Sell custom built products with unlimited option permutations, conditional logic, text & artwork The most powerful customization platform - complete ecosystem. Easy to use interface + AI assistant. Live preview usually drives 30%-50% higher order value. Unmatched features: Text, images, colors, conditional logic, bundles, inventory tracking, price formulas etc. - all in one platform. Integrates with any ERP System. Perfect for jewelry, hardware, sports equipment, apparel, phone cases, home decoration. No risk. 24/7 support. Scalable infrastructure on Google Cloud. The most powerful customization platform - complete ecosystem. Easy to use interface + AI assistant. Live preview usually drives 30%-50% higher order value. Unmatched features: Text, images, colors, conditional logic, bundles, inventory tracking, price formulas etc. - all in one platform. Integrates with any ERP System. Perfect for jewelry, hardware, sports equipment, apparel, phone cases, home decoration. No risk. 24/7 support. Scalable infrastructure on Google Cloud. more Offer 'Build Your Own Product' Experience w/ Live Preview From Every Angle. Upload Photos / Artwork / Logos / Monograms / Text & Almost Any Other File Type. Unlimited Variant Permutations. Robust SKU Constructor & Inventory Tracking. Interactive Printable Areas For Embroidery, Print On Demand & Neon Signs. Customizable via CSS/JS to Match Brand Design. API For External Systems.
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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Create Upsell & cross-sell bundles with discounts to achieve higher sales Cross-sell upsell master offers a wide range of widgets to the customer in which different bundles/funnels can be created with discounts and special offers like percentage discounts or fixed off from the total product prices. The app offers multiple ways like bundle offers, volume discounts, and frequently bought-together offers of the products in simultaneous ways. Also, the app offers some special discounts for a selected group of products to generate higher sales. Cross-sell upsell master offers a wide range of widgets to the customer in which different bundles/funnels can be created with discounts and special offers like percentage discounts or fixed off from the total product prices. The app offers multiple ways like bundle offers, volume discounts, and frequently bought-together offers of the products in simultaneous ways. Also, the app offers some special discounts for a selected group of products to generate higher sales. more Multiple upsell & cross-sell discount bundles can be created on different pages Create bulk quantity discounts, upsell frequently brought together products Fully customizable template to match store color theme
Build Unlimited Forms with ease and hassle-free. No limits and no restrictions on using any feature. * Fully Customize the fields and the look and feel * Can store form submissions in App or email or both. * Setup email recipients for form submissions * Set optional Auto-Responders for all of your forms * Mobile responsive. * Enable Captcha to prevent fraudulent form submissions. * Use SMTP to send all emails. * Mailchimp Integration * Accept Payments with Stripe and PayPal. * Google Analytics * Webhooks * Export Form Submissions in an excel sheet. * Customize redirect URL after form submission * Fully Customize the fields and the look and feel * Can store form submissions in App or email or both. * Setup email recipients for form submissions * Set optional Auto-Responders for all of your forms * Mobile responsive. * Enable Captcha to prevent fraudulent form submissions. * Use SMTP to send all emails. * Mailchimp Integration * Accept Payments with Stripe and PayPal. * Google Analytics * Webhooks * Export Form Submissions in an excel sheet. * Customize redirect URL after form submission more We help you to save your time in building a custom and advanced form in minutes. Embed form anywhere by short code. Email alerts to admin and customer on form submissions.
Product customizer that makes it easy for Print on Demand stores to sell personalized products. Customall is the ultimate product personalizer for Print on Demand (POD) store, designed to maximize efficiency & boost sales. With Customall, you can easily set up custom products, offering a wide range of personalization options for your customers. Our app connects with leading Print partners like Dreamship, Printify, Printway, Printful, Gearment to automate fulfillment. Plus, real-time previews ensure that your personalized products convert easily with less return. Customall is the ultimate product personalizer for Print on Demand (POD) store, designed to maximize efficiency & boost sales. With Customall, you can easily set up custom products, offering a wide range of personalization options for your customers. Our app connects with leading Print partners like Dreamship, Printify, Printway, Printful, Gearment to automate fulfillment. Plus, real-time previews ensure that your personalized products convert easily with less return. more Personalization options: custom texts, custom photo upload, clipart... Support text effects, background remover, face cutout... Create products with QR codes, star maps, calendars, and puzzle generators Let customers see design changes in real-time preview before they add to cart Automatically generate high-resolution files for manual or auto-fulfillment.
