Customize checkout using powerful checkout rules to streamline and boost checkout conversion. Take control of your checkout experience by conditionally showing, hiding, renaming, or reordering shipping and payment methods based on cart total, weight, address, items, tags, or other conditions. Set default options, block invalid checkouts, hide express payment buttons, move store pickup to the bottom, restrict PO Box shipping, apply discounts to orders or shipping methods, and more. Enhance customer satisfaction by streamlining your checkout. Take control of your checkout experience by conditionally showing, hiding, renaming, or reordering shipping and payment methods based on cart total, weight, address, items, tags, or other conditions. Set default options, block invalid checkouts, hide express payment buttons, move store pickup to the bottom, restrict PO Box shipping, apply discounts to orders or shipping methods, and more. Enhance customer satisfaction by streamlining your checkout. more Reorder/Rearrange shipping/payment methods on the checkout page. Hide payment/shipping methods by e-g Cart total, Product tag, Customer tag, etc. Set the default pre-selected shipping or payment method. Offer discounts. Hide express checkout payment buttons from the top of the checkout page. Hide shipping, e-g, UPS, or block checkout, if the address contains a PO box.
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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Add a terms and conditions checkbox. Require customer consent. **BeUniq Agree Terms & Conditions** helps merchants add a terms and conditions checkbox to the cart page, allowing customers to review and accept store policies before proceeding to payment. Once enabled, customers must agree to the terms before completing their order. The app records the customer's consent and displays the accepted terms status in the order details section. Easily customize the checkbox message and policy link to match your store requirements without coding. Provide a transpare **BeUniq Agree Terms & Conditions** helps merchants add a terms and conditions checkbox to the cart page, allowing customers to review and accept store policies before proceeding to payment. Once enabled, customers must agree to the terms before completing their order. The app records the customer's consent and displays the accepted terms status in the order details section. Easily customize the checkbox message and policy link to match your store requirements without coding. Provide a transpare more Add a terms and conditions checkbox on the cart page. Require customer agreement before proceeding to checkout. Record customer consent with order details. PopUp and Inline option to show Agree Terms Checkbox Customize the checkbox appearance to match your store theme.
Add external link buttons to products, blogs, and pages for Amazon, eBay, WhatsApp, and more. BeUniq External Links lets you add customizable external link buttons to product pages, blog articles, and content pages without modifying your theme code. Installation is quick and simple—just enable the app and start adding links. Direct customers to affiliate products, partner websites, marketplaces, or other external resources with ease. Perfect for bloggers, affiliates, and merchants who want to expand buying options while maintaining a seamless shopping experience. BeUniq External Links lets you add customizable external link buttons to product pages, blog articles, and content pages without modifying your theme code. Installation is quick and simple—just enable the app and start adding links. Direct customers to affiliate products, partner websites, marketplaces, or other external resources with ease. Perfect for bloggers, affiliates, and merchants who want to expand buying options while maintaining a seamless shopping experience. more One Click Install - No coding skills required. Unique links for each blog article, page and product page. Multiple links Support. Add any custom link. Hide Add to cart on product page | Mobile compatible. You can customize the button style according to your theme design.
Show a free shipping progress bar. Help customers track cart goals. **BeUniq Free Shipping Bar** helps merchants increase average order value by motivating customers to reach a free shipping goal. Display a customizable progress bar that updates in real time as shoppers add products to their cart, showing how much more they need to spend to qualify for free shipping. Customize the bar to match your store's branding without coding. Encourage larger purchases, improve conversions, and create a more engaging shopping experience. **BeUniq Free Shipping Bar** helps merchants increase average order value by motivating customers to reach a free shipping goal. Display a customizable progress bar that updates in real time as shoppers add products to their cart, showing how much more they need to spend to qualify for free shipping. Customize the bar to match your store's branding without coding. Encourage larger purchases, improve conversions, and create a more engaging shopping experience. more Display a real-time free shipping progress bar that updates as customers shop. Set customizable free shipping goals to encourage higher cart values. Motivate clients to add more products to cart to achieve free shipping cart goal Customize colors, text, icons, and styling to match your store's branding. Fast-loading, mobile-friendly design for a seamless shopping experience.
