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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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Display your Instagram Reels, feeds, shoppable videos & UGC as a gallery on your store Mintt Instafeed lets you display Instagram feeds, Reels, shoppable videos, and UGC as galleries. Create product and collection feeds that build social proof and drive sales. Automatically sync your Instagram feeds, auto-tag products, and let customers shop now or add to cart directly from posts. Customize grid or slider layouts, pin or hide Instagram content, and upload your own photos and videos. Fast, responsive, and built to convert. Upload videos to the Shop app to reach new shoppers. Mintt Instafeed lets you display Instagram feeds, Reels, shoppable videos, and UGC as galleries. Create product and collection feeds that build social proof and drive sales. Automatically sync your Instagram feeds, auto-tag products, and let customers shop now or add to cart directly from posts. Customize grid or slider layouts, pin or hide Instagram content, and upload your own photos and videos. Fast, responsive, and built to convert. Upload videos to the Shop app to reach new shoppers. more Display Instagram Reels, posts, videos & UGC in auto-syncing feeds Create shoppable feeds with product & collection tagging Auto-tag products and enable shop now or add to cart from Instagram posts Grid or slider layouts optimized for all devices Upload, pin, hide & reorder posts for full feed control

4.9(Reviews)

Instafeed - Instagram Feed, Instagram Story, Instagram Highlights, Instagram Reels Instafeed – The ultimate Instagram app for your store. Simple Instagram integration. Seamlessly connect your Instagram account to automatically update your store with your latest posts, stories, reels and highlights. With this Instafeed, showcase your Instagram feed in a beautiful carousel/slider on your website, effortlessly integrate stories and display highlights in a stunning slider anywhere in your store. Instantly transform your store and automatically drive fresh new content. Instafeed – The ultimate Instagram app for your store. Simple Instagram integration. Seamlessly connect your Instagram account to automatically update your store with your latest posts, stories, reels and highlights. With this Instafeed, showcase your Instagram feed in a beautiful carousel/slider on your website, effortlessly integrate stories and display highlights in a stunning slider anywhere in your store. Instantly transform your store and automatically drive fresh new content. more Instagram Feed - Display a simple but beautiful feed of your latest posts Instagram Story & Highlights - Bring those Instagram circles to your store Instagram Reels - Embed your latest reels instantly Mobile Optimised - Automatically resizes to work on all display sizes No Coding Required - Instantly add your Instagram feed within seconds

5.0(Reviews)

Create a Sticky Add To Cart button to make it easier to buy in your store, and support mobile. Instant Buy allows you to create a button to redirect store visitors to relevant pages like product pages, discount events, and back-in-stock announcements. Shoppers can easily and quickly add products to their cart instantly and be directed to the checkout page with one click checkout. Instant Buy allows you to add your Facebook Pixel ID and Pinterest Tag ID to the Add To Cart button. Statistics and counting the number of impressions and clicks on the Sticky Add To Cart button Instant Buy allows you to create a button to redirect store visitors to relevant pages like product pages, discount events, and back-in-stock announcements. Shoppers can easily and quickly add products to their cart instantly and be directed to the checkout page with one click checkout. Instant Buy allows you to add your Facebook Pixel ID and Pinterest Tag ID to the Add To Cart button. Statistics and counting the number of impressions and clicks on the Sticky Add To Cart button more Create a Sticky Add To Cart button to make it easier to buy in your store Recover abandoned carts with Facebook and Pinterest Remarketing Statistics and counting the number of impressions and clicks on the Ajax Button Customize the button's text, font size, and color to match with the main theme. Optimize execution speed and do not affect website speed

4.5(Reviews)

The Quick View feature on the collection page that displays the details of the product in a popup Instant View app allows you to enable a feature on the collection page that helps your customers to see the product information in an intuitive way. The Quick View feature plays an important role in creating more conversions from online stores. This saves your customers time and provides a faster browsing experience. Instant View app allows buyers to view product details quickly without navigating to the product page. Instant View app allows you to enable a feature on the collection page that helps your customers to see the product information in an intuitive way. The Quick View feature plays an important role in creating more conversions from online stores. This saves your customers time and provides a faster browsing experience. Instant View app allows buyers to view product details quickly without navigating to the product page. more Highly adaptable view for all desktop screen resolutions and iPad Truly compatible with most of Shopify themes Social Media share One-click Checkout Color Swatch Option

