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Custom CSS Shopify Apps

Discover the best Custom CSS apps for your Shopify store in 2025. Compare features, pricing, and reviews to find the perfect solution.

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Easily add stores, provide powerful filters and search, and get useful insights from your users Mapstore is a modern store locator app that helps businesses manage and display locations effortlessly. Perfect for retail stores, franchises, and service providers, it allows bulk uploads, easy customization, and powerful search and filtering. No API keys are required. With a user-friendly interface, responsive design, and powerful features like map themes and developer API, Mapstore improves customer navigation and drives in-person visits. Simple, scalable, and optimized for performance. Mapstore is a modern store locator app that helps businesses manage and display locations effortlessly. Perfect for retail stores, franchises, and service providers, it allows bulk uploads, easy customization, and powerful search and filtering. No API keys are required. With a user-friendly interface, responsive design, and powerful features like map themes and developer API, Mapstore improves customer navigation and drives in-person visits. Simple, scalable, and optimized for performance. more Simple Setup - No 3rd party API keys or integrations required Interactive Store Map - Display your stores on a searchable, dynamic map Easy Store Management - Add, edit, and update store locations in minutes Customizable Design - Match map styles and features with your store's branding Powerful filters - Allow your users to find locations with ease

4.0(Reviews)

Run personalized offers, upsells, tiered and timed discounts on your cart (Black Friday ready) AI Smart Cart enables merchants to optimise cart completion rates and improve AOV with personalized upsells, offers & discounts. Tailored for Plus merchants looking for advanced cart customisation, and ability to run freebies, tiered promotions, timed discounts, behavioral offers, custom rewards & incentives for improving sales and basket size. Using real-time analytics, it captures and analyzes browse behavior, enabling precise, tailored offers that customers are most likely to purchase. AI Smart Cart enables merchants to optimise cart completion rates and improve AOV with personalized upsells, offers & discounts. Tailored for Plus merchants looking for advanced cart customisation, and ability to run freebies, tiered promotions, timed discounts, behavioral offers, custom rewards & incentives for improving sales and basket size. Using real-time analytics, it captures and analyzes browse behavior, enabling precise, tailored offers that customers are most likely to purchase. more Upsell & Cross Sell : Personalized Offers, Discounts, Upsells & Cross Sells Tiered Offers, Freebies, Coupons, Gifts & Customizable Discounts Realtime analytics, Integrations with Klaviyo and Other Email / SMS tools

0.0(Reviews)

Mecaparts simplifies auto parts management and ensures vehicle compatibility, boosting your sales. Mecaparts simplifies auto parts management for Shopify merchants by providing seamless integration with TecDoc. It ensures vehicle compatibility, making it easier for customers to find the right parts. Merchants can import, manage, and publish products with just a few clicks. The app supports both TecDoc and non-TecDoc products, offering flexibility for a complete catalog. With an intuitive vehicle selection module, Mecaparts optimizes store efficiency and boosts sales effortlessly. Mecaparts simplifies auto parts management for Shopify merchants by providing seamless integration with TecDoc. It ensures vehicle compatibility, making it easier for customers to find the right parts. Merchants can import, manage, and publish products with just a few clicks. The app supports both TecDoc and non-TecDoc products, offering flexibility for a complete catalog. With an intuitive vehicle selection module, Mecaparts optimizes store efficiency and boosts sales effortlessly. more Ensure part-to-car matching with seamless Shopify vehicle selection integration. Manage, add, edit and update thousands of auto parts in your Shopify store. Get real-time access to millions of auto parts, vehicles, and manufacturer data. Easily organize products into categories for faster and more efficient browsing. Access images, PDFs, and videos for detailed auto part information and support.

0.0(Reviews)

Easily take booking from customer as calendly. Calendar appointment booking app for service & event. Meety is a user-friendly booking app that seamlessly adds a scheduling calendar to your products, just like Calendly. Perfect for physical and virtual locations (Zoom, Google Meet, Outlook), Meety handles subscriptions, group bookings, and deposits payments. With Google Calendar sync, automated waitlists, and personalized email notifications, Meety streamlines your appointment booking process. Plus, multi-language support and custom question forms make it ideal for all your scheduling needs. Meety is a user-friendly booking app that seamlessly adds a scheduling calendar to your products, just like Calendly. Perfect for physical and virtual locations (Zoom, Google Meet, Outlook), Meety handles subscriptions, group bookings, and deposits payments. With Google Calendar sync, automated waitlists, and personalized email notifications, Meety streamlines your appointment booking process. Plus, multi-language support and custom question forms make it ideal for all your scheduling needs. more Add "Schedule your time" button to product, allow customer to book appointment Set up appointment duration, buffer time, preparation time, limit timeslot Flexible options: Group, Subscription, No check-out booking, Waitlist, Deposit Automated email notifications. 2-way sync with Google Calendar, Zoom, Outlook Virtual & in-person appointment. Customer portals for reschedule, cancel booking