Add a Buy Now button. Skip the cart and go straight to checkout. BeUniq Buy Now Button lets merchants add a customizable, animated Buy Now button to product pages without editing theme code. Customers can skip the cart page and go directly to checkout for a faster purchasing experience. Easily customize the button's style and placement from the Theme Editor. Compatible with Online Store 2.0, the app provides a seamless shopping experience across desktop and mobile devices while simplifying the path to checkout. BeUniq Buy Now Button lets merchants add a customizable, animated Buy Now button to product pages without editing theme code. Customers can skip the cart page and go directly to checkout for a faster purchasing experience. Easily customize the button's style and placement from the Theme Editor. Compatible with Online Store 2.0, the app provides a seamless shopping experience across desktop and mobile devices while simplifying the path to checkout. more Let customers skip the cart and go directly to checkout. Increase sales and reduce abandoned carts Match the button style with your store's branding and theme. Add animations to Buy now button. Single product or Mixed cart
Add customizable image, video, and PDF size guides to any product. **BeUniq Size Chart** helps merchants create and display customizable size guides using images, PDFs, videos, or editable tables. Show size charts as a button, text link, popup, or inline section on product pages for a seamless shopping experience. Easily customize the design to match your store's theme without coding. Help customers choose the right size with clear, informative guides that reduce sizing uncertainty, improve confidence, decrease returns, and increase conversions. **BeUniq Size Chart** helps merchants create and display customizable size guides using images, PDFs, videos, or editable tables. Show size charts as a button, text link, popup, or inline section on product pages for a seamless shopping experience. Easily customize the design to match your store's theme without coding. Help customers choose the right size with clear, informative guides that reduce sizing uncertainty, improve confidence, decrease returns, and increase conversions. more Help reduce size-related returns and increase purchase confidence. Create size charts with images, videos, PDFs, or editable tables. Assign unique size charts to specific products or collections. Size chart as Pop up or Inline. Easy step to relocate size chart link Responsive design for desktop, tablet, and mobile devices.
Transform Visitors into Your Sales fleet Bevy Share Cart adds a sleek share button to your store's cart page, allowing customers to share their shopping carts on social media with a single click. When recipients click the shared link, they can instantly replicate the exact cart and proceed to checkout, creating a seamless social shopping experience. Bevy Share Cart seamlessly integrates with your Shopify store, adding a powerful social sharing capability that helps expand your reach and drive conversions. Bevy Share Cart adds a sleek share button to your store's cart page, allowing customers to share their shopping carts on social media with a single click. When recipients click the shared link, they can instantly replicate the exact cart and proceed to checkout, creating a seamless social shopping experience. Bevy Share Cart seamlessly integrates with your Shopify store, adding a powerful social sharing capability that helps expand your reach and drive conversions. more Track cart sharing activity and revenue generated from shared carts Choose between automatic or manual installation to fit your store setup Select from pre-built themes or customize to match your brand identity Incentivize sharing by rewarding customers who share their carts
Easily create beautiful, professional size charts for your store. Create clean size charts for all your size variations. Customize with text and images in our custom text boxes. For tshirts, apparel brands, shoe size charts, & detail body measurement. Create smart size charts based on collections and product tags. Previously known as Best Fit Size Charts. Use with Vajro, seize charte, image size chart, VO Product option, product page size chart, fb size chart pop up, size guide app, sizing guide Create clean size charts for all your size variations. Customize with text and images in our custom text boxes. For tshirts, apparel brands, shoe size charts, & detail body measurement. Create smart size charts based on collections and product tags. Previously known as Best Fit Size Charts. Use with Vajro, seize charte, image size chart, VO Product option, product page size chart, fb size chart pop up, size guide app, sizing guide more BF Sizechart app built to reduce returns, because size matters on every product. Use our sizeguide app for sizing charts to convert cm/ inches measurements. Build your BF Sizing Chart and add a size table on your product pages. Jewelry ring size chart app, ring sizer app as a size finder product comparison. Smart size chart, size app, size guides fit finder, size guide app, sizing guide
Make beautiful bundle builders, mix and match product bundles, build your own bundle & build a box. Biscuits Bundles is a BYOB bundle builder for mix and match products. Let customers build your own bundle or build a box product bundles with mix and match bundle discounts. Use pricing rules like volume discounts, quantity breaks, fixed pricing, or percentage off. Control min/max selections and total quantity limits per step. Perfect for mix and match product bundles, product bundles customizable, personalised kits & mix and match bundle gift sets. Supports language translations across Markets. Biscuits Bundles is a BYOB bundle builder for mix and match products. Let customers build your own bundle or build a box product bundles with mix and match bundle discounts. Use pricing rules like volume discounts, quantity breaks, fixed pricing, or percentage off. Control min/max selections and total quantity limits per step. Perfect for mix and match product bundles, product bundles customizable, personalised kits & mix and match bundle gift sets. Supports language translations across Markets. more BYOB Bundle builder with collapsible steps to guide customers through choices. Mix and match bundle with min/max selections, display options & quantity limits. Build a box with fixed price, percentage/amount off, or volume discount pricing. Customise your product bundles in the theme editor with advanced options. Build your own bundle with language translations across Shopify Markets.