Powerful POD designer and online customization features for your personalized products. CustoMeow is an online customization tool built for personalized products. Seamlessly integrate the POD Designer into your store, Deliver a true personalized customization experience for your customers, Ensure your personalized orders are fulfilled easily and reliably. CustoMeow is an online customization tool built for personalized products. Seamlessly integrate the POD Designer into your store, Deliver a true personalized customization experience for your customers, Ensure your personalized orders are fulfilled easily and reliably. more True WYSIWYG with 2D, 3D, and high-fidelity mockup previews. Powerful features for apparel, gifts, and more—meeting all customization needs. AI image filters integration unlocks endless creative possibilities. Auto-generated production files sent to factories for maximum efficiency. 10+ years in personalization, always improving to meet your needs.
No-code A/B Testing and Website Personalization CRO platform built for marketers CustomFit.ai is an easy no-code platform for marketers for A/B testing, personalization, and popups. Easily run A/B tests on any page—product pages, home page, checkout page—to identify what drives the most sales. Beyond modifying existing content, you can add new content blocks with drag-and-drop simplicity, such as UGC video reels, recently viewed or purchased items, and more. Leverage AI Machine Learning to optimize conversion rates (CRO), boost revenue, and enhance upselling strategies CustomFit.ai is an easy no-code platform for marketers for A/B testing, personalization, and popups. Easily run A/B tests on any page—product pages, home page, checkout page—to identify what drives the most sales. Beyond modifying existing content, you can add new content blocks with drag-and-drop simplicity, such as UGC video reels, recently viewed or purchased items, and more. Leverage AI Machine Learning to optimize conversion rates (CRO), boost revenue, and enhance upselling strategies more AI Conversion Optimization: Leverage Machine Learning to optimize conversions No code, A/B Testing, Split URL testing, Theme A/B testing, and A/B/N testing Easy to use No code visual editor to personalize product pages & landing pages Add new blocks like Video Reels, Recently Viewed items, and more via drag-n-drop SEO-friendly with fast performance and a flicker-free experience.
All In One Personalizer & Customizer with Live Previews & Auto Fulfillment for Any Kind of Store! Sell customized products with Customily, a high converting product personalizer and customizer for ecommerce. Works for print on demand, engraved jewelry, custom apparel, personalized gifts, laser cut items, and beyond. Let shoppers customize and personalize products in real time using text, photos, calendars, AI filters, and more, with live preview customization they will trust and love. Automatically customize orders, generate print ready files, and scale customization with top POD providers. Sell customized products with Customily, a high converting product personalizer and customizer for ecommerce. Works for print on demand, engraved jewelry, custom apparel, personalized gifts, laser cut items, and beyond. Let shoppers customize and personalize products in real time using text, photos, calendars, AI filters, and more, with live preview customization they will trust and love. Automatically customize orders, generate print ready files, and scale customization with top POD providers. more Add text, photos, AI filters, clipart & product options. Live preview included! Import from Canva, background removal, FaceCut, AI effects & mockup generator Auto generate print ready, laser cut & engraving files. Zero manual work! Direct POD integration: Printful, Printify, Gelato, ShineOn, CustomCat & more Multi language support team with Live Chat, onboarding calls & training included
Boost sales with Instant Buy, Offer Bundles, Buy X Get Y, free shipping bar, Trust Badges & popups Boost AOV using creates urgency & fomo on flash sale and show visitors that items are limited & selling fast. Customise it easily to match your brand with our simple bundle builder. Add convenience & upsell with free shipping bar & sticky add to cart in sales season. Features include: Multi Sales Notifications, Low Stock Countdown Bar, Countdown Timer, Sold Counter, Sales Popup, Quick View, Trust Badges, Free Shipping Bar, Announcement Bar, Sticky Cart Drawer & Buy X Get Y & instant Buy Buttons. Boost AOV using creates urgency & fomo on flash sale and show visitors that items are limited & selling fast. Customise it easily to match your brand with our simple bundle builder. Add convenience & upsell with free shipping bar & sticky add to cart in sales season. Features include: Multi Sales Notifications, Low Stock Countdown Bar, Countdown Timer, Sold Counter, Sales Popup, Quick View, Trust Badges, Free Shipping Bar, Announcement Bar, Sticky Cart Drawer & Buy X Get Y & instant Buy Buttons. more Sales Pop up - Recent Sales Notification boost sales, build trust & social proof Show frequently bought products (FBT), related products, product recommendations Low Stock Countdown & Sold Counter create scarcity, boost sales & add to cart PROMO BAR: promote campaign and show announcement with Promotional Bar Revenue-Oriented: track additional revenue generated by free shipping bar.
