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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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Make free shipping irresistible! Motivate customers to spend more with a real-time progress bar. Imagine turning hesitant browsers into buyers—effortlessly. With GP Free Shipping Bar, you can display real-time cart progress that nudges customers to spend more and unlock free shipping. Fully customizable and mobile-friendly, this app targets specific pages, devices, and regions, delivering personalized shopping experiences. Whether you’re a small startup or a scaling store, this “set-it-and-forget-it” tool drives conversions and maximizes revenue. Don’t leave money in the cart—start today! Imagine turning hesitant browsers into buyers—effortlessly. With GP Free Shipping Bar, you can display real-time cart progress that nudges customers to spend more and unlock free shipping. Fully customizable and mobile-friendly, this app targets specific pages, devices, and regions, delivering personalized shopping experiences. Whether you’re a small startup or a scaling store, this “set-it-and-forget-it” tool drives conversions and maximizes revenue. Don’t leave money in the cart—start today! more Dynamic Progress Bar Track real-time cart value with automatic progress updates Extensive Customization Options Easily adjust colors, fonts, and banner position Geographic and Device Targeting Apply country-specific shipping rules and target Targeted Page Display Show the free shipping bar only on specific pages to enhan Language Localization Offer your free shipping bar in multiple languages.

4.2(Reviews)

Organize similar products in ‘groups’ and display them like variants on your product pages. Do you need dedicated product pages for your variants? Want your customers to switch between them easily? groupmate can help with that. We simplify the management of your product groups and seamlessly integrate them into your theme. Without affecting your page speed. Bonus: groupmate comes with an additional 'barebone' version, so that your dev team can truly customize the swatches to your needs and style guide, or build new functionalities on top of it. Do you need dedicated product pages for your variants? Want your customers to switch between them easily? groupmate can help with that. We simplify the management of your product groups and seamlessly integrate them into your theme. Without affecting your page speed. Bonus: groupmate comes with an additional 'barebone' version, so that your dev team can truly customize the swatches to your needs and style guide, or build new functionalities on top of it. more Like the "Shopify Combined Listings" App, already available for everyone Comes with different swatch styles (color, button and image) Simple, non-intrusive integration in your Online Store 2.0 theme Doesn't affect your page speed

5.0(Reviews)

Stop giving discounts to everyone. Target window shoppers with time-limited discount offers. Growth Suite analyzes visitor behavior and makes time limited product discount offers. Adds a native discount countdown timer to every page to create authentic urgency. Seamless integration places product discount timers on product pages, and the cart page, creating a true authentic urgency. Each visitor receives a unique discount code; discount code is automatically applied in cart. When the countdown ends, the code—and any discount in cart—is removed. No coding or theme edits required. Growth Suite analyzes visitor behavior and makes time limited product discount offers. Adds a native discount countdown timer to every page to create authentic urgency. Seamless integration places product discount timers on product pages, and the cart page, creating a true authentic urgency. Each visitor receives a unique discount code; discount code is automatically applied in cart. When the countdown ends, the code—and any discount in cart—is removed. No coding or theme edits required. more Offer discounts only to visitors who need a nudge. Auto-Applied Unique Codes: Real, one-time use codes that truly expire. Discount A/B Testing: Test different discount rates and offer durations. No-Code Setup & Customization: Install in minutes and match your brand design. Protect Your Margins: Exclude any product or collection from offers.

4.9(Reviews)

Build social proof with customer photos and Instagram posts, and make any photo shoppable. Your happy customers are your best sales tool. Collect photos from buyers with a description and their email, approve what fits your brand, and show them in galleries on product pages or anywhere else. Bring your Instagram content to the same pages: connect an account and display posts, Reels, and carousels in a widget that stays in sync. Link products to any photo or post, so buyers reach the product page in one click. Editable Alt text keeps visuals readable for search engines. Your happy customers are your best sales tool. Collect photos from buyers with a description and their email, approve what fits your brand, and show them in galleries on product pages or anywhere else. Bring your Instagram content to the same pages: connect an account and display posts, Reels, and carousels in a widget that stays in sync. Link products to any photo or post, so buyers reach the product page in one click. Editable Alt text keeps visuals readable for search engines. more Masonry, Slider, and Grid UGC galleries on the product or any store page. Instagram posts, Reels, and carousels in a widget that syncs automatically. Link up to 4 products to any photo or Instagram post to make it shoppable. Upload form for buyers, with approve and reject moderation in the admin. Editable Alt-text for better SEO and client info collection for further contact.

