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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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Implement EU Directive 2023/2673: Withdrawal button without login requirement according to EU law Starting 2026, the withdrawal button becomes mandatory under EU Directive 2023/2673. Integrate the legally required EU withdrawal button directly into your store today. Customers can initiate their withdrawal directly in the shop - without needing to log in. The app then automatically sends the legally required confirmation via email. Integrate the button in minutes without coding and manage all requests efficiently in your dashboard. Audit reporting, fully customizable form - get ready for 2026 Starting 2026, the withdrawal button becomes mandatory under EU Directive 2023/2673. Integrate the legally required EU withdrawal button directly into your store today. Customers can initiate their withdrawal directly in the shop - without needing to log in. The app then automatically sends the legally required confirmation via email. Integrate the button in minutes without coding and manage all requests efficiently in your dashboard. Audit reporting, fully customizable form - get ready for 2026 more Permanently visible EU withdrawal button directly in the shop | EU 2023/2673 Withdrawal according to EU guidelines, also available for guest buyers Automated delivery of the receipt confirmation email after every withdrawal Clear overview of all requests with complete documentation Audit report of all processes as a PDF file for your compliance documentation

4.9(Reviews)

A beautifully integrated app for booked or ticketed retail experiences. Bring people together. The Experiences app adds bookable retail experiences to your store and helps you stay on-brand, at your domain, without a third-party booking system getting in the way. Use our basic booking features or our advanced eTicketing feature to invite your customers (and their friends) to have memorable experiences with your brand at the center. Our support is here when you need extra help. The Experiences app adds bookable retail experiences to your store and helps you stay on-brand, at your domain, without a third-party booking system getting in the way. Use our basic booking features or our advanced eTicketing feature to invite your customers (and their friends) to have memorable experiences with your brand at the center. Our support is here when you need extra help. more Automatically integrates with any Shopify theme. Offers booked experiences fast. Customizable email and text reminders to remind customers to show up. Embed a calendar or list of all your experiences easily. Use our Shopify POS check-in app or our iOS and Android check-in app.

4.8(Reviews)

Quick Buy Button- Customers buy products directly from the homepage, collection page & products list Quick Buy Button enhances the customer experience and reduces abandoned carts by making checkout as quick as possible. Quickly buy products from home or collection pages or products list and navigate the customer directly to the checkout page. The eye-catching quick buy button draws user attention to impulse purchases. Quick buy button lets customers can add products to their cart from home or jump straight to checkout. Improve conversion rate with a quick purchase button option. Buy Now Button! Quick Buy Button enhances the customer experience and reduces abandoned carts by making checkout as quick as possible. Quickly buy products from home or collection pages or products list and navigate the customer directly to the checkout page. The eye-catching quick buy button draws user attention to impulse purchases. Quick buy button lets customers can add products to their cart from home or jump straight to checkout. Improve conversion rate with a quick purchase button option. Buy Now Button! more Let customers buy products directly from the homepage and collection pages Let Customers add to cart products from the homepage or collection page Quick Buy button triggers impulse purchase and reduces abandoned cart Quick Add to Cart Icon button and text button to buy from the collection page Buy Now Button on the home page or collection page and skip to checkout directly

3.5(Reviews)

Floating add to cart button to reduce cart abandonment, lightweight and mobile responsive design What are the features? Floating cart to reduce cart abandonment, lightweight and mobile responsive design, improve user experience and increase conversion by showing always visible Sticky Add to Cart to your customers on the Product page!How does it work? Install the app with one click, the app works with every theme and requires no coding or changes. You can choose the style of a sticky bar and floating cart to start with. You can also modify colors, styles, and texts according to you What are the features? Floating cart to reduce cart abandonment, lightweight and mobile responsive design, improve user experience and increase conversion by showing always visible Sticky Add to Cart to your customers on the Product page!How does it work? Install the app with one click, the app works with every theme and requires no coding or changes. You can choose the style of a sticky bar and floating cart to start with. You can also modify colors, styles, and texts according to you more The app will improve your sales. You will get more sales with sticky cart Customize colors, backgrounds, text, position & more to match your site Easy to install, just one click to make it works

0.0(Reviews)

Customize product with product personalizer & variants options to boost unique shopping experiences. EZ Product Options helps merchants customize product and create unlimited product options, variants with ease. From text boxes, image dropdowns, and swatches to file uploads and conditional logic, you can build a smooth customization experience for your customers. The app is mobile-friendly, integrates easily with your store design, and saves time by reducing the need for duplicate variants. Merchants can offer personalized products, improve customer experience, and boost sales effortlessly. EZ Product Options helps merchants customize product and create unlimited product options, variants with ease. From text boxes, image dropdowns, and swatches to file uploads and conditional logic, you can build a smooth customization experience for your customers. The app is mobile-friendly, integrates easily with your store design, and saves time by reducing the need for duplicate variants. Merchants can offer personalized products, improve customer experience, and boost sales effortlessly. more Add text fields, dropdowns, checkboxes, color swatches, file uploads, and more. AI suggests optimal product options automatically based on product details No coding needed, works instantly on any theme, desktop & mobile ready.