4.9(Reviews)

Elevate sales effortlessly: Product Countdown timers for FOMO, urgency, and increased conversions. Create the effect of Urgency, Scarcity, and FOMO in sales by adding a countdown widget, aka deadline time tracker & stopwatch. Display timers strategically as top/bottom bars, on product pages, or collections. Select design presets for quick setup to match your theme and translate text to match your store language. Improve conversion rates and average order value (AOV) of Flash Sales, Seasonal Sales, Daily Deals, Promotions, Holiday Sales, Product Releases, and Launches. Great for Ramadan Sales Create the effect of Urgency, Scarcity, and FOMO in sales by adding a countdown widget, aka deadline time tracker & stopwatch. Display timers strategically as top/bottom bars, on product pages, or collections. Select design presets for quick setup to match your theme and translate text to match your store language. Improve conversion rates and average order value (AOV) of Flash Sales, Seasonal Sales, Daily Deals, Promotions, Holiday Sales, Product Releases, and Launches. Great for Ramadan Sales more Encourage store visitors and motivate buyers to buy now with fear of missing out You can make the sales countdown timer appear for specific products only Use an announcement bar timer (top bar or bottom) for Storewide Sales Add countdowns to many places on your websites to highlight limited-time offers Supports all pages, 1-click setup, no coding required, many converting presets

0.0(Reviews)

Story Style Menu to feature products, collections and links in Instagram like icon based navigation Great for shops who want to create social media story like menu to feature products, collections, pages, and links. Circle or square thumbnail navigation menu to redirect customers from collections to specific items. Familiar product menu like Instagram, Facebook, or TikTok stories to reduce bounce rate and improve conversion. Create custom menu items with icons, pictures, gifs, titles, and links that match the design and colors of your website. Place the menu anywhere in the store. Great for shops who want to create social media story like menu to feature products, collections, pages, and links. Circle or square thumbnail navigation menu to redirect customers from collections to specific items. Familiar product menu like Instagram, Facebook, or TikTok stories to reduce bounce rate and improve conversion. Create custom menu items with icons, pictures, gifs, titles, and links that match the design and colors of your website. Place the menu anywhere in the store. more Display menu on mobile and desktop for a seamless browsing experience Allow visitors browse faster, discover new collections, increase conversion rate Full customization of images, titles, colors, fonts, margins, locations etc. Engage visitors with a much better than conventional text-based hamburger menu Seamlessly integrate circle, square story menu bars into your Shopify 2.0 theme

5.0(Reviews)

Enhance your store with a customizable floating sidebar for promotions, discounts, and announcements Enhance your online store with a floating tab that opens a customizable sidebar. Place it on the left or right side of your website to display promotions, discounts, and announcements. Personalize text, background, and colors. The sidebar includes title, body, footer and even an image sections for detailed messaging. Fully compatible with desktop and mobile. Easy to integrate and perfect for increasing customer engagement. Enhance your online store with a floating tab that opens a customizable sidebar. Place it on the left or right side of your website to display promotions, discounts, and announcements. Personalize text, background, and colors. The sidebar includes title, body, footer and even an image sections for detailed messaging. Fully compatible with desktop and mobile. Easy to integrate and perfect for increasing customer engagement. more Customizable Floating Tab: Create an eye-catching floating tab on your site Fully Customizable Sidebar: Design your sidebar to match your brand perfectly Multi-Device Compatibility: Accessible promotions on desktop and mobile Promote discounts, updates, sales, announcements, messages, images and more Easy Integration: Integrate quickly without any coding needed

0.0(Reviews)

AI-powered personalisation, upsells, and dynamic merchandising to boost conversions. Mercury is a no-code, drag-and-drop solution for delivering personalised product recommendations, upsells, and cross-sells. It enhances every step of the shopping journey, from product discovery to the cart. With AI-driven search and dynamic merchandising, Mercury ensures your store showcases the most relevant products at the right time, boosting conversions and AOV. Integrate seamlessly with your existing stack and track real-time analytics for optimisation. Mercury is a no-code, drag-and-drop solution for delivering personalised product recommendations, upsells, and cross-sells. It enhances every step of the shopping journey, from product discovery to the cart. With AI-driven search and dynamic merchandising, Mercury ensures your store showcases the most relevant products at the right time, boosting conversions and AOV. Integrate seamlessly with your existing stack and track real-time analytics for optimisation. more AI Personalisation: Tailor product recommendations based on shopper behaviour Upsell & Cross-Sell Zones: Increase AOV with upsells from product pages to cart Dynamic Merchandising: Automatically display relevant products based on data Inline Banners: Scheduled banners (image/video) on grids & category pages AI-Powered Search: Real-time autocomplete & filters for faster product discovery