5.0(Reviews)

Send a birthday email with a discount to build loyalty and repeat purchases Happy Birthday Email lets you celebrate every customer’s birthday with a personalised email and birthday discount. Collect birth dates online or in-store, then send automated birthday emails that drive sales and boost loyalty. Use it as a simple birthday loyalty program or connect it with your email platform. You’ll build stronger relationships and gain insight into customer age and anniversaries too. Happy Birthday Email lets you celebrate every customer’s birthday with a personalised email and birthday discount. Collect birth dates online or in-store, then send automated birthday emails that drive sales and boost loyalty. Use it as a simple birthday loyalty program or connect it with your email platform. You’ll build stronger relationships and gain insight into customer age and anniversaries too. more Send birthday emails with personalised messages and discounts Run a birthday loyalty campaign with zero ongoing effort Collect birthdays and age data at checkout, POS, or landing pages Works with your email platform or sends happy birthday emails for you Populates Shopify’s customer birthday metafield

5.0(Reviews)

Quantity breaks, BOGO, bundles, mix and match and a free gift with purchase, in your theme's look. Happy Bundle adds quantity breaks, BOGO, bundles, mix and match, a free gift with purchase, add-ons and frequently bought together to your product pages. Create tiered pricing like Buy 2, save 10% and Buy 3, save 15%, buy one get one free or buy 2 get 1 free. The price on the page is the price at checkout, and it works with your discount codes. Offers use your theme's fonts and colors in 136 storefront languages, with A/B tests and analytics. Stuck? Chat with real people in the app. Happy Bundle adds quantity breaks, BOGO, bundles, mix and match, a free gift with purchase, add-ons and frequently bought together to your product pages. Create tiered pricing like Buy 2, save 10% and Buy 3, save 15%, buy one get one free or buy 2 get 1 free. The price on the page is the price at checkout, and it works with your discount codes. Offers use your theme's fonts and colors in 136 storefront languages, with A/B tests and analytics. Stuck? Chat with real people in the app. more Shoppers pick a size and color for each item in a quantity break Works with your discount codes and free shipping codes A sticky add to cart bar that keeps the chosen offer and its price in view A free gift with purchase added at a cart amount you set, with a spend more line Moving from another bundle app? Your offers are copied in as drafts

5.0(Reviews)

All in one top bar. Free shipping progress, auto discount, email, countdown, multiple banners. NEW: show free shipping progress in a pop up thermometer! No need to install multiple apps for Free Shipping Bar, Automatic Discount, Coupon, Email, Announcements, or Countdown. Headband includes all these banners in one app, so you can manage all your banners in one place, and have them work seamlessly together. Use multiple banners, stacked or in a slider. Easily customize your banners to match your store's appearance. No changes are made to your theme. No coding is needed. NEW: show free shipping progress in a pop up thermometer! No need to install multiple apps for Free Shipping Bar, Automatic Discount, Coupon, Email, Announcements, or Countdown. Headband includes all these banners in one app, so you can manage all your banners in one place, and have them work seamlessly together. Use multiple banners, stacked or in a slider. Easily customize your banners to match your store's appearance. No changes are made to your theme. No coding is needed. more Free shipping progress bar or thermometer shoppers spend more & convert sooner. Countdown, discount banner, email popup, and linkable announcement for any need. No code necessary. Easily customized look and feel to match your store.

5.0(Reviews)

Create customer sign-up forms as unique as your business, and save custom data to customer accounts. Helium Customer Fields is your one-stop shop to collect and manage customer data. Create unique registration forms for different customer groups, and collect first-party data from customers such as birthday, pet's name, VAT/Tax ID, etc. All customer data is synced with Shopify fields and customer metafields. Personalize forms with rules and variables, or add customer tags automatically based on first-party data. Use our integrations to sync customer data with your business/marketing tools. Helium Customer Fields is your one-stop shop to collect and manage customer data. Create unique registration forms for different customer groups, and collect first-party data from customers such as birthday, pet's name, VAT/Tax ID, etc. All customer data is synced with Shopify fields and customer metafields. Personalize forms with rules and variables, or add customer tags automatically based on first-party data. Use our integrations to sync customer data with your business/marketing tools. more Simple drag-and-drop form builder with field types for nearly any use case Approve Wholesale/B2B customers with account approval or email verification Allow customers to edit their own data (name, email, or custom fields) Configure automatic and/or conditional customer tags to organize customer groups Developer-friendly! Front-end and back-end APIs are available for custom builds

