forms — perfect for trade shows and B2B sales. Add variant tables, metafields, QR/barcodes, swatches, and Canva content in A4 or Letter. Convert any catalogs into an interactive flipbook customers can order from, share one cloud link that always stays updated, or print it. No design skills needed. more PDF catalog maker, wholesale/retail catalog maker, line sheet, inventory list Use catalog as wholesale channel with wholesale order form & wholesale prices Show variants, metafields, swatches, galleries, QR codes, and barcodes Import products from collections, b2b catalogs & price lists.Password protection CANVA integration and export. SYNC data in PDF catalog in a 1 min.

4.4(Reviews)

Easily create PDF catalogs, line sheets & flipbooks Catalogly is a PDF catalog maker for product brands and merchants. Create PDF catalogs, wholesale line sheets and interactive flipbooks from your product data - in minutes, without a designer. Choose from 35+ page layouts and set up flexible pricing - wholesale discounts, price overrides or CSV imports. Export as a print-ready PDF or publish as an online flipbook. Refresh everything in one click when products change. Built by a developer who genuinely cares about your results. Catalogly is a PDF catalog maker for product brands and merchants. Create PDF catalogs, wholesale line sheets and interactive flipbooks from your product data - in minutes, without a designer. Choose from 35+ page layouts and set up flexible pricing - wholesale discounts, price overrides or CSV imports. Export as a print-ready PDF or publish as an online flipbook. Refresh everything in one click when products change. Built by a developer who genuinely cares about your results. more Drag and drop, zoom in or out interactive catalog builder Export & Publish Catalogs as PDF downloads or online flipbooks Refresh collections and automate including or excluding products Automatically update prices and product descriptions See click-through analytics

4.6(Reviews)

Reward spend and engagement between purchases. Tailored to your brand and loved by members. Redefine what customer loyalty means for your brand. Reward purchases and keep members engaged between orders with activities, competitions, and challenges. Tailor your points and tier system with sophisticated rules inspired by programs your customers recognize. Reward any activity with multiple rewards and craft a rewards shop where members can use their points. Full design control for widgets across every part of your program. Auto-localized across Shopify Markets and separate Shopify stores. Redefine what customer loyalty means for your brand. Reward purchases and keep members engaged between orders with activities, competitions, and challenges. Tailor your points and tier system with sophisticated rules inspired by programs your customers recognize. Reward any activity with multiple rewards and craft a rewards shop where members can use their points. Full design control for widgets across every part of your program. Auto-localized across Shopify Markets and separate Shopify stores. more Reward orders in any currency. Tailor points, tiers & milestones to your brand. Run competitions and 50+ activities to engage customers between purchases Profiles & zero-party data: Define, collect, and use member preferences and data Reward any action with discounts, free products, badges, and custom rewards Full design control and automatic localization of every widget for every market

5.0(Reviews)

Easily create, upload, and manage unlimited size charts — single or bulk — for all your products Chartify makes it easy to create and manage product size charts for your Shopify store. Ideal for fashion, footwear, and merchandise brands, it helps you display clean, customizable size charts that improve customer trust and reduce returns. With features like bulk uploads, tag-based assignment, and product-based mapping, you have full control through a simple dashboard. Upload one chart or many with ease. Chartify makes it easy to create and manage product size charts for your Shopify store. Ideal for fashion, footwear, and merchandise brands, it helps you display clean, customizable size charts that improve customer trust and reduce returns. With features like bulk uploads, tag-based assignment, and product-based mapping, you have full control through a simple dashboard. Upload one chart or many with ease. more Create and customize size charts for your products with ease Assign size charts to products using tags Upload and manage multiple size charts from a single dashboard Display size charts smoothly on product pages to help customers choose product

0.0(Reviews)

Customize your Thank you and Order status pages. Only Plus merchants can customize checkout. Checkout Builder gives Shopify Plus merchants full control over Checkout with high-converting, extensible blocks. Add upsells, cross-sells, trust badges, custom messaging, dynamic content, and conditional logic—no code required. Built on Shopify Checkout Extensibility, it’s fast, secure, upgrade-safe, and fully compatible with Shopify updates. Design smarter checkout experiences that increase AOV, reduce friction, and convert more customers. Checkout Builder gives Shopify Plus merchants full control over Checkout with high-converting, extensible blocks. Add upsells, cross-sells, trust badges, custom messaging, dynamic content, and conditional logic—no code required. Built on Shopify Checkout Extensibility, it’s fast, secure, upgrade-safe, and fully compatible with Shopify updates. Design smarter checkout experiences that increase AOV, reduce friction, and convert more customers. more Drag-and-drop checkout blocks built on Shopify Checkout Extensibility Upsells and cross-sells to increase AOV at the point of purchase Conditional logic to show content based on cart, customer, or order Add trust badges, custom text, and branded content to checkout Fast, secure, and upgrade-safe with full Shopify Plus compatibility

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.