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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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Boost Sales and Ignite Urgency with FOMO Sale Countdown Timer Bar to Increase Conversions! Sales count down timer bar effectively instills a sense of urgency and scarcity in your store. Elevate your customers' FOMO by adding a hurrify countdown timer, pushing them to buy. Create urgency with essential countdown banner or coundown timer, and encourage customers to make a purchase. Maximize your sales during special promotions, flash sales, and seasonal events. Transform your product launches with sales popup countdown time bar or discount timer that build hype and drive early sales. Sales count down timer bar effectively instills a sense of urgency and scarcity in your store. Elevate your customers' FOMO by adding a hurrify countdown timer, pushing them to buy. Create urgency with essential countdown banner or coundown timer, and encourage customers to make a purchase. Maximize your sales during special promotions, flash sales, and seasonal events. Transform your product launches with sales popup countdown time bar or discount timer that build hype and drive early sales. more Countdown timer ultimate tool to highlight limited-time offers with timer cart. Add customizable countdown bars, sales timer to ignite urgency and boost sales. Easily create and customize countdown cart timer to match your brand's style. Set specific triggers & rules when to show the urgency bear without any coding. Track the performance of sale timers & FOMO countdown timer.

5.0(Reviews)

Approve wholesale B2B buyers faster with custom wholesale forms that unlock special pricing. Wholesale Forms is a complete solution for managing B2B and wholesale processes and wholesale inquiry. Build custom multi-step registration forms to collect resale certificates, VAT IDs, or business licenses. Let resellers select preferences like packaging or shipping in the form. Simplify wholesale workflows and create a tailored experience for wholesale customers. Launch your wholesale signup form without coding in under 5 minutes and approve your first B2B customer today! Wholesale Forms is a complete solution for managing B2B and wholesale processes and wholesale inquiry. Build custom multi-step registration forms to collect resale certificates, VAT IDs, or business licenses. Let resellers select preferences like packaging or shipping in the form. Simplify wholesale workflows and create a tailored experience for wholesale customers. Launch your wholesale signup form without coding in under 5 minutes and approve your first B2B customer today! more Build advanced B2B wholesale multi step forms with a drag-and-drop form builder. Embed forms anywhere on your store or trigger them via popup. Ideal for reseller signups, vendor applications, or wholesale club access. Collect VAT IDs, resale certificates, and business licenses to stay compliant. Segment B2B customers based on form responses and approve before granting access

0.0(Reviews)

Effortlessly build custom RSVP forms in minutes and track responses with RSVP Form Builder. RSVP Form Builder is the easiest way to create custom event registration and RSVP forms. Perfect for weddings, conferences, parties, or private sales, it helps you track event sign ups in real time, manage multiple events, and keep everything organized. Customize every field with a simple drag-and-drop editor, match your brand style, and share your form anywhere. Simplify event planning and boost attendance - install today and make event management effortless. RSVP Form Builder is the easiest way to create custom event registration and RSVP forms. Perfect for weddings, conferences, parties, or private sales, it helps you track event sign ups in real time, manage multiple events, and keep everything organized. Customize every field with a simple drag-and-drop editor, match your brand style, and share your form anywhere. Simplify event planning and boost attendance - install today and make event management effortless. more Build custom event registration forms in minutes - no coding needed. Track sign-ups live and manage multiple events effortlessly. Export guest lists to CSV or Excel for easy organization. Fully customize fields, styles, and branding with drag & drop. Add forms anywhere and get real-time response updates instantly.

5.0(Reviews)

Kainic-Plugin makes recommending products simple, and helps you understand customers' needs. With Kainic-Plugin, your customers can view related products to any product, helping to enhance product discovery and improve order value. This app brings recommendation-style features into Shopify, allowing merchants to create a tailored product upsell and recommendation experience. With Kainic-Plugin, your customers can view related products to any product, helping to enhance product discovery and improve order value. This app brings recommendation-style features into Shopify, allowing merchants to create a tailored product upsell and recommendation experience. more Track customer behavior and activity across events. Customize which customer events are tracked. Display a list of recommended products based on customer interaction patterns.

