Cart Upsell—Slide Cart Drawer let you uplift revenue with unlock offers cart upsell & cross sell Uplift sales with Cart Upsell—Slide Cart Drawer to boost sales & aov with cart upsell solution for your store's cart mini cart and cart page. Improve customers' experience by letting them add note, apply discount codes, estimate shipping rates without going to the cart sidebar and cart slidebar to buy more and reduce abandoned cart with free shipping progressive bar, countdown timer, product upsell. Use sale max to increase your average order value with our upselling and cross-selling module. Uplift sales with Cart Upsell—Slide Cart Drawer to boost sales & aov with cart upsell solution for your store's cart mini cart and cart page. Improve customers' experience by letting them add note, apply discount codes, estimate shipping rates without going to the cart sidebar and cart slidebar to buy more and reduce abandoned cart with free shipping progressive bar, countdown timer, product upsell. Use sale max to increase your average order value with our upselling and cross-selling module. more Drag and drop customizable slide cart and cart page builder that fit your theme Slide cart upsell in sale max instead of showing annoying cart popup Create free shipping progressive bar, cart countdown timer Show relevant product recommendations in cart drawer based on the customers cart Product bundle discounts in side cart and double your profit margin
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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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
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.
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
Catalog Maker for Digital/PDF Wholesale & Retail catalogs, LineSheets, Price Lists with order form! A unique marketing & sales tool for B2B/D2C PDF catalog, linesheet & price list stored in the cloud to grow Retail/Wholesale sales. Here is everything you need if you go to the trade show or need a digital/PDF catalog maker for wholesale/retail store. Custom content in catalog: images, QR/barcode, variants table, metafields, wholesale prices, canva content in Letter/A4, table of content, SWATCHES. Convert PDF catalogue to flipbook/lookbook with order form to get draft orders or print catalogue A unique marketing & sales tool for B2B/D2C PDF catalog, linesheet & price list stored in the cloud to grow Retail/Wholesale sales. Here is everything you need if you go to the trade show or need a digital/PDF catalog maker for wholesale/retail store. Custom content in catalog: images, QR/barcode, variants table, metafields, wholesale prices, canva content in Letter/A4, table of content, SWATCHES. Convert PDF catalogue to flipbook/lookbook with order form to get draft orders or print catalogue more Automation first PDF wholesale/retail catalog maker, line sheets, inventory list Unique wholesale channel. Use catalog as wholesale order form & wholesale prices Show variants in atable or as separate product - A4/Letter Auto Table of content Metafeilds, QR/Barcodes, shapes... Import products from catalogs & price-lists *NEW CANVA integration & SYNC data, images & prices in PDF catalog in a few mins
Create a rewards program that rewards spending and keeps your customers engaged between purchases We know that the real value of your customers begins after their first purchase. That is why we help build an exciting program unique to your brand. Easily reward purchases and loyalty activities. Customize your own points and tier system. Host creative competitions and challenges to gather members' content and input and excite your customers. Fully compatible with Shopify Markets, separate Shopify stores, multi-language, and multi-currency. We know that the real value of your customers begins after their first purchase. That is why we help build an exciting program unique to your brand. Easily reward purchases and loyalty activities. Customize your own points and tier system. Host creative competitions and challenges to gather members' content and input and excite your customers. Fully compatible with Shopify Markets, separate Shopify stores, multi-language, and multi-currency. more Host creative competitions and reward participants and selected winners Reward customers for purchases, sharing content, and answering questions Design a points & tiers system and create custom rewards for any occasion Embedded program: Customize the styling of each section and embed in seconds Automatically localized: Correct language and currency for each storefront
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
Powerful App for Checkout Custom Fields, Rules & Customization, Upsells, Conversion, Branding etc. Checkout Extensions Pro integrates seamlessly with Shopify’s Checkout Extensibility framework, enabling AI-powered upsells, dynamic offers, and custom checkout fields (e.g., gift messages). Developers can add trust badges, reviews, banners, and custom UI blocks via extension points. Includes support for post-purchase events, thank-you page surveys, and localized experiences (multi-language, multi-currency, B2B). Optimized for flexibility, performance, and conversion growth. Checkout Extensions Pro integrates seamlessly with Shopify’s Checkout Extensibility framework, enabling AI-powered upsells, dynamic offers, and custom checkout fields (e.g., gift messages). Developers can add trust badges, reviews, banners, and custom UI blocks via extension points. Includes support for post-purchase events, thank-you page surveys, and localized experiences (multi-language, multi-currency, B2B). Optimized for flexibility, performance, and conversion growth. more Turn checkout into a sales booster with AI-driven upsell offers. Stop fake order before they cost you—protect revenue with smart order validation Add custom checkout fields for notes, delivery dates, and gift messages. Avoid delivery mistakes with custom checkout rules based on email, cart, address Hide, show, sort & rename payment & shipping methods by 20+ cart conditions.