4.5(Reviews)

Welcome your customers & Boost your sales Welcome your customers on your store and show them announcements, offers, deals and increase your sales. The Hello Announcements App is easy to use and doesn't require any form of coding skills. The app automatically gets installed on your store and if you ever decide to uninstall it, no residue code will be left. The app allows you to easily announce sales, deals and even discount codes. With it many options, you can fully customize the bars including colors, text and even integrate links. Welcome your customers on your store and show them announcements, offers, deals and increase your sales. The Hello Announcements App is easy to use and doesn't require any form of coding skills. The app automatically gets installed on your store and if you ever decide to uninstall it, no residue code will be left. The app allows you to easily announce sales, deals and even discount codes. With it many options, you can fully customize the bars including colors, text and even integrate links. more Welcome your customers and Give them offers = More sales! Customize the announcement bar colors, button label and target countries. Easy to use but has powerful options.

5.0(Reviews)

Demand Capture Elevated: popup and form builder for abandoned carts, emails, A/B, upsells, etc. Turn visitors into leads, subscribers and customers. Easy to use pop ups and forms created for function, used by merchants and Agencies for well over a decade. Beautiful templates and an easy to use builder makes it a breeze to create beautiful and engaging popups without a designer. Get access to over 300 templates designed to help capture email addresses, recover abandoned carts, get customer feedback, upsell customers, make announcements and more. Turn visitors into leads, subscribers and customers. Easy to use pop ups and forms created for function, used by merchants and Agencies for well over a decade. Beautiful templates and an easy to use builder makes it a breeze to create beautiful and engaging popups without a designer. Get access to over 300 templates designed to help capture email addresses, recover abandoned carts, get customer feedback, upsell customers, make announcements and more. more Capture email addresses & recover abandoned carts. Announce sales and drive traffic to specific pages. Intentional targeting of pages, geo, site location and/or user behavior. 100s of templates, make it easy to design effective pop ups & announcement bars. Native integrations w/ email & CRM providers including Klaviyo, HubSpot, & more

0.0(Reviews)

Easily create FAQ page for your store or products to reduce your customer service time & usefulness. Easy FAQ revolutionizes your store's FAQs! Designed with users in mind, it effortlessly crafts stylish product Q&A and seamlessly integrates with your theme for maximum impact! Elevate your brand with full customization—tweak fonts, colors, and styles to match your unique flair. Plus, experience lightning-fast page loads, ensuring your customers get the answers they need in a blink. Reduce customer support requests with questions and answers! App also easily integrated with Shop app! Easy FAQ revolutionizes your store's FAQs! Designed with users in mind, it effortlessly crafts stylish product Q&A and seamlessly integrates with your theme for maximum impact! Elevate your brand with full customization—tweak fonts, colors, and styles to match your unique flair. Plus, experience lightning-fast page loads, ensuring your customers get the answers they need in a blink. Reduce customer support requests with questions and answers! App also easily integrated with Shop app! more Fully customizable FAQ themes to match with your store brand & style. Allows creation of store & product FAQs & product in simplistic & seamless way. Default support for Google rich SEO snippets for your dedicated FAQ page. You can add photos/videos to your question & answers Supports multiple languages that your store supports!

5.0(Reviews)

Add urgency and fear-of-missing-out effects to your sales, and increase conversion and sales Countdown Timer Bar can help you add a sense of urgency in your sales events, make your customers feel they must act now to avoid missing out on something important, and drive more sales. The App supports various types of timers, such as one-time, auto-recurring, daily & weekly timer. You can use them for different sales events. It also offers targeting options including geo location, customer, page, etc. You can have targeted events for different countries, customers, and optimize the sales. Countdown Timer Bar can help you add a sense of urgency in your sales events, make your customers feel they must act now to avoid missing out on something important, and drive more sales. The App supports various types of timers, such as one-time, auto-recurring, daily & weekly timer. You can use them for different sales events. It also offers targeting options including geo location, customer, page, etc. You can have targeted events for different countries, customers, and optimize the sales. more One-time, auto-recurring, daily & weekly timers can fit different types of sales Advanced targeting: location, Shopify markets, customer, page, product, device Scheduling, you can plan sales events in advance for events like Black Friday Fully customizable with various rotation & animation, background images & styles Supports all pages, 1-click to enable, no coding required