5.0(Reviews)

Show product stock by location, geo-search nearest store for availability, & create location filters A must-have app for merchants using Shopify’s multiple locations or local pickup. Show available and incoming stock by location on product pages, let customers geo-search the nearest store, create smart collections and filters by location, allow store selection, and restrict orders by customer tags. Drive foot traffic, boost sales, and give shoppers full visibility into your inventory across all locations. A must-have app for merchants using Shopify’s multiple locations or local pickup. Show available and incoming stock by location on product pages, let customers geo-search the nearest store, create smart collections and filters by location, allow store selection, and restrict orders by customer tags. Drive foot traffic, boost sales, and give shoppers full visibility into your inventory across all locations. more Display location inventory information on product pages. Create location metafields to build smart collections & filter by availability Access location stock info in liquid using location inventory JSON metafields Let customers choose a specific location to shop from for their orders Restrict locations customers can order from using customer tags - ideal for B2B

5.0(Reviews)

Displays live precious metal prices, ideal for selling fine jewelry, bullions and coins. Keep Up With Metals helps you display real-time precious metal prices directly on your storefront, giving your customers up-to-date information on gold, silver, platinum, and more. Customize the widget to match your store’s style, apply flexible markups, and easily adjust settings. Perfect for stores selling jewelry, bullion, or any metal-based products, this app ensures pricing transparency and improves customer trust, helping drive sales and engagement with minimal setup required. Keep Up With Metals helps you display real-time precious metal prices directly on your storefront, giving your customers up-to-date information on gold, silver, platinum, and more. Customize the widget to match your store’s style, apply flexible markups, and easily adjust settings. Perfect for stores selling jewelry, bullion, or any metal-based products, this app ensures pricing transparency and improves customer trust, helping drive sales and engagement with minimal setup required. more Real-time metal prices for gold, silver, platinum, palladium and more Customizable widget design to match your store’s theme. Flexible markup options: percentage or fixed amount adjustments. Track impressions, clicks, and revenue with built-in analytics dashboard. Seamless integration with Shopify for easy setup and use.

0.0(Reviews)

Create unlimited app options to help merchants increase sales. This app helps you to create infinite product options, which help merchants sell their products and increases sales. Allow shoppers to design their own custom products based on flexible option choices. The function of "option template" can manage options more flexibly. This app is compatible with drawer cart and buy now button. This app helps you to create infinite product options, which help merchants sell their products and increases sales. Allow shoppers to design their own custom products based on flexible option choices. The function of "option template" can manage options more flexibly. This app is compatible with drawer cart and buy now button. more Create unlimited app options to help merchants increase sales. Support ajax cart and "buy it now" Compatible with Online Store 2.0 Themes Flexible and unlimited options template

4.6(Reviews)

Reduce returns and increase sales with clean size charts and AI-powered size recommenders Kiwi helps you remove any sizing uncertainty with customizable size charts and AI-powered fit recommendations that guide shoppers to the right choice. The result? More confident purchases and fewer returns. Add size charts and smart recommendations to any product, from apparel to dog collars. Quick to set up and gives you the flexibility to create a sizing experience that looks professional and fits your brand. Kiwi helps you remove any sizing uncertainty with customizable size charts and AI-powered fit recommendations that guide shoppers to the right choice. The result? More confident purchases and fewer returns. Add size charts and smart recommendations to any product, from apparel to dog collars. Quick to set up and gives you the flexibility to create a sizing experience that looks professional and fits your brand. more Import unlimited size charts from images, product descriptions, or CSV Help customers find their perfect fit with AI-powered size recommendations Add multiple size tables, images, videos, tabs, and more to your size charts Create a product or collection-based size guides that auto-apply to new products Automatically update the sizing unit based on your customer's location

4.8(Reviews)