Reward shoppers with loyalty points and perks — and capture them with one-tap social login. bitLoyalty is a complete loyalty and rewards program for Shopify. Customers earn points on every order and redeem them for discounts and free shipping — so one-time buyers come back. It starts at sign-in: shoppers join in one tap with Google, Apple or WhatsApp, so you capture first-party customers and grow your list. Keep points, vouchers and customer profiles in one place, and let your AI answer "how many points do I have?" right in your store's live chat. bitLoyalty is a complete loyalty and rewards program for Shopify. Customers earn points on every order and redeem them for discounts and free shipping — so one-time buyers come back. It starts at sign-in: shoppers join in one tap with Google, Apple or WhatsApp, so you capture first-party customers and grow your list. Keep points, vouchers and customer profiles in one place, and let your AI answer "how many points do I have?" right in your store's live chat. more Enable 10+ social logins: Google, Instagram, WA, FB, Apple & more in one click WhatsApp OTP for secure sign‑in Boost conversions with engaging sign-up and voucher pop-ups Earn loyalty points automatically on every order Ask your points in live chat — your AI answers on the spot
Blockify Age verification popup: Age check, Age verify, Terms & Conditions, Ensure Legal Compliance Blockify - Age Verifier: Safeguard your Shopify store and maintain legal compliance & privacy with our fully customizable 18+, 21+ age verification popup - no coding required! Effortlessly set up age verification using the birth date option. Limit age or set age restrictions on accessing your store and age checkout. With our age verification app, you can swiftly create a secure age checker and compliant website in just a few clicks. Protect your store with an Terms and Conditions Checkbox. Blockify - Age Verifier: Safeguard your Shopify store and maintain legal compliance & privacy with our fully customizable 18+, 21+ age verification popup - no coding required! Effortlessly set up age verification using the birth date option. Limit age or set age restrictions on accessing your store and age checkout. With our age verification app, you can swiftly create a secure age checker and compliant website in just a few clicks. Protect your store with an Terms and Conditions Checkbox. more Age verifier: Ensure legal compliance with the Age Verification Popup Set a minimum age requirement with Date of Birth verification Choose from age popup templates or customize them to match your store branding Restriction age popup looks good on different screen resolutions Terms & Conditions for terms of service, privacy policy, policies and contracts.
Intelligent search and merchandising that drives immediate ROI and RPV. Bloomreach Discovery offers AI-Driven product discovery focused on ROI. It leverages Loomi, our industry leading AI for ecommerce, to further drive product discovery. The Bloomreach Discovery x Shopify connector significantly simplifies your implementation to make sure pixel data from your storefront is fed appropriately into Bloomreach Discovery. Build your storefront quicker with a templated search UI and components for search results pages, facets and autosuggest. Bloomreach Discovery offers AI-Driven product discovery focused on ROI. It leverages Loomi, our industry leading AI for ecommerce, to further drive product discovery. The Bloomreach Discovery x Shopify connector significantly simplifies your implementation to make sure pixel data from your storefront is fed appropriately into Bloomreach Discovery. Build your storefront quicker with a templated search UI and components for search results pages, facets and autosuggest. more Autosuggest guides your site visitors and maximizes relevance of search results Search & category pages make it easy for shoppers to navigate your products. Bloomreach Recommendations displays recommended products powered by our Loomi AI
Increase AOV with free shipping bars, multi-tier progress bar, discount goals, and cart upsells BlueCart adds a free shipping bar, discount milestones, and tiered rewards to your cart drawer using a progress bar and goal checklist. Customers see how close they are to free shipping, a discount, or a free gift, motivating them to add more items and increase their order value. Show product upsell recommendations directly in the cart drawer. Target specific audiences with display conditions based on market, customer tags, or UTM parameters. Auto-convert currencies for international buyers. BlueCart adds a free shipping bar, discount milestones, and tiered rewards to your cart drawer using a progress bar and goal checklist. Customers see how close they are to free shipping, a discount, or a free gift, motivating them to add more items and increase their order value. Show product upsell recommendations directly in the cart drawer. Target specific audiences with display conditions based on market, customer tags, or UTM parameters. Auto-convert currencies for international buyers. more Add cart upsell & shipping progress bar anywhere using app block & shortcode Target offers by market, customer tag, UTM source, cart value, or currency Set buyer-market shipping goals with automatic currency conversion Recommend one-click upsell products in the cart drawer Floating cart button so buyers can track reward progress from any page