5.0(Reviews)

Showcase before-and-after product transformations with MeroxIO Slider, enhancing customer experience The MeroxIO Comparison Slider enhances Shopify stores by enabling easy visual comparisons of products. Ideal for shops with items that show clear before-and-after results, like beauty or home improvement products, it helps to enhance customer engagement and confidence. This intuitive tool allows quick integration and customization to match store aesthetics, offering a straightforward solution for impactful product display, leading to potentially higher sales and improved customer trust. The MeroxIO Comparison Slider enhances Shopify stores by enabling easy visual comparisons of products. Ideal for shops with items that show clear before-and-after results, like beauty or home improvement products, it helps to enhance customer engagement and confidence. This intuitive tool allows quick integration and customization to match store aesthetics, offering a straightforward solution for impactful product display, leading to potentially higher sales and improved customer trust. more Before-and-After Slider: Visually compare product changes. Customizable Design: Tailor to match your store's theme. Responsive Across Devices: Consistent look on all screens.

0.0(Reviews)

Compare product specifications with ease using an interactive UI for easy shopping decisions. Easily enable product comparison on your store with CompareMate. Add a "Compare" button to product pages and grids, letting customers select items for comparison. Products are shown in an interactive drawer and can be compared side-by-side on a dedicated comparison page. Customers can add products to the cart directly from the comparison page, or remove items with a single click. A bulk editor makes it easy for merchants to manage comparison data across products. Easily enable product comparison on your store with CompareMate. Add a "Compare" button to product pages and grids, letting customers select items for comparison. Products are shown in an interactive drawer and can be compared side-by-side on a dedicated comparison page. Customers can add products to the cart directly from the comparison page, or remove items with a single click. A bulk editor makes it easy for merchants to manage comparison data across products. more Add "Compare" buttons to product pages and grids. Interactive drawer shows selected items for comparison. Side-by-side product comparison on a dedicated page. Add items to the cart directly from the compare page. Bulk editor for efficient comparison data management.

0.0(Reviews)

Customize a sticky mobile menu bar to enhance your shop's navigation experience. MeroxIO Sticky Mobile Menu Bar is designed to improve your shop's mobile navigation. This app allows Shopify store owners to add a customizable sticky menu bar at the bottom of mobile screens. You can select icons and link each to different sections of your store, streamlining the user experience and potentially increasing engagement. The app's intuitive design makes it easy to integrate and customize within your store's theme, offering a seamless shopping experience for your customers. MeroxIO Sticky Mobile Menu Bar is designed to improve your shop's mobile navigation. This app allows Shopify store owners to add a customizable sticky menu bar at the bottom of mobile screens. You can select icons and link each to different sections of your store, streamlining the user experience and potentially increasing engagement. The app's intuitive design makes it easy to integrate and customize within your store's theme, offering a seamless shopping experience for your customers. more Customizable Icons: Tailor menu icons to fit your store's style. Easy Link Integration: Direct customers with clickable icons. Sticky Navigation: Constant menu access for easy usability. Mobile Optimized: Designed for an excellent mobile experience Seamless Integration: Effortlessly blends with your store theme

0.0(Reviews)

Help shoppers find products they love with beautiful dropdown menus for mobile and desktop. Put your best foot forward with beautiful and professional menu templates. Meteor uses your existing Shopify navigation settings for lightning-fast setup time. Customize the design to your liking, and preview each of your menus before you publish. Show off product images in mobile and desktop menus, and help shoppers discover great products without leaving your home page. Link any resource from Shopify: products, collections, blogs, or pages. Multi-region support for menu items and currency! Put your best foot forward with beautiful and professional menu templates. Meteor uses your existing Shopify navigation settings for lightning-fast setup time. Customize the design to your liking, and preview each of your menus before you publish. Show off product images in mobile and desktop menus, and help shoppers discover great products without leaving your home page. Link any resource from Shopify: products, collections, blogs, or pages. Multi-region support for menu items and currency! more Menus in minutes! Use your store's existing menus to streamline setup Variety of beautiful templates for both desktop and mobile Display product or collection images directly in your store's main menu Multi-region support: translated menu items and local currency Customer-friendly UX helps customers easily navigate different menu tiers

