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
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.
Looking for the Top Custom CSS Apps?
We've analyzed thousands of custom css apps to identify the top performers based on ratings and install counts.
View Best Custom CSS Apps
Automated collection sorting, AI search, and recommendations - while you curate what matters. Depict makes sure everything in your store is in its right place. With one installation, you can optimize your collection pages, search and recommendations - and keep control to curate your brand. You can start with search, recommendations or merchandising separately, and enable more features as you go. Benefit from the latest AI with a simplified setup and minimal day-to-day maintenance. Depict makes sure everything in your store is in its right place. With one installation, you can optimize your collection pages, search and recommendations - and keep control to curate your brand. You can start with search, recommendations or merchandising separately, and enable more features as you go. Benefit from the latest AI with a simplified setup and minimal day-to-day maintenance. more Collections sort themselves: sold-out down, new arrivals up, pins stay put AI-powered search understands typos, materials, and the shopper's true intent Hyper-relevant product suggestions that match the shoppers journey Drafts, versions and scheduled publishing for collection pages Merchandise each market and each store its own way, from one catalog
Reduce returns & increase sales with smart, customizable size charts & size recommenders Reduce returns and boost sales with Devnzo Size Chart & Size Guide, a Shopify size chart app for clothing, fashion, footwear, jewelry, and accessories. Add unlimited customizable size charts and size guides with smart size recommendations, 25+ templates, images, videos, tabs, auto unit conversion, and multi-language support. Bulk import size charts via Excel or CSV, restore JSON backups, create a dedicated size guide page, Switching apps? We'll migrate your existing size charts. Reduce returns and boost sales with Devnzo Size Chart & Size Guide, a Shopify size chart app for clothing, fashion, footwear, jewelry, and accessories. Add unlimited customizable size charts and size guides with smart size recommendations, 25+ templates, images, videos, tabs, auto unit conversion, and multi-language support. Bulk import size charts via Excel or CSV, restore JSON backups, create a dedicated size guide page, Switching apps? We'll migrate your existing size charts. more 25+ size chart templates with images, videos, tabs & tables — quick setup Smart size recommender & fit finder — help shoppers choose the right size Collection-based size guides that auto-apply and stay synced to new products Bulk import size charts via Excel or CSV — no manual data entry Show size charts as inline, popup, Dropdown, or floating button — as you like
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 Make product discovery faster and more intuitive with powerful filters, predictive search, synonyms, and smart search rules. Help customers narrow results quickly, discover relevant products, and find what they need with fewer steps. Pin or boost key products, hide unwanted results, and redirect searches when needed. Customize swatches and templates to create a polished, consistent browsing experience that helps customers explore your catalog with confidence and reach the right products faster. Make product discovery faster and more intuitive with powerful filters, predictive search, synonyms, and smart search rules. Help customers narrow results quickly, discover relevant products, and find what they need with fewer steps. Pin or boost key products, hide unwanted results, and redirect searches when needed. Customize swatches and templates to create a polished, consistent browsing experience that helps customers explore your catalog with confidence and reach the right products faster. more Build collection and search filters that help customers narrow large catalogs. Add related search terms so customers can find products with different wording. Use search rules to pin, boost, hide, or redirect results for important searches
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.