4.9(Reviews)

Promote free shipping with progressive messages to motivate customers to buy more & boost sales Free Shipping Bar displays progressive messages when customers put more items in their shopping carts, and lets them know how much more to buy in order to get your free shipping. This increases average order value and boosts sales. The bar is fully customizable with advanced targeting options including geo location, Shopify markets, customer, page, product, etc. You can have multiple free shipping offers for different countries, customers, and optimize the sales. Free Shipping Bar displays progressive messages when customers put more items in their shopping carts, and lets them know how much more to buy in order to get your free shipping. This increases average order value and boosts sales. The bar is fully customizable with advanced targeting options including geo location, Shopify markets, customer, page, product, etc. You can have multiple free shipping offers for different countries, customers, and optimize the sales. more Display messages with progressive shipping goals, and boost sales Advanced targeting: location, Shopify markets, customer, page, product, device Scheduling, you can plan free shipping in advance for events like Black Friday Fully customizable & supports all pages, 1-click to enable, no coding required Auto-detect visitors' local currencies and convert the free shipping amount

4.9(Reviews)

Promote sales on a fully customizable banner, increase customer awareness and boost sales Always keeping your customers in the loop about your business updates, promotions, and events is a key element of managing customer relationships. Quick Announcement Bar makes this easier and quicker. You can add a fully customizable banner on your website with a few clicks, inform your customers. You can have multiple bars shown in rotation or with various animations. You can offer different sales on different bars for different geo locations, customers, pages, etc, and optimize the return. Always keeping your customers in the loop about your business updates, promotions, and events is a key element of managing customer relationships. Quick Announcement Bar makes this easier and quicker. You can add a fully customizable banner on your website with a few clicks, inform your customers. You can have multiple bars shown in rotation or with various animations. You can offer different sales on different bars for different geo locations, customers, pages, etc, and optimize the return. more Present your sales events with a customized bar, increase awareness and sales Advanced targeting geo location, customer, page, product, device targeting Scheduling, you can plan sales in advance for events like Black Friday Fully customizable with various rotation & animation, background images & styles Supports all pages, 1-click to enable, no coding required

4.9(Reviews)

Display product features, descriptions & promotions via banners & icons. Automate product pages! Our app enhances your product page with powerful banners, icons, labels, and text. You can easily highlight your products, and display discount badges, best seller labels, customer reviews, promotion banners, coupon codes, and sale banners for each product on your product page quickly. You can create multiple banners and apply them on different product pages easily. Customizable banners help you make more engaging product pages to get more attention, increase conversions and boost sales. Our app enhances your product page with powerful banners, icons, labels, and text. You can easily highlight your products, and display discount badges, best seller labels, customer reviews, promotion banners, coupon codes, and sale banners for each product on your product page quickly. You can create multiple banners and apply them on different product pages easily. Customizable banners help you make more engaging product pages to get more attention, increase conversions and boost sales. more Create banners for promotion, coupon codes, free shipping, and product features Single or multiple banners to apply on different product pages shortly Customize smart banners with your color, message, text and product descriptions Add icons or emojis to banners and place them above or below add to cart button Add links to banners and make product page buttons. Show discount, coupon code.

3.6(Reviews)

Quick access to product preview in one click without reloading the whole site. Quick View app gives your shoppers quick access to product preview in one click without reloading the whole site. The app will not only reduce shopping time but also bring a convenient experience to shoppers. Your shoppers can view product details quickly without leaving the catalog navigation. This makes browsing products easier and faster, which helps increase conversion rates. Products may be added to the cart from the Product Quick View pop-up. Quick View app gives your shoppers quick access to product preview in one click without reloading the whole site. The app will not only reduce shopping time but also bring a convenient experience to shoppers. Your shoppers can view product details quickly without leaving the catalog navigation. This makes browsing products easier and faster, which helps increase conversion rates. Products may be added to the cart from the Product Quick View pop-up. more Reduce shopping time, and improve customer experience. Increase your sales. Let customers view the product information, add it to cart in a popup Add to wishlist, compare products

3.5(Reviews)