Show terms and conditions, return and refund policy on cart page so that there are less chargebacks You can see date and time when the customer has accepted terms. Customize Behaviour how you would like to show terms or refund policy: You can show it in new tab or popup Just install app and configure it in theme customization page. No theme code is modified by the app, it is using latest app blocks feature. You can see date and time when the customer has accepted terms. Customize Behaviour how you would like to show terms or refund policy: You can show it in new tab or popup Just install app and configure it in theme customization page. No theme code is modified by the app, it is using latest app blocks feature. more No Code Required: Store when the terms were accepted within Order page Pop Up Support: Use existing page or create new one and show in pop-up. Customization: Customise the behaviour easily with ultimate options in app. Side Cart Support: Support on cart and side cart page.
Your all-in-one solution for Sweepstakes. Get set up in minutes with customizable widgets! Reward customers for every purchase made, turning everyday transactions into exciting opportunities to win. Set up a sweepstake in minutes with our widgets, banners, and checkout extensions. Encourage higher spending by offering bonus entries at spending criterias. Leverage our referral program, Every shopper receives a personalized referral code to share, helping you attract new buyers organically through word-of-mouth. No coding or product metadata workarounds required. Reward customers for every purchase made, turning everyday transactions into exciting opportunities to win. Set up a sweepstake in minutes with our widgets, banners, and checkout extensions. Encourage higher spending by offering bonus entries at spending criterias. Leverage our referral program, Every shopper receives a personalized referral code to share, helping you attract new buyers organically through word-of-mouth. No coding or product metadata workarounds required. more No-Code customization widgets and banners for seamless integration Purchase-based giveaways configurable (e.g. $1 spent = 1 entry) Upsell customers with spend-based rewards (e.g. spend $100+ unlock more entries) Referral program to turn loyal customers into brand advocates! Send branded post-purchased emails with sweepstake details & referral codes
Add clickable image banners and schedule homepage banners and promotional images easily! Clicky allows you to make image banners clickable. Easily add image banners that link to products, collections, or any pages—no coding required. Additional split banner feature lets you upload two images in one banner, each with its own link, perfect for promoting multiple offers at once. Enjoy various image banner layout and size options, text and button overlay and more! Schedule banner changes ahead of time, so you don't have to worry about switching banners during sales seasons. Clicky allows you to make image banners clickable. Easily add image banners that link to products, collections, or any pages—no coding required. Additional split banner feature lets you upload two images in one banner, each with its own link, perfect for promoting multiple offers at once. Enjoy various image banner layout and size options, text and button overlay and more! Schedule banner changes ahead of time, so you don't have to worry about switching banners during sales seasons. more Clickable image banner with single or split image options Desktop and mobile clickable image banners with own links Various layout options Image Banner Scheduling for automated banner change, ideal for promotions
Drive in-store sales with quality, design, and customization worthy of your brand Closeby makes it easy to create a store locator that perfectly matches your brand. It's how online customers become in-store sales for Shopify businesses with physical locations. Closeby makes it easy to create a store locator that perfectly matches your brand. It's how online customers become in-store sales for Shopify businesses with physical locations. more Configurable: 50+ settings Easy setup: no design or engineering experience required Extensive customization: select design options that best express your brand Beautiful UX: Mobile-friendly, feature-rich and easy to use for customers Integrated: Sync with Google Sheets and Google Analytics for teams
Create fully customizable, mobile-friendly comparison tables for your store Comparing features between multiple products, plans, or offers is a key step in every shopper’s decision process. With Comparison Tables by Common Ninja, you can create clean, responsive tables that present features, specs, and prices side-by-side. Customize the design to match your store, highlight key differences, add call-to-action buttons, and guide customers toward the right choice quickly and confidently. Comparing features between multiple products, plans, or offers is a key step in every shopper’s decision process. With Comparison Tables by Common Ninja, you can create clean, responsive tables that present features, specs, and prices side-by-side. Customize the design to match your store, highlight key differences, add call-to-action buttons, and guide customers toward the right choice quickly and confidently. more Advanced search & sort to help customers quickly find and compare key details. Floating headers keep column and row titles visible while scrolling long tables. Pagination for easy navigation through long, data-rich comparison tables. Import CSV files instantly and turn them into ready-to-use comparison tables. Fully responsive design that adapts beautifully to desktop, tablet, and mobile.