Easily add customized age checks, prevent content theft, and block unwanted traffic by IP or country Dashi Security Suite makes store protection easy. Quickly set age verification pop-ups tailored by product or region, prevent content theft by disabling copy-paste and right-click actions, and easily block or redirect visitors by IP address or country. Perfect for regulated industries or merchants prioritizing security, Dashi helps you stay compliant, protect your valuable content, and control store access—all without technical hassle. Dashi Security Suite makes store protection easy. Quickly set age verification pop-ups tailored by product or region, prevent content theft by disabling copy-paste and right-click actions, and easily block or redirect visitors by IP address or country. Perfect for regulated industries or merchants prioritizing security, Dashi helps you stay compliant, protect your valuable content, and control store access—all without technical hassle. more Flexible age verification on specific pages or by country with customized design Disable copy, right-click, and developer tools to protect content Prevent fraudulent orders by blocking high-risk countries, IPs, and bots
Easily add and customize size charts & guides to help customers find the perfect fit. Create clean, responsive size charts for any product and customize them with text, images, and tables. Perfect for apparel, shoes, and detailed body measurements. Improve conversions and reduce returns with fit finders. The app is compatible with Hydrogen stores and works with any 2.0 theme. We've provided 11 presets for quick setup, along with an easy-to-follow guide to get started. Create clean, responsive size charts for any product and customize them with text, images, and tables. Perfect for apparel, shoes, and detailed body measurements. Improve conversions and reduce returns with fit finders. The app is compatible with Hydrogen stores and works with any 2.0 theme. We've provided 11 presets for quick setup, along with an easy-to-follow guide to get started. more Compatible with any 2.0 themes and Hydrogen stores Quick setup with 11 size chart presets Unit conversion ability between inch and cm Select size charts based on customer's location Floating and inline buttons to display
Get a Discount Box on your cart. Minimise your abandoned cart and maximise your conversion rate. Our app is designed to help online stores reduce cart abandonment rates and increase conversion rates. By offering a customisable discount box on the cart page, customers are more likely to complete their purchase, knowing they can apply the code at the right place and time. Our app seamlessly integrates with your store and helps your customers easily find and apply a coupon code directly in the cart. With our app, you can improve your customer's shopping experience and enhance your sales. Our app is designed to help online stores reduce cart abandonment rates and increase conversion rates. By offering a customisable discount box on the cart page, customers are more likely to complete their purchase, knowing they can apply the code at the right place and time. Our app seamlessly integrates with your store and helps your customers easily find and apply a coupon code directly in the cart. With our app, you can improve your customer's shopping experience and enhance your sales. more Supports cart page and cart drawer Easy to install and setup the discount box Allows you to create and display multiple discount boxes on various pages Supports discount share links.
SVG Web Component to render and animate clock dials. Includes counter functionality and a JS API. DeDial is a set of Web Components whose primary purpose is to draw circular dials, counters, and timers. Dials can be used to represent animated gauges, or the ticks on a clock dial, or segments of a targeting sight. Additionally, animated countdowns can be initiated to add a more dynamic feel to any store. These components are intended for use by Theme designers, or advanced users familiar with CSS, that are looking to compose custom animations within the Theme Editor. DeDial is a set of Web Components whose primary purpose is to draw circular dials, counters, and timers. Dials can be used to represent animated gauges, or the ticks on a clock dial, or segments of a targeting sight. Additionally, animated countdowns can be initiated to add a more dynamic feel to any store. These components are intended for use by Theme designers, or advanced users familiar with CSS, that are looking to compose custom animations within the Theme Editor. more Render varied circular dials for static or animated displays, and clock faces. Animated forward and reverse counter with optional JavaScript interface. Smooth SVG scaling and CSS support from the theme editor.