Scale your sales with BOGO, buy x get y, free gift, product bundles, volume discounts, and upsell BOGOS, formerly Free Gifts by Secomapp, is a trusted promotion app for creating BOGO, BXGY, free gift with purchase, bundles, upsell, and volume discounts. Over 12 years, BOGOS has helped 95K+ brands run offers seamlessly at scale, generate more orders and elevate shopping experience. All widgets are fully customizable and built to convert. It also supports POS & Headless, provides advanced targeting, analytics, translation. Prompt chat, technical support, and AI assistant are always available. BOGOS, formerly Free Gifts by Secomapp, is a trusted promotion app for creating BOGO, BXGY, free gift with purchase, bundles, upsell, and volume discounts. Over 12 years, BOGOS has helped 95K+ brands run offers seamlessly at scale, generate more orders and elevate shopping experience. All widgets are fully customizable and built to convert. It also supports POS & Headless, provides advanced targeting, analytics, translation. Prompt chat, technical support, and AI assistant are always available. more Offer buy one get one free, buy x get y, and GWP with auto add to cart or popup Create fixed bundles, bundle builder (build a box), and mix and match Set up volume discounts, tiered discounts, cart discount, discount on cheapest Checkout upsell using discount code, frequently bought together & thank you page Promote offers with progress bar, announcement bar, today offer, and offer page
AI upsells at every touchpoint. More revenue per order, every order. Most upsell tools cover one or two touch-points. Bold Upsell covers all of them: product pages, cart, checkout, post-purchase, and email, with AI-powered offers that get smarter with every transaction. Use Smart AI to surface the highest-converting offers automatically, or build your own funnels with manual controls. Chain offers so every accept triggers the next opportunity. True upsells, cross-sells, order bumps, Buy X Get Y, and subscribe-to-save, at every stage. Commission based pricing. Most upsell tools cover one or two touch-points. Bold Upsell covers all of them: product pages, cart, checkout, post-purchase, and email, with AI-powered offers that get smarter with every transaction. Use Smart AI to surface the highest-converting offers automatically, or build your own funnels with manual controls. Chain offers so every accept triggers the next opportunity. True upsells, cross-sells, order bumps, Buy X Get Y, and subscribe-to-save, at every stage. Commission based pricing. more AI-powered offers that get smarter with every order or build manual funnels More ways to style: pop-ups, embedded offers, list and carousel layouts Post Purchase Funnels and Free Gifts that auto-add on conditions Turn one-time buyers into subscribers with native Bold Subscriptions integration Track revenue, AOV lift, conversions, and funnel performance in one dashboard
Compliant 14-day withdrawal widget for EU stores. 24 languages, audit trail, automated emails. Every EU customer has 14 days to withdraw an online order under Directive 2011/83/EU. BOO replaces inbox back-and-forth with a multi-language storefront widget and one dashboard for your team. Auto-confirm receipt by email in 24 EU languages. Track every request through Received, Processing, Completed and Rejected. The 14-day clock starts from the last delivered package — handled for you. GDPR-aware: data is removed via Shopify redact webhooks. Every EU customer has 14 days to withdraw an online order under Directive 2011/83/EU. BOO replaces inbox back-and-forth with a multi-language storefront widget and one dashboard for your team. Auto-confirm receipt by email in 24 EU languages. Track every request through Received, Processing, Completed and Rejected. The 14-day clock starts from the last delivered package — handled for you. GDPR-aware: data is removed via Shopify redact webhooks. more 14-day deadline auto-calculated from the last delivered package (Article 9(2)) Storefront widget in 24 EU languages, auto-detected from customer locale Status pipeline: Received, Processing, Completed, Rejected — bulk update Dashboard CSV export and per-request PD track and manage all withdrawal requests GDPR-aware: customer data removed via Shopify redact webhooks
One booking app for 100+ servicing models: Appointments| Rentals| Events| Concerts| One day booking| Introducing all-in-one booking app, Designed to serve 100+ servicing models. Effortlessly manage appointments, events, one day booking, concerts, rentals- whether by the hour or day-wise. Advanced features like QR code generator, Google Meet, calendar integration, Booking without checkout, security deposits, single/multi-user or multi-day options, in-person booking, & staff management. Different booking layouts to choose from. Launch with-in 1 hour. No technical expertise needed. Introducing all-in-one booking app, Designed to serve 100+ servicing models. Effortlessly manage appointments, events, one day booking, concerts, rentals- whether by the hour or day-wise. Advanced features like QR code generator, Google Meet, calendar integration, Booking without checkout, security deposits, single/multi-user or multi-day options, in-person booking, & staff management. Different booking layouts to choose from. Launch with-in 1 hour. No technical expertise needed. more Interface to Add Booking Feature to the Products| Automate Google Meet links| Offer service to customers as Doctors|Dance classes|Tuition's|Consultations| etc Manage Booking i operations l.e. Approve,Reschedule,Cancel the Customer Booking. Easily blackout certain dates from the booking period. Admin can add Custom Fields and Custom Information with the Product on Booking.