Make customer buy faster with FOMO Count down timer bar (top banner), cart timers and more. Promote Flash Sales by creating urgency, scarcity, and FOMO, prompting customers to Buy Now with sale countdowns and sale timers. Add cart timer, countdown clock, cart countdown, checkout countdown (checkout timer), countdown announcement bar, fomo timer, timer bar, countdown timer bar. Add countdown timer bar to your homepage, product pages, cart, checkout page, password page. Place a beautiful count down timer wherever your theme allows, daily recurring timer, evergreen timers & more. Promote Flash Sales by creating urgency, scarcity, and FOMO, prompting customers to Buy Now with sale countdowns and sale timers. Add cart timer, countdown clock, cart countdown, checkout countdown (checkout timer), countdown announcement bar, fomo timer, timer bar, countdown timer bar. Add countdown timer bar to your homepage, product pages, cart, checkout page, password page. Place a beautiful count down timer wherever your theme allows, daily recurring timer, evergreen timers & more. more Boost Flash Sales: With Sales Countdown Announcement Bar (top bar or bottom bar) Reduce Abandoned Carts: By using a cart timer (checkout page) in your cart. Promote Conversions: Add a product timer, countdown banner or cart countdown. Match Counter Style: Customize text, colors, type, timer schedule & placements. Set Any Schedule: Recurring timer, offer timer, daily timer, session timer, more

4.9(Reviews)

Promote sales by adding payment icons, security icons, shipping icons, product badges. Easily customize icons and discount badges or icons on Shopify cart page/cart drawer, product pages, checkout page, footer or any custom location. Build Social Proof from 10,000+ payment icons, footer icons, trust badge and more. Showcase your store’s security and policies with ultimate trust badge, icons, banners, product badges, feature icons, footer icons, country flag icons, social icons, payment badge, shipping icons, payment icons, trust seals, security icons, and guarantees. Easily customize icons and discount badges or icons on Shopify cart page/cart drawer, product pages, checkout page, footer or any custom location. Build Social Proof from 10,000+ payment icons, footer icons, trust badge and more. Showcase your store’s security and policies with ultimate trust badge, icons, banners, product badges, feature icons, footer icons, country flag icons, social icons, payment badge, shipping icons, payment icons, trust seals, security icons, and guarantees. more Huge Library of Trust Badges, Payment Badges, Product labels & More. Adjust size, font, and color to align with your brand identity. Add banners to product pages or any custom location on your store. Personalize your store with custom footer trust badges (footer payment icons). Preview and optimize trust badges across all devices.

4.9(Reviews)

A community forum to get feedback, run contests, vote, grow a loyal community, boost SEO, and more! Let's face it, reviews look good but they don't let your customers help your brand innovate. Facebook groups, community forum, and survey apps are out of style. Customer insights get buried in social media platforms. HouseParty, encourage customers to leave feedback, vote for existing ideas, and discuss with others right inside your store. With community forum, survey, raise awareness through organic SEO. Over time, the popular community ideas rise to the top helping to inform your decisions. Let's face it, reviews look good but they don't let your customers help your brand innovate. Facebook groups, community forum, and survey apps are out of style. Customer insights get buried in social media platforms. HouseParty, encourage customers to leave feedback, vote for existing ideas, and discuss with others right inside your store. With community forum, survey, raise awareness through organic SEO. Over time, the popular community ideas rise to the top helping to inform your decisions. more Guided Growth: Let customer feedback, insights, survey shape your store roadmap. Replace Facebook Group: Add forum survey style community to your store. Upvote Function: See which ideas are most wanted by your community & customers. Accounts Growth: Give more reason for customers to create an account with you. Grow with SEO: Easy user generated content for organic traffic.

5.0(Reviews)

Increase AOV with cart upsells, free gifts, and rewards. Customize your cart drawer easily Create a customizable cart drawer with cart upsells, free gifts, rewards bars, discount fields, sticky cart features, and product recommendations. Offer BOGO promotions, cart goals, and frequently bought together bundles to encourage larger orders and reduce cart abandonment. Customize the cart experience without editing theme code and manage promotions from a single dashboard Create a customizable cart drawer with cart upsells, free gifts, rewards bars, discount fields, sticky cart features, and product recommendations. Offer BOGO promotions, cart goals, and frequently bought together bundles to encourage larger orders and reduce cart abandonment. Customize the cart experience without editing theme code and manage promotions from a single dashboard more Cart Upsells: Recommend products directly in the cart drawer Rewards Bar: Encourage larger orders with cart goals Free Gifts: Offer automatic gifts based on cart conditions Discount Field: Apply discount codes directly in the cart Sticky Cart Drawer: Keep the cart accessible across the store

4.5(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.