Reduce friction to checkout by displaying an estimated delivery date on your product pages. Facing low add-to-cart rates and conversions? Uncertainty around delivery times can deter customers, creating friction at checkout. Delivery Timer is your solution. It displays clear delivery estimations and shipping times, tailored to your store's specific order by, cut-off, and dispatch times. Set up geolocation zones for accurate delivery details across countries and states. Includes geolocation for accuracy, custom rules for varied products, and customization to suit your store's design. Facing low add-to-cart rates and conversions? Uncertainty around delivery times can deter customers, creating friction at checkout. Delivery Timer is your solution. It displays clear delivery estimations and shipping times, tailored to your store's specific order by, cut-off, and dispatch times. Set up geolocation zones for accurate delivery details across countries and states. Includes geolocation for accuracy, custom rules for varied products, and customization to suit your store's design. more Reduce friction to checkout with clear shipping & delivery information Display a beautiful "get it by" countdown & delivery timer on your store Communicate a clear visual timeline from order placed to order received Create rules for products & collections with different lead times Motivate buyers to place orders and increase sales
Power your storefront with shoppable social content and personalized product recommendations. DialogueAI transforms static storefronts into interactive shopping experiences using shoppable Reels and Storyteller modules. The platform uses advanced visitor segmentation to deliver personalized content and dynamic product recommendations in real time. Merchants can manage high-engagement visual commerce and intelligent upsells through a no-code visual editor. Get comprehensive insights and automated analysis to drive higher engagement, maximize average order value, and scale store growth. DialogueAI transforms static storefronts into interactive shopping experiences using shoppable Reels and Storyteller modules. The platform uses advanced visitor segmentation to deliver personalized content and dynamic product recommendations in real time. Merchants can manage high-engagement visual commerce and intelligent upsells through a no-code visual editor. Get comprehensive insights and automated analysis to drive higher engagement, maximize average order value, and scale store growth. more Showcase product transformations with interactive Before & After image sliders. Turn social content into sales with shoppable Reels and Storyteller modules. Deliver tailored banners and content based on real-time visitor behavior. Increase AOV with smart product recommendations and automated checkout bundles. A/B testing - Redirect URLs, CTAs, Banners, Texts or designs and ab test Apps
Boost sales with products filter and instant search If you are searching for a way to boost your stores performance by using product filter, collection filter or instant search and suggestions then "Advanced filters & Search" system could be your answer. Using this application, customers can search for products using multiple filters located on collections and search pages. If you are searching for a way to boost your stores performance by using product filter, collection filter or instant search and suggestions then "Advanced filters & Search" system could be your answer. Using this application, customers can search for products using multiple filters located on collections and search pages. more Collection page product filter Instant Search suggestions User friendly customizations
Prominently display a sale, discount code, event, or special promotion to drive customer engagement! Use a quick announcement bar to display a sale, event, or special promotion to your store visitors. In just one click, you can add a top or bottom Announcement Bar to highlight key information for your customers. Discount Announcement Bear has built-in, fully customizable layouts, fonts, and colors to match your brand perfectly. Our announcement bar layouts adapt to look amazing on any device! You can even add some custom CSS to create the design of your dreams. Try it today! Use a quick announcement bar to display a sale, event, or special promotion to your store visitors. In just one click, you can add a top or bottom Announcement Bar to highlight key information for your customers. Discount Announcement Bear has built-in, fully customizable layouts, fonts, and colors to match your brand perfectly. Our announcement bar layouts adapt to look amazing on any device! You can even add some custom CSS to create the design of your dreams. Try it today! more Highlight your store discounts & promotions with our stunning announcement bar. Customize your announcement bar by country and by product. Total design control to easily match your store's branding. Get very detailed with design by using the custom CSS feature.