Boost sales by turning product personalization into revenue with AI powered product design studio Custom product designer tool simplifies product personalization and improves product customization experience that boost conversions on your store. Product customizer tool enhances your web to print store’s experience. Shoppers add images, text, colors, patterns, shapes & cliparts using safe-area indicators and print templates. Create personalized products like t-shirts, mugs, phone cases, and more. Generate print-ready files for POD integration with Printful, Printify and Gelato(Coming Soon). Custom product designer tool simplifies product personalization and improves product customization experience that boost conversions on your store. Product customizer tool enhances your web to print store’s experience. Shoppers add images, text, colors, patterns, shapes & cliparts using safe-area indicators and print templates. Create personalized products like t-shirts, mugs, phone cases, and more. Generate print-ready files for POD integration with Printful, Printify and Gelato(Coming Soon). more Ready to use text, images, cliparts, patterns & product colors & add your own Set custom DPI and get print ready file in PNG, JPG, SVG, AI, PDF, EPS, DXF format Custom pricing for text, images, clip-arts and patterns, tier pricing & minimum order quantity rules Bulk Ordering with Size & Color Variants, Layout Personalization, Remove Image Background with AI Design engraving products in any device with multiple product sides design area
Use shoppable images with Hotspots to increase sales and drive revenue. Boost with image mappers It is more than just a nice banner. Create banners or photo boards (set of images) with shoppable image maps straight from the shop admin. Easily add links to products or pages to the banner and choose 1000 customizable hotspots of any size & color to promote your product better. The hotspots (click points) support the title with an HTML description to add the information and URL to any pixel on an image. Easily include a product image and info in the hover tab. It is more than just a nice banner. Create banners or photo boards (set of images) with shoppable image maps straight from the shop admin. Easily add links to products or pages to the banner and choose 1000 customizable hotspots of any size & color to promote your product better. The hotspots (click points) support the title with an HTML description to add the information and URL to any pixel on an image. Easily include a product image and info in the hover tab. more Instant promotion: Go to the purchase instantly from protoboard or hotspot. Perfect conversion: Users shop products straight from the home or other pages Easy to setup: Customizable icons, icon color, size, and descriptions and popup
Customer-facing file share & file download widget to search, preview & instant download product file Embedded file library with download button for customer. Add product files from Shopify storage as public download files. Customer can browse & search file with search bar, preview PDF file & image; or download them. Share unlimited files like PDF catalog, manual, product PDF, csv price list, product sheet, PDF report, demo video, product spec sheet, lab report, audio download, warranty doc, csv download, certificate. Use case: file download page, doc search resource hub, video download page. Embedded file library with download button for customer. Add product files from Shopify storage as public download files. Customer can browse & search file with search bar, preview PDF file & image; or download them. Share unlimited files like PDF catalog, manual, product PDF, csv price list, product sheet, PDF report, demo video, product spec sheet, lab report, audio download, warranty doc, csv download, certificate. Use case: file download page, doc search resource hub, video download page. more File search bar - Let customer find PDF & other product file with keyword search Image popup & PDF preview alongside download button for other file formats File category - Group downloadable files into categories to keep them organized Customizable widget - Add custom CSS & translated language text as you need Support all file formats for file download like PDF, image, doc, video, csv file
Unlimited product options, conditional logic and dynamic pricing. Now Supercharged with AI API Add any custom option to any product: dropdowns, text fields, swatches, date pickers, file uploads, sliders. Reveal options with conditional logic, charge fixed, percent, tiered or formula-based prices, link values to real Shopify variants, and reuse option templates across your catalog - automatically published by tag or collection. Full JSON API included. Add any custom option to any product: dropdowns, text fields, swatches, date pickers, file uploads, sliders. Reveal options with conditional logic, charge fixed, percent, tiered or formula-based prices, link values to real Shopify variants, and reuse option templates across your catalog - automatically published by tag or collection. Full JSON API included. more Add unlimited custom options with conditional logic and color/image swatches Sell configurable and bundle products with separate SKUs per option value Price anything: fixed, percent, tiered or formula-based calculators Set up options with your favorite AI agent - ChatGPT, Claude, Grok & more Fits any theme or page builder out of the box
Build announcement bars with ready-made templates, targeting, and scheduling. Build bars without code. Browse 413 templates, then customize text, colors, coupons, or buttons. Show bars at the top or bottom, target pages and devices, and use rotating messages or scrolling marquees. Premium adds bars inside product and cart pages, image backgrounds, countdowns, free-shipping progress, email capture, translations, recurring schedules, advanced targeting, analytics, A/B testing, and unlimited bars. Start free with one active bar and no Drip branding. Build bars without code. Browse 413 templates, then customize text, colors, coupons, or buttons. Show bars at the top or bottom, target pages and devices, and use rotating messages or scrolling marquees. Premium adds bars inside product and cart pages, image backgrounds, countdowns, free-shipping progress, email capture, translations, recurring schedules, advanced targeting, analytics, A/B testing, and unlimited bars. Start free with one active bar and no Drip branding. more Browse 413 templates in a searchable gallery Create rotating messages and scrolling marquee bars Add countdown timers and free-shipping progress bars Capture emails from your bar with Shopify or Klaviyo Translate bars into each shopper's language with auto-translate
Easily add a personalized Dropdown list on the cart page. Restrict checkout on selected values. Add a custom dropdown to your cart to collect important customer input before checkout. Use it to tag orders automatically and control whether customers can proceed based on their selection. Ideal for restricting delivery areas, letting customers choose pickup locations, shipping or payment methods, or applying custom conditions—no code or theme edits required. Add a custom dropdown to your cart to collect important customer input before checkout. Use it to tag orders automatically and control whether customers can proceed based on their selection. Ideal for restricting delivery areas, letting customers choose pickup locations, shipping or payment methods, or applying custom conditions—no code or theme edits required. more Easily add a dropdown to your cart page with fully customizable options. Automatically tag orders based on the customer’s selection. Block or allow checkout depending on the selected dropdown value.