AI Search & product discovery platform that significantly improves conversion rate and AOV. Perfect for busy merchandising teams, Klevu advanced AI search and recommendations engine helps companies efficiently increase on-site search revenue. Plus, shoppers get personalized product recommendations, and are able to quickly find what they need through our filter and navigation features on product listing pages. Fully compatible with Shopify Markets. With our innovative features, retailers can provide customers with an enjoyable, streamlined shopping experience. Perfect for busy merchandising teams, Klevu advanced AI search and recommendations engine helps companies efficiently increase on-site search revenue. Plus, shoppers get personalized product recommendations, and are able to quickly find what they need through our filter and navigation features on product listing pages. Fully compatible with Shopify Markets. With our innovative features, retailers can provide customers with an enjoyable, streamlined shopping experience. more Advanced AI search and merchandising that learns from your shoppers over time. Easy-to-use merchandising dashboard where you can test and schedule campaigns. Add advanced filtering to product listing pages and manage facets shown. Onsite Search, Merch & Recommendations fully compatible with Shopify Markets. Robust APIs, SDKs and custom storefront documentation, compatible with Hydrogen.

4.9(Reviews)

Add visual menus and product quizzes to guide shoppers to products, collections, and links Add a circle menu bar to your theme section & anywhere in your Shopify 2.0 theme. Create a social media familiar menu to feature products, collections, pages, & links with clean thumbnail navigation. Build collection menus like Instagram stories so shoppers can quickly navigate from collections to specific items. You can also create product quizzes that ask shoppers questions & send them to the right product, collection, or recommendation, helping reduce bounce rate & improve conversion. Add a circle menu bar to your theme section & anywhere in your Shopify 2.0 theme. Create a social media familiar menu to feature products, collections, pages, & links with clean thumbnail navigation. Build collection menus like Instagram stories so shoppers can quickly navigate from collections to specific items. You can also create product quizzes that ask shoppers questions & send them to the right product, collection, or recommendation, helping reduce bounce rate & improve conversion. more Create image-rich menus for collections, products, and any link Show different menu groups by page, collection, product, or campaign Build product quizzes that guide shoppers to the right products Customize circle menu, badges, borders, spacing, layouts, and mobile display Translate menu labels for different storefront languages and markets

5.0(Reviews)

Fashion-Optimized Cart Drawer to Boost AOV: Upsells, Cross-Sell, Rewards, Free Gift & Fast Checkout Kraken Cart helps fashion and apparel stores boost sales with a fully customizable cart drawer. Show in-cart styling suggestions with cross-sells, add upsells, and offer tiered rewards like discounts, free shipping, or gifts. Enable features like shipping protection, subscriptions, discount codes, gift wrap, order notes, and trust badges. Designed to match your brand and deliver a seamless experience across desktop and mobile for better conversions. Easy setup no code required, launch instantly. Kraken Cart helps fashion and apparel stores boost sales with a fully customizable cart drawer. Show in-cart styling suggestions with cross-sells, add upsells, and offer tiered rewards like discounts, free shipping, or gifts. Enable features like shipping protection, subscriptions, discount codes, gift wrap, order notes, and trust badges. Designed to match your brand and deliver a seamless experience across desktop and mobile for better conversions. Easy setup no code required, launch instantly. more Motivate shoppers with in-cart rewards unlocking discounts or gifts. Increase sales with upsells and cross-sells directly in the cart drawer. Offer shipping protection options right within the cart for peace of mind. Enable customers to select subscription plans directly from the cart. Build trust by displaying custom badges directly in the cart interface.

5.0(Reviews)

Drive sales with dynamic content,advanced flows & personalized discounts for product recommendations Lantern AI will help you drive sales and collect essential customer data and preferences with interactive product recommendation quizzes. Our AI will jumpstart your quiz setup with a fully customized, product-matched quiz in under a minute. Choose from multiple-choice, single-choice, opt-in, transition, or input pages and dynamically customize your quiz based on answers. Use A/B testing and offer tailored product matches or need-based routines, with discount incentives to maximize conversions. Lantern AI will help you drive sales and collect essential customer data and preferences with interactive product recommendation quizzes. Our AI will jumpstart your quiz setup with a fully customized, product-matched quiz in under a minute. Choose from multiple-choice, single-choice, opt-in, transition, or input pages and dynamically customize your quiz based on answers. Use A/B testing and offer tailored product matches or need-based routines, with discount incentives to maximize conversions. more Start faster with fully customized TEMPLATES, AI or manual quiz generation. Full versatility with standalone or in-store pages, embed, or popup quizzes Create complex quiz flows with intuitive skip/show logic & custom question paths Capture emails & phone numbers with easy Klaviyo, Omnisend & more integrations Use A/B testing to choose best converting elements, like discounts as incentives