Scheduler & calendar widget for reservations, workshops, event booking, classes, rentals & ticketing Bookeasy is a no-code online booking system like Eventbrite. Manage appointment booking for doctor clinic consultation, spa, salon, studio, boutique, pet grooming, restaurant or webinar. Scale with rental booking, hotel booking, event ticketing & bundle booking with capacity limits. Enable payment less appointment for sport, court, venue, course & restaurant booking. Set unique schedules, blockout holidays, send reminders, rent & book with ease. Perfect for any service-based business. Bookeasy is a no-code online booking system like Eventbrite. Manage appointment booking for doctor clinic consultation, spa, salon, studio, boutique, pet grooming, restaurant or webinar. Scale with rental booking, hotel booking, event ticketing & bundle booking with capacity limits. Enable payment less appointment for sport, court, venue, course & restaurant booking. Set unique schedules, blockout holidays, send reminders, rent & book with ease. Perfect for any service-based business. more Create hourly, full-day & multi-day appointment with capacity & booking deadline Manage team members & locations with unique schedules & service booking form Offer payment less appointments & add booking widget on any page without product Sync & integrate services with Google Calendar, Google Meet, Zoom & Klaviyo Customers reschedule & manage bookings via user-friendly self-service dashboard
Increase sales with AI Search, advanced filters, and smarter product discovery Help shoppers find exactly what they want faster with AI search built to increase conversions. Deliver instant, relevant results even with typos, vague searches, or large catalogs. Keep shoppers engaged with advanced filters, then grow AOV with personalized recommendations and bundles. No coding needed, just fast setup, easy customization, eye-catching merchandising and seamless theme integration Plus, our team’s here to support you every step of the way. Help shoppers find exactly what they want faster with AI search built to increase conversions. Deliver instant, relevant results even with typos, vague searches, or large catalogs. Keep shoppers engaged with advanced filters, then grow AOV with personalized recommendations and bundles. No coding needed, just fast setup, easy customization, eye-catching merchandising and seamless theme integration Plus, our team’s here to support you every step of the way. more Real-time search results, even with typos or unclear search terms. Help shoppers navigate with filters by tag, metafield, and variant. More AOV with AI Bundles: grow cart size using personalization & recommendations Pin, boost, or reorder products to showcase top-performing items. Global Scale Multi-language, currency & marketplaces synced across storefronts.
Boost AOV with BUNDLE, Volume Discount, Gift Boxes , Upsell - Cross Sell and Milestone Rewards! Increase average order value with Boost My Cart, the all-in-one Shopify app for cart optimization and product bundling. Create customizable bundles with logo uploads and gift box options, offer milestone rewards, recommend products through upsells and cross-sells, promote offers with announcement bars, and personalize carts with notes. Manage everything from one easy-to-use dashboard. Increase average order value with Boost My Cart, the all-in-one Shopify app for cart optimization and product bundling. Create customizable bundles with logo uploads and gift box options, offer milestone rewards, recommend products through upsells and cross-sells, promote offers with announcement bars, and personalize carts with notes. Manage everything from one easy-to-use dashboard. more Smart Cart Upsells, Cross-sells & Milestone Rewards Build Custom Bundles with Logo Upload & Gift Box Options Empty Cart Upsells to Recover Lost Sales Promote Offers with Custom Announcement Bars Personalize Shopping with Cart Notes
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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.