Audience-driven upsells, slide cart, subscriptions, ab testing, checkout blocks, and custom widgets. The goal of this app is to increase conversion rate and average order value while offering an unparallel control on personalization. Add checkout blocks and extensions, power a customizable slide cart, bundles, recommendations, upsells, tiered discounts, swap to subscriptions, and reconvert customers to rebuy with 50+ customizable widgets for the entire site. Other features include AB testing, auto free gifts, BOGO, pop ups, one click upsells, post purchase upsells, timers, banners etc. The goal of this app is to increase conversion rate and average order value while offering an unparallel control on personalization. Add checkout blocks and extensions, power a customizable slide cart, bundles, recommendations, upsells, tiered discounts, swap to subscriptions, and reconvert customers to rebuy with 50+ customizable widgets for the entire site. Other features include AB testing, auto free gifts, BOGO, pop ups, one click upsells, post purchase upsells, timers, banners etc. more Personalized in cart upsells and cross-selling, tiered bars, free gifts and more Offer wiser upsells, functions, post purchase upsells, auto add free gift + more Connect segments of audiences to specific widgets for a true personalized store. Reconvert users with simple rebuy offers, bold offers, and swap to subscriptions Includes: Cart, Checkout Extensions, Bundles, BOGO, Free Gift, A/B Testing +
Bundles, quantity breaks, mix & match and upsell popups to lift AOV. Flat price, no revenue share. Sell more with product bundles, quantity breaks, volume discounts, BOGO, fixed bundle prices, mix & match, build-a-box and frequently bought together. Unlock free gifts by tier with a gift picker, plus subscribe & save and free shipping. Show offers by country, B2B, new or returning customer, tag or link. A/B tests keep the winner, AI finds bundle ideas in your orders and a bundle can show as one line in the cart. Upsell popups, post purchase and thank you page offers included. Sell more with product bundles, quantity breaks, volume discounts, BOGO, fixed bundle prices, mix & match, build-a-box and frequently bought together. Unlock free gifts by tier with a gift picker, plus subscribe & save and free shipping. Show offers by country, B2B, new or returning customer, tag or link. A/B tests keep the winner, AI finds bundle ideas in your orders and a bundle can show as one line in the cart. Upsell popups, post purchase and thank you page offers included. more Quantity breaks, BOGO and fixed bundle prices with rounding and a savings line Bundles, mix & match, build-a-box and an all-bundles page; one line in cart Free gifts that unlock by tier, gift picker, subscribe & save, free shipping Show offers by country, B2B, new or returning customer, tag or link; test mode A/B tests keep the winner; AI bundle ideas, upsell popups, post purchase offers
Slide cart drawer & side cart with upsells and free gifts, plus sticky add to cart & checkout rules. Replace your theme's cart with a slide cart drawer built to raise order value. Build it from cards in a live preview: upsells with rules, a rewards bar with free shipping, discount and free gift tiers, add-ons, fees, trust badges and express checkout. Show upsells on product pages and the thank you page too. Hide, rename or reorder payment and shipping methods by rule. Cart A/B tests keep the winner and insights suggest what to improve. Add a sticky add to cart bar and quick buy buttons. Replace your theme's cart with a slide cart drawer built to raise order value. Build it from cards in a live preview: upsells with rules, a rewards bar with free shipping, discount and free gift tiers, add-ons, fees, trust badges and express checkout. Show upsells on product pages and the thank you page too. Hide, rename or reorder payment and shipping methods by rule. Cart A/B tests keep the winner and insights suggest what to improve. Add a sticky add to cart bar and quick buy buttons. more Side cart drawer built from cards in a live preview, with upsells and rules Rewards bar with free shipping, discount and free gift tiers and a rewards list Upsells in the cart drawer, on product pages and on the thank you page Payment and shipping method rules, express checkout rules, fees and add-ons Cart A/B tests and insights, sticky add to cart bar and quick buy buttons