4.6(Reviews)

Progressive Announcement Banners&Bars. Microvoid: Brisk Banners Bars is the app that helps you sell, build brand image and notice important informations. You can create eye-catching and fully customizable banners&bars that will encourage customers to purchase. You can have multiple banners&bars. You can have different types of banners. Microvoid: Brisk Banners Bars is the app that helps you sell, build brand image and notice important informations. You can create eye-catching and fully customizable banners&bars that will encourage customers to purchase. You can have multiple banners&bars. You can have different types of banners. more Show your promotion with a customized banner Pause and set your banners live with 1 click Customer your Banner easily

0.0(Reviews)

高い視認性のポップアップでセット購入率アップ!サブスク商品へのアップセルも可能 【1. 絶妙なタイミングでのアップセルバナー表示】 商品ページでカートに追加する瞬間にアップセルバナーを表示します。お客様の購買意欲が高まるこのタイミングを活用します。 【2.目立つポップアップデザイン】 注目を集めるポップアップデザインを採用。視認性が高いため、アップセルの成功率向上が期待できます。CSSでのデザイン変更も可。 【3.かんたん設定】 専門知識は不要です。直感的な操作で、数回のクリックでECサイトにアップセル機能を導入できます。 【4.定期購入オファーにも対応】 単発商品だけでなく、定期購入オファーへのアップセルも可能。お客様の継続的な利用を促し、安定した収益につなげます。 【1. 絶妙なタイミングでのアップセルバナー表示】 商品ページでカートに追加する瞬間にアップセルバナーを表示します。お客様の購買意欲が高まるこのタイミングを活用します。 【2.目立つポップアップデザイン】 注目を集めるポップアップデザインを採用。視認性が高いため、アップセルの成功率向上が期待できます。CSSでのデザイン変更も可。 【3.かんたん設定】 専門知識は不要です。直感的な操作で、数回のクリックでECサイトにアップセル機能を導入できます。 【4.定期購入オファーにも対応】 単発商品だけでなく、定期購入オファーへのアップセルも可能。お客様の継続的な利用を促し、安定した収益につなげます。 more 絶妙なタイミングで表示されるポップアップの為、アップセル率向上が期待できます。 日本製アプリで唯一のサブスクリプション商品へのアップセル/クロスセスが可能。 ノーコードで簡単設定 あんしんの日本語対応!導入前の検討段階から、導入後も使い方やカスタマイズのご相談など、メールやで丁寧にサポート。

5.0(Reviews)

Add free shipping bar to the store. Set country specific free shipping messages for global customer Geo Shipping Bar adds a free shipping bar to your website. You can set country or continent specific messages to target international customers. You can customize the look and feel of the free shipping bar to match your theme. Welcome customers from different countries warmly to your international business by showing localized free shipping messages. You can configure different messages for the shipping progress bar state. Preview the free shipping bar message before making it live. Geo Shipping Bar adds a free shipping bar to your website. You can set country or continent specific messages to target international customers. You can customize the look and feel of the free shipping bar to match your theme. Welcome customers from different countries warmly to your international business by showing localized free shipping messages. You can configure different messages for the shipping progress bar state. Preview the free shipping bar message before making it live. more Customize the shipping bar using background color, font and timer Set different messages for customers coming from different countries/ continents Works with the multi country shipping limits set in your admin settings

5.0(Reviews)

Easily create Lookbooks with product rollovers and links directly to your products to purchase The Lookbook App • Easy setup with multiple themes to display • Link to purchase products • Customise your markers that display and connect your products (on mouse over or touch). • Customise display info for each product (Title, Price, Image). • Link markers to any product or URL. • Simple drag and drop interface to order the pages in each Lookbook. • Select any image assigned to a product as the rollover image for your marker. The Lookbook App • Easy setup with multiple themes to display • Link to purchase products • Customise your markers that display and connect your products (on mouse over or touch). • Customise display info for each product (Title, Price, Image). • Link markers to any product or URL. • Simple drag and drop interface to order the pages in each Lookbook. • Select any image assigned to a product as the rollover image for your marker. more Easily create Lookbooks with product rollovers to purchase Responsive for all devices with multiple themes. Create unlimited Lookbooks with no coding required.