4.9(Reviews)

Enable Latitude marketing widgets on your product and cart pages. Drive more sales on your store. Promote your partnership with Latitude (AU) and Gem (NZ) Interest Free payments as a payment option for your customer to choose. Our long term plans starts from 6 months onwards, depending on your agreement with Latitude. Showing your customers that you provide interest free option at checkout encourages your customers to even shop more at your store by giving them more flexibility on payment terms. Promote your partnership with Latitude (AU) and Gem (NZ) Interest Free payments as a payment option for your customer to choose. Our long term plans starts from 6 months onwards, depending on your agreement with Latitude. Showing your customers that you provide interest free option at checkout encourages your customers to even shop more at your store by giving them more flexibility on payment terms. more Easily enable Latitude widget on your product pages Customise Latitude widget layout with visual preview Set minimum amount for price breakdown to show (for selected promotions only)

0.0(Reviews)

Add a coming soon page for your under construction store & let users know it will be opening soon Running an under construction store? LaunchX under construction app lets you easily create a coming soon page while your store is under maintenance mode, so shoppers know you’re opening soon instead of finding an empty site. Build hype with a launching soon countdown timer showing your launch date and time that tells everyone you’re launching soon. Get pre-built templates for your under construction store & protect your store with password protection & age verification in under maintenance mode. Running an under construction store? LaunchX under construction app lets you easily create a coming soon page while your store is under maintenance mode, so shoppers know you’re opening soon instead of finding an empty site. Build hype with a launching soon countdown timer showing your launch date and time that tells everyone you’re launching soon. Get pre-built templates for your under construction store & protect your store with password protection & age verification in under maintenance mode. more Choose from pre-built customizable coming soon page templates for pre launch Password-protect your launching soon page with a custom pre-loader icon Build hype by adding a countdown timer/ launch timer to your opening soon page Restrict minor users to your under construction page by adding age verification Auto-schedule the coming soon page for your under maintenance mode store

4.8(Reviews)

Allows you to quickly create pages through the layouts from the library and change their content. Customers are busy individuals who do not have time to create the sites they desire. LayoutHub was created to make this easier by providing a library of various high-quality layouts. Customers may rapidly select and adjust the layout that meets their needs. Everything is set up and ready to go in a matter of minutes. The layouts are created by seasoned e-commerce professionals, and they will undoubtedly help you improve your conversion rate. Customers are busy individuals who do not have time to create the sites they desire. LayoutHub was created to make this easier by providing a library of various high-quality layouts. Customers may rapidly select and adjust the layout that meets their needs. Everything is set up and ready to go in a matter of minutes. The layouts are created by seasoned e-commerce professionals, and they will undoubtedly help you improve your conversion rate. more Powerful and direct editor, easy to use for anyone. The library of diverse and professional layouts. Dedicated and professional 24/7 customer support. Compatible with popular 3rd apps. The app is designed with outstanding performance in mind.

4.9(Reviews)

Add a store locator to your storefront. Help customers find where your products are sold offline. Easily add a beautiful and feature rich store locator to your storefront website. Increase your sales by helping your customers find where your products are sold offline. The Store Locator app has the perfect balance of powerful features and an easy to use back-end interface at an affordable price. Easily add a beautiful and feature rich store locator to your storefront website. Increase your sales by helping your customers find where your products are sold offline. The Store Locator app has the perfect balance of powerful features and an easy to use back-end interface at an affordable price. more Get setup quickly with instant installation and bulk location importing. Optimized for mobile and fully responsive. Learn where demand is for your product with powerful search analytics. User friendly interface that automatically finds stores closest to a customer.