AI-Friendly Custom Product Options & Customizer with Text, File Upload, Add-on, Product Personalizer Max BFCM Sales on product page with product options variants customizer. Add add-on price, custom field, custom text engraving for jewelry, embroidery, POD, gift wrap, laser engraving. Need sales-first custom product personalization customization? Product Personalizer Live Preview brings customer photo upload file, image upload, custom text field textbox real-time to lift customized product sales. Get conditional product variants options, product personalisation, product customizer configurator. Max BFCM Sales on product page with product options variants customizer. Add add-on price, custom field, custom text engraving for jewelry, embroidery, POD, gift wrap, laser engraving. Need sales-first custom product personalization customization? Product Personalizer Live Preview brings customer photo upload file, image upload, custom text field textbox real-time to lift customized product sales. Get conditional product variants options, product personalisation, product customizer configurator. more Product Customization: Personalize items with a product customizer live preview Sales Boosters: Product add-ons upsell, product preview, option badge & discount Conditional Logic: Show/hide product options based on Shopify or custom variants File upload, Image upload, Checkboxes, Dimensions (custom size price calculator) Text box/ Text input/ Custom field, Date Time picker, Dropdown, Image swatch...
Build a Box BYOB, Custom Product Bundles with Mix and Match Bundle Builder, Subscription Box Builder When other product bundle apps struggle to increase AOV, Easify Box Builder makes product bundling easy, flexible and profitable. Create a single or multi-step Build a Box BYOB page with an easy product bundle builder that lets customers mix & match products, enjoy bundle offers & bundle deals. Sell mix n match gift box, gift bundle, custom bundle kits for self care, coffee, snack, meal, pet treat & seasonal custom bundles. Add subscription boxes so your bundle products become recurring revenue. When other product bundle apps struggle to increase AOV, Easify Box Builder makes product bundling easy, flexible and profitable. Create a single or multi-step Build a Box BYOB page with an easy product bundle builder that lets customers mix & match products, enjoy bundle offers & bundle deals. Sell mix n match gift box, gift bundle, custom bundle kits for self care, coffee, snack, meal, pet treat & seasonal custom bundles. Add subscription boxes so your bundle products become recurring revenue. more 30+ Templates: Launch your mix & match bundle builder page in 5 minutes with AI Visual Editor: Add steps & customize page headings, banners, buttons, colors... Bundle Discount: Tiered discount, tiered pricing, volume discount, free gifts Custom Fields: Gift message, gift note, date time, upload, upsell product addons Subscription Bundles: Connect subscription app to build a box with repeat orders
Announce Bar help you to display special offers, discount code, and events in your store. If you want to display Christmas offers to your customers then Announce bar app will help you to display offers on your site. just install the app and configure the app text, size, font, and color according to your requirements. Click on the Save button to publish changes in your store. now your Christmas offer is displayed in your store. * Show your visitors the right message at the right time so they stay in your store longer. * You can display announce bar via country-based on your store. If you want to display Christmas offers to your customers then Announce bar app will help you to display offers on your site. just install the app and configure the app text, size, font, and color according to your requirements. Click on the Save button to publish changes in your store. now your Christmas offer is displayed in your store. * Show your visitors the right message at the right time so they stay in your store longer. * You can display announce bar via country-based on your store. more Display Special offers, Discount Code, Events, Information to your Customers Show the announce bar on selected countries or all countries. Display the bar on selected pages like home, collection, product, or custom page Choose to display the bar per day like Every Time, 1 Time, 2 Time.. etc. Customize the text Announce message, Purchased message, and Success message.
Related Categories
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.