5.0(Reviews)

Dynamic Store Enhancement: Embed Real-Time Instagram Feeds with Instasync With Instasync, effortlessly integrate elegant Instagram feeds into your Shopify store in under a minute. Showcasing Instagram content, such as photos and Reels, on your store enhances social proof, transforming visitors into loyal customers and attracting new Instagram followers. Enjoy a one-click setup that’s compatible with all themes, and customize your feed design to perfectly match your brand. Experience the seamless integration and customization of Instasync—it's like magic! With Instasync, effortlessly integrate elegant Instagram feeds into your Shopify store in under a minute. Showcasing Instagram content, such as photos and Reels, on your store enhances social proof, transforming visitors into loyal customers and attracting new Instagram followers. Enjoy a one-click setup that’s compatible with all themes, and customize your feed design to perfectly match your brand. Experience the seamless integration and customization of Instasync—it's like magic! more Easy Integration: Sync your Instagram feed effortlessly with just a few clicks Product Driven Posts: Tag products in posts to display on related product pages Content Moderation: Hide posts and customize layouts with custom CSS Customizable Layouts: Use grid/slider, adjust rows, columns, posts in all themes Responsive Design: Optimized for both desktop and mobile users

5.0(Reviews)

Build custom contact forms and send submissions to CRMs, email, APIs, and tools Contact Form to Any API is a powerful Shopify form builder for merchants, agencies, and developers. Build unlimited custom forms using a visual editor, collect unlimited submissions, and control how your data flows. Start with simple contact forms and scale into structured workflows using APIs and integrations like HubSpot, Mailchimp, Klaviyo, Slack, or Zapier. No coding required. Free plan available with no limits on forms or submissions. Contact Form to Any API is a powerful Shopify form builder for merchants, agencies, and developers. Build unlimited custom forms using a visual editor, collect unlimited submissions, and control how your data flows. Start with simple contact forms and scale into structured workflows using APIs and integrations like HubSpot, Mailchimp, Klaviyo, Slack, or Zapier. No coding required. Free plan available with no limits on forms or submissions. more Build unlimited Shopify forms with no submission limits Drag-and-drop form builder that works with all Shopify themes Send form data to email, APIs, CRMs, or automation tools Start free and upgrade only when automation is needed Designed for merchants, agencies, and developers alike

4.1(Reviews)

Create color or image swatches for your products The purpose of the app is to convert your product variant options (typically dropdowns) into color swatches, image swatches, or text swatches. Create swatches for all products in bulk, or for specific products only. Customize the design of your swatches, the shape and size. The purpose of the app is to convert your product variant options (typically dropdowns) into color swatches, image swatches, or text swatches. Create swatches for all products in bulk, or for specific products only. Customize the design of your swatches, the shape and size. more Swatch types: Text swatches, Color swatches, Multicolor swatches, Image swatches Create swatches globally for all products, or for specific product individually Various swatch shapes and sizes, fully customizable design of swatches

5.0(Reviews)

Add a free shipping progress bar to motivate your customers to buy more and boost AOV! A Free Shipping Bar motivates customers to buy more to unlock free shipping. This intuitive free shipping progress bar takes only one minute to set up. Enhance customer engagement by displaying their progress towards the free shipping goal as they add items to their cart. Inspire shoppers to finalize their purchases by reaching the predetermined cart value, seamlessly integrating motivation with convenience. A Free Shipping Bar motivates customers to buy more to unlock free shipping. This intuitive free shipping progress bar takes only one minute to set up. Enhance customer engagement by displaying their progress towards the free shipping goal as they add items to their cart. Inspire shoppers to finalize their purchases by reaching the predetermined cart value, seamlessly integrating motivation with convenience. more Display a free shipping offer with progressive shipping goal to boost AOV Customize text, cart goals, and colors Simple, easy to use app with no coding required

1.0(Reviews)

A simple map section for your store. Display your locations by entering their names and addresses. IzyMaps makes it easy to add one or more store locations to your store. Customize the layout, highlight multiple locations, and even show the nearest one to your customer automatically. With flexible styling options and a clean design, it’s perfect if you're seeking a straightforward, elegant solution. IzyMaps makes it easy to add one or more store locations to your store. Customize the layout, highlight multiple locations, and even show the nearest one to your customer automatically. With flexible styling options and a clean design, it’s perfect if you're seeking a straightforward, elegant solution. more Add a Google Map with one or multiple store locations Auto-locate and show the nearest store based on customer location Let customers search by name, city, or address to find the right store Customize layout, colors, and content to match your store’s look