3.8(Reviews)

Create shoppable Instagram galleries you can add to any page on your storefront. Add one or more Instagram galleries to your homepage, product page or collection pages using your brand IG photos or UGC you curate. You can showcase photos based on your product collections or only product specific galleries on product pages. Drive user engagement and desire with an interactive Instagram gallery that links directly to products for customers to buy. Add one or more Instagram galleries to your homepage, product page or collection pages using your brand IG photos or UGC you curate. You can showcase photos based on your product collections or only product specific galleries on product pages. Drive user engagement and desire with an interactive Instagram gallery that links directly to products for customers to buy. more Showcase beautiful IG galleries on your homepage, collection or product page. Add product specific galleries on product pages. Link each IG photo to one or more products shown in the photo. Add collection specific galleries to any collection page. Easy install and customization with 2.0 Shopify Themes

5.0(Reviews)

One click upsell and cross sell. Display frequently bought together product upsell & bundles. Add bundle, upsell and cross sell offers from the homepage to checkout, and beyond. The Max LimeSpot Personalizer adds personalization to every product recommendation & 'bought together' bundle. Use our AI bundle builder to create cart upsell, post purchase upsell, or bundle upsell offers. Our tools generate powerful upsell recommendations, cross sell, bundles, and related product suggestion for a quick upsale at checkout. Easily migrate from Addly, Bundler, Selleasy, Aftersell, FBP, or Zoorix. Add bundle, upsell and cross sell offers from the homepage to checkout, and beyond. The Max LimeSpot Personalizer adds personalization to every product recommendation & 'bought together' bundle. Use our AI bundle builder to create cart upsell, post purchase upsell, or bundle upsell offers. Our tools generate powerful upsell recommendations, cross sell, bundles, and related product suggestion for a quick upsale at checkout. Easily migrate from Addly, Bundler, Selleasy, Aftersell, FBP, or Zoorix. more Get a smart product recommendation on any page with an upsell & cross sell offer Personalize every bundle & upsell offer with the LimeSpot Max Personalizer Boost AOV with bought together bundles & related product suggestions at checkout Create a cart upsell or bundle upsell with a data-driven product recommendations Add a post-purchase bundel or upsell offer after checkout, with one-click setup

4.7(Reviews)

Link products as variants. Group products to show swatches in Combined Listings and keep SEO URLs LinkedOption (formerly King Linked Options) links separate products as variants with color swatches or image swatches on product pages and product cards. Product grouping for combined listings. Group products as image variant siblings. Customize swatch styles with flexible options. Unique variant titles and descriptions for SEO, create product groups in bulk, and combine product listings with multi-option swatches. Auto-hide unavailable items. LinkedOption (formerly King Linked Options) links separate products as variants with color swatches or image swatches on product pages and product cards. Product grouping for combined listings. Group products as image variant siblings. Customize swatch styles with flexible options. Unique variant titles and descriptions for SEO, create product groups in bulk, and combine product listings with multi-option swatches. Auto-hide unavailable items. more Link separate products as variants with their own SEO-friendly URLs. Show color or image swatches on product pages and collection cards. Bulk-create product groups from titles, SKUs, tags, or collections. Hide unavailable options and keep product switching clean. Import/export CSVs to manage large product catalogs.

5.0(Reviews)

Link Products of different Colors using Customizable Color and Image Swatches. Linkify Product Colors lets you connect separate products as color options using swatches. Instead of using variants, each color can exist as its own product. This allows unique images, descriptions, prices, and inventory while helping SEO and discoverability. Create unlimited product groups and swatches, and display them on product pages and collection grids. The app can automatically detect color names, highlight the active product, and hide unavailable swatches. Linkify Product Colors lets you connect separate products as color options using swatches. Instead of using variants, each color can exist as its own product. This allows unique images, descriptions, prices, and inventory while helping SEO and discoverability. Create unlimited product groups and swatches, and display them on product pages and collection grids. The app can automatically detect color names, highlight the active product, and hide unavailable swatches. more Avoid Shopify’s variant limits by using separate products for each color. Each product can have it own pictures, description, prices... Display color swatches on product pages and collection product grids. Use solid colors, image swatches, or product images automatically. Customize swatch style, size, shape, tooltip, and display behavior.

4.7(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.