Run promotions like a pro. Provide personalized incentives to your customers to increase AOV. Discount Ninja is a promotion engine that allows you to quickly set up promotions that convert. View real-time reports to know exactly how the app is growing your average order value. Personalized promotions come to life everywhere in your online store (product page, collections, cart and checkout). The app includes widgets to communicate your promotions to your audience throughout the buyer journey. They blend into your shop and allow you to stay on brand while you increase conversion. Discount Ninja is a promotion engine that allows you to quickly set up promotions that convert. View real-time reports to know exactly how the app is growing your average order value. Personalized promotions come to life everywhere in your online store (product page, collections, cart and checkout). The app includes widgets to communicate your promotions to your audience throughout the buyer journey. They blend into your shop and allow you to stay on brand while you increase conversion. more Combine & stack multiple offers: BOGO, free gift, tiered & volume discounts etc. Schedule promotions to start and stop automatically. Easily exclude collections or discounted products from sales. Offer private promotions to VIP customers using a discount link. Unlock the power of Shopify Functions for a scalable and native experience.
Revolutionize Product Search and Discovery with Doofinder. Doofinder is the AI Search & Discovery platform for eCommerce that helps customers quickly find exactly what they need. Whether searching, browsing or chatting with the store. Its technology understands real intent and turns every interaction into a sales opportunity. It serves as a conversational AI layer, boosting conversion, revealing what customers want, what they can’t find, and where the biggest growth opportunities lie. Plug-and-play. No development required. See results from day one. Doofinder is the AI Search & Discovery platform for eCommerce that helps customers quickly find exactly what they need. Whether searching, browsing or chatting with the store. Its technology understands real intent and turns every interaction into a sales opportunity. It serves as a conversational AI layer, boosting conversion, revealing what customers want, what they can’t find, and where the biggest growth opportunities lie. Plug-and-play. No development required. See results from day one. more AI Assistant: Shoppers ask. Your AI answers, guides, and converts. AI Search: Runs on autopilot. Understands intent. Improves daily. Stats & Optimization: Revenue insights that turn search gaps into more sales. Recommendations: AI-driven suggestions that boost AOV from day one. Category Merchandising: Right products first. Zero dev work needed.
Customer-facing file share & download widget to instant search, preview & instant download PDF etc Embedded file library widget to create a file downloader page, doc search resource hub, or private file list for customer. Add files directly from Shopify storage & list them as free digital download files. Customer can instant search file with built-in search bar, preview PDF file & image; or download them. Share unlimited files like PDF catalog, manual, price list, datasheet, product sheet, CSV, PDF reports, ebook, product spec sheets, lab report, audio download, PDF certificate. Embedded file library widget to create a file downloader page, doc search resource hub, or private file list for customer. Add files directly from Shopify storage & list them as free digital download files. Customer can instant search file with built-in search bar, preview PDF file & image; or download them. Share unlimited files like PDF catalog, manual, price list, datasheet, product sheet, CSV, PDF reports, ebook, product spec sheets, lab report, audio download, PDF certificate. more File search bar - Let customer find PDF & downloadable files with keyword search File Preview - PDF preview & image preview for customer before downloading File category - Group downloadable files into categories to keep them organized Customizable widget - Add custom CSS & translated language text as you need Supports all file formats for file download like PDF, image, doc, video, audio
Create product options with swatches & price calculators. Sell product bundles and discount upsells Dynamic Product Options is an app to manage customizable product options. Create configurable and bundle products of any complexity. Add math formulas and build your own price calculators. The app supports dependent/conditional custom options, templates, color and image swatches, quantity and tier prices for options, onetime fees, tooltips, absolute pricing, options for customer groups, mathematical formula pricing and much more. Dynamic Product Options is an app to manage customizable product options. Create configurable and bundle products of any complexity. Add math formulas and build your own price calculators. The app supports dependent/conditional custom options, templates, color and image swatches, quantity and tier prices for options, onetime fees, tooltips, absolute pricing, options for customer groups, mathematical formula pricing and much more. more Create unlimited custom options with conditional options and color swatches Create configurable and bundle products with separate SKUs Create price calculators of any complexity using your custom math formula The app has an intuitive UI and a lot of features The app can be integrated into any theme or page builder
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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.