5.0(Reviews)

IzyRent is a complete and easy-to-use app for rentals, bookings, events, services & appointments Essential for every bookings, rentals, events, services, & appointments business. One click and you can now take hotel bookings, rent equipment & clothings, sell courses & a lot more. You dont have to set each availability date. It's fully dynamic. You can track all your current bookings directly from the app or on your favorite calendar! Speed and ergonomy is important, that's why IzyRent use a fast and lightweight calendar for best performance & user-experience. Essential for every bookings, rentals, events, services, & appointments business. One click and you can now take hotel bookings, rent equipment & clothings, sell courses & a lot more. You dont have to set each availability date. It's fully dynamic. You can track all your current bookings directly from the app or on your favorite calendar! Speed and ergonomy is important, that's why IzyRent use a fast and lightweight calendar for best performance & user-experience. more Auto-Block of Dates, Manual Bookings & Reminders. Discount Price & Special Rates based on any dates you want. Deposit Option & Pay Later for caution and partial online payment. Add products Add-ons and ask informations from customer with booking notes. Synchronize with Google, iCloud, Outlook, AirBNB & every iCalendar solution!

4.9(Reviews)

Add size guide & size charts that matches your brand, lightweight, fast, won’t slow down your store Getting returns because customers pick the wrong size? Our size chart app helps fix that. Create clear, fast-loading size charts and size guides with auto unit conversion, prebuilt templates, and fully flexible layouts. Show measurements with images, tables, or text, and customise every detail with plenty of settings. Translate your size guides for global shoppers, flexible size chart button placement options, and rely on our personalised support. We’ve got everything you need, try it out Getting returns because customers pick the wrong size? Our size chart app helps fix that. Create clear, fast-loading size charts and size guides with auto unit conversion, prebuilt templates, and fully flexible layouts. Show measurements with images, tables, or text, and customise every detail with plenty of settings. Translate your size guides for global shoppers, flexible size chart button placement options, and rely on our personalised support. We’ve got everything you need, try it out more Add tabs, images tables to size chart & create flexible size guide, size charts Assign size charts & size guide to specific products, collections, tags & vendor Flexible size chart & guide button placement option + custom button positioning Mobile & desktop responsive size chart, sizing guide & size charts Multi-language Support – Make sizing guides, size charts & size chart global

5.0(Reviews)

Refresh your buyer’s memory and boost sales by Recently Viewed Products in your store. Generate more revenue | Soft-sell products | Simplify the checkout process. Customers may want to pick up their shopping journey from where they have last left off. The Recently Viewed Products feature offers them an overview of the items they may have explored of late. It serves as a reminder for recently viewed items that once held their interest and encourages them to complete the purchase. We also offer homepage customization to display Recently Viewed Products on the home screen. Generate more revenue | Soft-sell products | Simplify the checkout process. Customers may want to pick up their shopping journey from where they have last left off. The Recently Viewed Products feature offers them an overview of the items they may have explored of late. It serves as a reminder for recently viewed items that once held their interest and encourages them to complete the purchase. We also offer homepage customization to display Recently Viewed Products on the home screen. more Multiple Language Translation Support Mobile-friendly display without losing out on features and functionalities. Customize the “Buy Now/Add to Cart” button to maintain brand consistency. Customize recently viewed products with border and background color and display. Enable or disable the recently viewed product slider and auto slider feature.

4.6(Reviews)

Increase sales and AOV with combo products, kits, bundle box sets, and mix & match offers. Encourage customers to spend more by offering product bundles at a discounted price (fixed discount or percentage discount), clear excess stock by bundling slow-moving items with bestsellers, and run seasonal promotions like holiday gift sets. Upsell complementary products in a single bundle, or simplify gifting with ready-made boxes. Use bundle maker to create flexible bundle pages for every sales strategy and increase profits. Install fast – go live today – start selling bundles in minutes! Encourage customers to spend more by offering product bundles at a discounted price (fixed discount or percentage discount), clear excess stock by bundling slow-moving items with bestsellers, and run seasonal promotions like holiday gift sets. Upsell complementary products in a single bundle, or simplify gifting with ready-made boxes. Use bundle maker to create flexible bundle pages for every sales strategy and increase profits. Install fast – go live today – start selling bundles in minutes! more Mix & Match: Let customers create personalized bundle sets with bundle builder. Build-a-Box / Boxbuilder: Shoppers pick products to fill their own box. Bundle Page: Dedicated bundle landing to boost AOV. Combo Bundle / Flexible Variants: Offer combos with multiple product options. Use Bundles app for Bundle Kits, Gift Sets, Meal Packs, Outfit Builders & More.