Boost Your Sales with a 1-Click COD Order Form! Add Offers, Upsells & More to Maximize Profits Now! Supercharge your cash-on-delivery store with CodMonster! Enjoy a fast shopping experience with our 1-click customizable COD form. Boost your Average Order Value (AOV) through smart Upsell and Cross-Sell offers while recovering abandoned carts. Track ad performance on Facebook, TikTok, and Google with multi-pixel tracking. Easily integrate with partners like CODPartner and CODNetwork. Take control of your sales and watch your business grow with CodMonster’s powerful, user-friendly tools today! Supercharge your cash-on-delivery store with CodMonster! Enjoy a fast shopping experience with our 1-click customizable COD form. Boost your Average Order Value (AOV) through smart Upsell and Cross-Sell offers while recovering abandoned carts. Track ad performance on Facebook, TikTok, and Google with multi-pixel tracking. Easily integrate with partners like CODPartner and CODNetwork. Take control of your sales and watch your business grow with CodMonster’s powerful, user-friendly tools today! more Customizable Popup/Embedded Form: Create flexible COD forms with field control. Upsell & Cross-Sell Offers: Boost AOV with one-click upsells and quantity offers Multi-Pixel Tracking: Track ads on Facebook, TikTok, Snapchat, and Google. Google Sheets Integration: Sync orders with Google Sheets, Shopify, and apps. Order Limits & Restrictions: Limit orders and restrict form display by country.
Customize your store's announcement bars with targeted messages to engagement and sales Quick Announcement Bars lets you easily create customizable announcement bars to engage your store visitors. With flexible design options, you can adjust colors, background, and text to match your brand. The app offers powerful targeting features, including geolocation, country, product, customer, and keyword targeting, ensuring personalized messages. Conversions and customer engagement by delivering the message at the time Quick Announcement Bars lets you easily create customizable announcement bars to engage your store visitors. With flexible design options, you can adjust colors, background, and text to match your brand. The app offers powerful targeting features, including geolocation, country, product, customer, and keyword targeting, ensuring personalized messages. Conversions and customer engagement by delivering the message at the time more Create and display eye-catching announcement bars effortlessly Customize text, colors, and background to match your store's branding Target specific audiences by location, product, or customer type Set up advanced keyword targeting for precise message delivery Collect custom email to send promotional email by allowing discount
Reduce Variants Options Selection time with Variant Image Swatch, Color Swatch, Swatch on Collection BOOST CONVERSION with Swatch King. Variant image as swatch helps in QUICK COMPARISON of product options. Colour swatches on the collection page make BROWSING SEAMLESS. Price & badges on variant options help in QUICK DECISION. Hide out of stock variants. Choose & customise the variant selector style from a library of color swatches, buttons, etc. Upload color swatches in bulk with CSV. Automate swatches with supaeasy variant image swatch. Talk to our product variations experts for free app setup. BOOST CONVERSION with Swatch King. Variant image as swatch helps in QUICK COMPARISON of product options. Colour swatches on the collection page make BROWSING SEAMLESS. Price & badges on variant options help in QUICK DECISION. Hide out of stock variants. Choose & customise the variant selector style from a library of color swatches, buttons, etc. Upload color swatches in bulk with CSV. Automate swatches with supaeasy variant image swatch. Talk to our product variations experts for free app setup. more Variant Swatches: Color swatches, Custom image swatch, Variant image swatch Variant Picker: Show as Swatches, Buttons & Dropdowns with price, Label & Badges Variants on Collections Page: Add color or size swatches on collections page Bulk upload color swatches. Hide out of stock variants. Split Product Variants Works with Shopify Markets, B2B, Size charts, Filter & Search, Recommendations