4.1(Reviews)

Unified free gift with purchase + BOGO + upsell/cross sell app to enhance AOV and conversion rates The has a simple goal: to help your store drive incremental sales & conversions with a measurable ROI. Use the app to show all kinds of offers, discounts, recommendations & nudges across the buying journey right from the product pages to the cart to checkout to post checkout. Customize the design & experience of the app's widgets (+translate text) exactly as you want & use our robust eligibility system to create personalized buyer experiences. The has a simple goal: to help your store drive incremental sales & conversions with a measurable ROI. Use the app to show all kinds of offers, discounts, recommendations & nudges across the buying journey right from the product pages to the cart to checkout to post checkout. Customize the design & experience of the app's widgets (+translate text) exactly as you want & use our robust eligibility system to create personalized buyer experiences. more Improve cart’s conversion by combining cart upsells with a tiered progress bar Offer BOGO, free gift with purchase of specific products, cart values etc Setup upsells, cross sells & quantity discounts across the entire buying journey Customize the design & user experience of widgets/popups exactly as you want Show upsell, tiered rewards & free gift with purchase at checkout (Shopify Plus)

4.9(Reviews)

Shoppable Instagram & TikTok feeds. Build social proof with UGC, Reels, Stories, videos& drive sales MP Instagram Feed turns your Instagram & TikTok content into sales with shoppable social feeds. Showcase UGC, Reels & Stories in stunning layouts (grid, slider, highlight, coverflow, masonry) that build trust and boost conversions. Auto-sync content from multiple accounts, tag products for instant shopping, and track performance with built-in analytics. Mobile-optimized galleries deliver a seamless shopping experience that turns browsers into buyers. MP Instagram Feed turns your Instagram & TikTok content into sales with shoppable social feeds. Showcase UGC, Reels & Stories in stunning layouts (grid, slider, highlight, coverflow, masonry) that build trust and boost conversions. Auto-sync content from multiple accounts, tag products for instant shopping, and track performance with built-in analytics. Mobile-optimized galleries deliver a seamless shopping experience that turns browsers into buyers. more Shoppable social feeds – Convert Instagram & TikTok content into sales Instant product tagging – Let shoppers buy directly from posts & videos Auto-sync content – Keep feeds fresh with automatic updates UGC & multi-account support – Showcase real customer posts and tagged content Custom layouts & analytics – Match your store design and track performance

4.9(Reviews)

Reduce returns & boost sales with customizable size charts & smart size recommendations Sizing issues can lead to lost sales and high return rates. When customers are unsure of their size, they may abandon their cart or purchase the wrong fit, resulting in returns and dissatisfaction. MP Size Chart & Size Guide solves this with clear, customizable charts, auto unit conversion, fast-loading performance, an exclusive size chart reminder and smart size recommendations that deliver personalized fit suggestions. Enhance the shopping experience, build customer trust and drive more sales. Sizing issues can lead to lost sales and high return rates. When customers are unsure of their size, they may abandon their cart or purchase the wrong fit, resulting in returns and dissatisfaction. MP Size Chart & Size Guide solves this with clear, customizable charts, auto unit conversion, fast-loading performance, an exclusive size chart reminder and smart size recommendations that deliver personalized fit suggestions. Enhance the shopping experience, build customer trust and drive more sales. more 23+ ready templates – Launch charts in minutes, no coding required Fully customizable design – Adjust colors, fonts, layouts & media easily Size recommendation – Reduce returns with personalized fit suggestions Bulk import & auto unit conversion – Upload hundreds fast, ready for global fit Assign charts flexibly – All products or groups by vendor, tag, type, collection

4.9(Reviews)

Add multiple product options with price addons & conditional logic with zero knowledge of coding. Most e-commerce products require data input from the customer before they make their purchase. These data inputs may be anything from shoe sizes to shirt colors. Certain customizable products also need extra information from the customer, like a name or logo to print. This app allows you to add unlimited options to your Shopify store. You can then see the collected data in the order in admin! Field types include: Short text box, Long text box, Radio buttons, Dropdown, Image upload & Datepicker. Most e-commerce products require data input from the customer before they make their purchase. These data inputs may be anything from shoe sizes to shirt colors. Certain customizable products also need extra information from the customer, like a name or logo to print. This app allows you to add unlimited options to your Shopify store. You can then see the collected data in the order in admin! Field types include: Short text box, Long text box, Radio buttons, Dropdown, Image upload & Datepicker. more Create the fields based on tag, vendor, type, URL, and handle. Create different fields for different products based on your choice. Field type: Short & Long text, Radio button, Dropdown, Image, Datepicker, etc. Price add-ons feature available for per field/option Set the class name, placeholder and default value without any hassle.

4.9(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.