4.8(Reviews)

Create stunning banners in minutes. Engage shoppers & boost sales - no coding needed. Show banners that build trust and drive more sales. Present promotions, spotlight new arrivals or events, and announce sales with elegant, mobile-friendly designs. Announcement Banner by Kaktus boosts engagement with eye-catching banners that match your brand. Customize layouts, colors, and speed easily - no coding needed. Install in minutes and track clicks and views with built-in analytics. Perfect for keeping shoppers informed and turning visits into purchases. Show banners that build trust and drive more sales. Present promotions, spotlight new arrivals or events, and announce sales with elegant, mobile-friendly designs. Announcement Banner by Kaktus boosts engagement with eye-catching banners that match your brand. Customize layouts, colors, and speed easily - no coding needed. Install in minutes and track clicks and views with built-in analytics. Perfect for keeping shoppers informed and turning visits into purchases. more Build image banners, add social media buttons and discounts with ease. Choose pre-made templates or customize layouts to match your style. Embed banners anywhere or show as floating pop-ups to boost visibility. Track clicks & views with built-in analytics tools to optimize your strategy. Mobile-friendly designs match your brand on all devices.

0.0(Reviews)

Flexible custom contact forms with file upload to handle inquiries and boost lead generation. Effortlessly connect with your customers to generate more leads and product sales with Contact Form Builder. Easy to build Popup Contact Form, Page Embedded Forms, Signup Form, Multi Step Forms & Floating Bubble Forms. Select the fields, add contact form file upload, ensuring you gather all the information in register form or data collection form. Our user-friendly Contact Form app effortlessly integrates with your email providers, such as Mailchimp, Mailerlite, and Getresponse. Effortlessly connect with your customers to generate more leads and product sales with Contact Form Builder. Easy to build Popup Contact Form, Page Embedded Forms, Signup Form, Multi Step Forms & Floating Bubble Forms. Select the fields, add contact form file upload, ensuring you gather all the information in register form or data collection form. Our user-friendly Contact Form app effortlessly integrates with your email providers, such as Mailchimp, Mailerlite, and Getresponse. more Effortlessly create contact forms and collect data from your customers. Customize formulaire contact& formulieren to suit your website style. Trigger your signup form, formulario de contacto anywhere. Drag&drop form builder with file upload and AI generation to save your time. Easy contact forms&lead generation form with integrations to make automation.

4.9(Reviews)

Simplify feedback collection, get customer reviews with fun, mobile-friendly emoji forms. The Emoji Request Feedback and Reviews app offers a fun and engaging way to collect customer feedback. Store owners can effortlessly create custom feedback forms using emojis, stars, or hearts, allowing customers to express their opinions quickly and visually. Customizable to fit your store’s brand, the app enables you to gather valuable insights and boost customer satisfaction without any coding required. It’s fully mobile-optimized, ensuring that customers can provide feedback from any device. The Emoji Request Feedback and Reviews app offers a fun and engaging way to collect customer feedback. Store owners can effortlessly create custom feedback forms using emojis, stars, or hearts, allowing customers to express their opinions quickly and visually. Customizable to fit your store’s brand, the app enables you to gather valuable insights and boost customer satisfaction without any coding required. It’s fully mobile-optimized, ensuring that customers can provide feedback from any device. more Customizable emoji feedback forms that match your store’s branding. Simple setup and management of emoji benefits feedback forms. Pre-made templates for quick and easy rating and review form creation. Fully mobile-optimized for a smooth сustomer кeviews & щpinions experience. Let visitors share feedback with emoji requests & submit custom reviews easily.