Collect product customization details with custom fields before checkout Add a custom order form to collect product customization and personalization details before checkout. Create product options and custom fields that appear only when needed. Customers enter required information on the product page, and all details flow into the cart, confirmation page, and admin order page for easy processing. Here is what Coly currently support: Add a custom order form to collect product customization and personalization details before checkout. Create product options and custom fields that appear only when needed. Customers enter required information on the product page, and all details flow into the cart, confirmation page, and admin order page for easy processing. Here is what Coly currently support: more 9 field types: Textfield, select, date picker, radio box, checkbox & more Form validations: Mandatory fields, minimum and maximum characters Display conditions: Display on selected product by product, vendor, type and tag Export order line properties to CSV or XLSX excel file Theme app extension: Customise your form to match your theme design
Stop sending paid traffic to your homepage. Build dedicated funnels that convert. Sending paid social traffic to your homepage kills conversions. Comet lets you build campaign-specific micro-stores — dedicated landing pages, product pages, and checkout flows that match your ad creative. Products, inventory, and orders sync with Shopify automatically. Each store gets its own URL and tracking. Brands using Comet see major improvements in CAC and conversion rates. Build your first funnel in minutes with drag-and-drop or let AI generate it from your ad. Sending paid social traffic to your homepage kills conversions. Comet lets you build campaign-specific micro-stores — dedicated landing pages, product pages, and checkout flows that match your ad creative. Products, inventory, and orders sync with Shopify automatically. Each store gets its own URL and tracking. Brands using Comet see major improvements in CAC and conversion rates. Build your first funnel in minutes with drag-and-drop or let AI generate it from your ad. more Stop sending ad traffic to your homepage. Give each campaign its own funnel. Products, inventory, and orders sync automatically with your Shopify store. A/B test page variants and route traffic to the winner automatically. Built-in Meta and TikTok pixel tracking. See conversions per campaign.
Banners, Bars, Notifications, Promotions, Announcements, Events ... It's never been easier. Keeping your customers engaged and informed with new business updates and special events is a key element of managing customer relationships. Showing a banner on your website is a simple and effective way of doing this. And Como Banner can help you get it done in seconds. It's never been easier. Let promotions reach your visitors. Convert them into paying customers and generate more sales. Fully customizable to fit your theme. Works perfectly across different screens. Easy to use. Keeping your customers engaged and informed with new business updates and special events is a key element of managing customer relationships. Showing a banner on your website is a simple and effective way of doing this. And Como Banner can help you get it done in seconds. It's never been easier. Let promotions reach your visitors. Convert them into paying customers and generate more sales. Fully customizable to fit your theme. Works perfectly across different screens. Easy to use. more Setup your banners by a few clicks. Create as many as you want. Customize everything on the banner to fit your store theme. Choose how and where to display your banners. Fully responsive, optimized for all screen sizes, desktop, tablet, and mobile. Add one or two action buttons as needed. Keep showing or make it closable.
Help customers compare products and pick the best option with simple and clean specs tables. Introducing CompareXpert: Your ultimate e-commerce companion. Our app simplifies product comparisons, increases conversions, and boosts organic traffic. Perfect for all online merchants, it streamlines the shopping process, making it easier for customers to choose the correct product, ultimately driving sales and growth. Introducing CompareXpert: Your ultimate e-commerce companion. Our app simplifies product comparisons, increases conversions, and boosts organic traffic. Perfect for all online merchants, it streamlines the shopping process, making it easier for customers to choose the correct product, ultimately driving sales and growth. more Smart Product Comparisons: Compare products and provide tailored insights. SEO-Boosted Content: Create SEO-rich comparison content for site traffic. Custom Templates: Tailor tables to match your brand's style. Dynamic Linking: Connect popular and related comparisons for easier navigation.
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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.