0.0(Reviews)

Boost AOV with an announcement bar for free delivery with animated shipping bar and goal messages. Motivate shoppers and boost sales with a customizable free shiping bar. Display real-time cart goal progress, create urgency with countdown timers, or spotlight limited-time offers. Choose from top bar, bottom bar, or embed on product pages. Tailor the free shipping cart bar to match your brand’s style. Set up in 2 minutes ultimate free shipping bar - without coding. Whether it’s a free shipping progress bar, flash sale, or product launch timer - capture attention and drive more conversions. Motivate shoppers and boost sales with a customizable free shiping bar. Display real-time cart goal progress, create urgency with countdown timers, or spotlight limited-time offers. Choose from top bar, bottom bar, or embed on product pages. Tailor the free shipping cart bar to match your brand’s style. Set up in 2 minutes ultimate free shipping bar - without coding. Whether it’s a free shipping progress bar, flash sale, or product launch timer - capture attention and drive more conversions. more Use as announcement bar, promo bar, free delivery bar or free shipping widget. Utilize a countdown bar and sales timer for special events to boost sales. Display shipping goal as a header bar, bottom bar or embed on product pages. Free shipping progress bar for real-time goal tracking. Fully responsive on desktop, tablet, and mobile devices.

4.5(Reviews)

GDPR banner to protect privacy, safeguard store & build trust - collect cookie consent in seconds. Create customizable cookie banners, consent bars, and popups to protect user privacy and meet regulations worldwide. Stay GDPR, CCPA, and ePrivacy compliant with tiny cookie widget. Easily match your store’s branding, choose from pre-made templates, and display on any device. Display GDPR legal cookie on all or specific pages. Target customers from different locations like EU, UK, or California - protect your business, build trust, and avoid costly fines with fast, effortless setup. Create customizable cookie banners, consent bars, and popups to protect user privacy and meet regulations worldwide. Stay GDPR, CCPA, and ePrivacy compliant with tiny cookie widget. Easily match your store’s branding, choose from pre-made templates, and display on any device. Display GDPR legal cookie on all or specific pages. Target customers from different locations like EU, UK, or California - protect your business, build trust, and avoid costly fines with fast, effortless setup. more Pre-built cookies popup templates for quick cookie policy setup. Match privacy popup design to your store’s branding & colors. Fully responsive customer privacy banner for desktop & mobile. Display consent cookies banners on all or selected store pages. Install GPDR & go live in minutes, without any technical skills.

0.0(Reviews)

Present your work professionally with a responsive and customizable portfolio photo gallery. Create your perfect portfolio with our easy-to-use photo gallery app. Whether you're building an illustrator portfolio, showcasing a project portfolio, or curating an art portfolio, this is your all-in-one solution. Enjoy an easy portfolio experience with customizable layouts and stunning visuals. From portfolio sammlung to modern galeria styles, our gallery tools make presenting your work effortless and beautiful. Create your perfect portfolio with our easy-to-use photo gallery app. Whether you're building an illustrator portfolio, showcasing a project portfolio, or curating an art portfolio, this is your all-in-one solution. Enjoy an easy portfolio experience with customizable layouts and stunning visuals. From portfolio sammlung to modern galeria styles, our gallery tools make presenting your work effortless and beautiful. more Choose from grid gallery, collage, or list views to showcase your work. Display projects with engaging effects, adding descriptions and links. Customize colors, fonts, CTA buttons, and author details to match your style. Allow visitors to filter galerie projects by category for easy navigation. As zify photo gallery & portfolio, portfolio gallery by powr, elfsight portfolio

4.9(Reviews)

Help customers easily find their true size with detailed size charts and reduce return rate. Size Guides & Size Chart app help your customers to say goodbye to sizing frustrations. Create custom size charts with ease using size selector and AI generator. Designed for shop owners, our app lets you build accurate, true-to-size charts, size finders, size recommendation and fit guides to enhance your customers' shopping experience. Perfect for clothes size chart, shoes size or accessories. Increase your confidence, increase your profits and make sure that size matters! Size Guides & Size Chart app help your customers to say goodbye to sizing frustrations. Create custom size charts with ease using size selector and AI generator. Designed for shop owners, our app lets you build accurate, true-to-size charts, size finders, size recommendation and fit guides to enhance your customers' shopping experience. Perfect for clothes size chart, shoes size or accessories. Increase your confidence, increase your profits and make sure that size matters! more Easily create sized size charts comparison table tailored to your products. Visually showcase true size options in size table for your customers. Add detailed measurement guides to assist customers in finding the right size. Simple, intuitive sizing chart design makes it easy to find the information. Size matters & fit guide widget that works seamlessly on all devices.

5.0(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.