4.1(Reviews)

Increase sales with customizable banners and countdowns that create urgency and boost conversions. Motivate customers to take prompt action with effective tools to achieve higher conversion rates. Maximize sales and turn visitors into customers using powerful features. These include animated timers to create a sense of urgency, promotional codes to incentivize purchases, attention-grabbing tickers, and discount badges to highlight special offers. Motivate customers to take prompt action with effective tools to achieve higher conversion rates. Maximize sales and turn visitors into customers using powerful features. These include animated timers to create a sense of urgency, promotional codes to incentivize purchases, attention-grabbing tickers, and discount badges to highlight special offers. more Drive FOMO with countdown timers and make conversions rise. Increase sales with unique and eye-catching designs. Highlight special offers with visually striking discount badges. Navigate effortlessly with Shopify-native interface elements. Adapt designs for various content types with ease.

0.0(Reviews)

Easily create FAQ pages & product FAQs to engage customers, build trust, and reduce support tickets. Our FAQs app helps you easily create professional FAQs for products, pages, or your help center without coding. Use ready-made templates or design custom help center FAQs that match your brand style. Let customers directly ask questions with the "Ask Question" feature. Build trust with clear, helpful answers. Organize FAQs into groups, display them anywhere in your store, and reduce support tickets effortlessly. Improve overall customer support by answering common queries upfront Our FAQs app helps you easily create professional FAQs for products, pages, or your help center without coding. Use ready-made templates or design custom help center FAQs that match your brand style. Let customers directly ask questions with the "Ask Question" feature. Build trust with clear, helpful answers. Organize FAQs into groups, display them anywhere in your store, and reduce support tickets effortlessly. Improve overall customer support by answering common queries upfront more Create product & page FAQs with custom or predefined questions easily. Engage users with an "Ask a Question" option for direct customer queries. Help customers get instant answers and reduce repetitive support tickets. Group FAQs for clean, organized navigation on product or help pages. Fully customizable, mobile-friendly, and works with all Shopify themes.

5.0(Reviews)

Build a trusted help center with easy FAQ tools. Our versatile FAQ app is crafted to enhance your help center and provide seamless support for your customers. With this app, you can effortlessly manage your FAQs, ensuring a smooth and efficient user experience. Here are some of the key features: Customize your FAQ visibility by hiding specific categories as needed.Our FAQ app functions independently and requires no changes to your theme, meaning no coding or programming skills are necessary. Include a robust search feature in your FAQ widget. Our versatile FAQ app is crafted to enhance your help center and provide seamless support for your customers. With this app, you can effortlessly manage your FAQs, ensuring a smooth and efficient user experience. Here are some of the key features: Customize your FAQ visibility by hiding specific categories as needed.Our FAQ app functions independently and requires no changes to your theme, meaning no coding or programming skills are necessary. Include a robust search feature in your FAQ widget. more Add helpcenter FAQ accordion to organize questions. Design an easy FAQ page with responsive accordion FAQ layout & search bar. Organize FAQs into categories like Shipping, Returns, Product related FAQs Effortlessly add an unlimited number of FAQs to your website quickly

4.7(Reviews)

Boost sales with Product FAQ, FAQs Page, faq accordion, Helpdesk, Help Center, FAQs Section. FAQbucket is designed to boost sales on your store by creating add FAQs for your cart, blog FAQ, Blog Post FAQ, Collections Page FAQ, and even Password Page FAQ for seamless navigation. Limitless options and unlimited FAQ pages. Provide information for each product with Individual Product FAQs. Transform FAQ into a upsell cross sell tool also improve client support, helping clients make purchase decisions with confidence while reducing the workload of your support Helpdesk & faq accordion. FAQbucket is designed to boost sales on your store by creating add FAQs for your cart, blog FAQ, Blog Post FAQ, Collections Page FAQ, and even Password Page FAQ for seamless navigation. Limitless options and unlimited FAQ pages. Provide information for each product with Individual Product FAQs. Transform FAQ into a upsell cross sell tool also improve client support, helping clients make purchase decisions with confidence while reducing the workload of your support Helpdesk & faq accordion. more 22+ Pre build Templates with Customization options, Quick Setup and Live Editor FAQ Widget/FAQs Bubble for Easy Access with WhatsApp, Messenger, Helpdesk & more Individual Product FAQs, Product in FAQs, Blog Page FAQs, FAQ Sections Unlimited FAQs pages, Accordions Pro, Product Tabs and Easy Navigation Dynamic, Context-Specific FAQs on Every Page, Password Page FAQs & Cart Page FAQ

5.0(Reviews)

Helps you easily and quickly build a beautiful FAQ page or Product FAQ, suit your store theme. A FAQ page - Product question is one part important and must-have sections for business and product websites. FAQ page - Product question on your store helps saving hours worth of sales calls or emails and helping potential buyers make a decision all by themselves, help generate more sales and leads for your business. With Pavo FAQ app, it helps you easily and quickly build a beautiful FAQ page or Product FAQ, suit your store theme and informative to support your customers. A FAQ page - Product question is one part important and must-have sections for business and product websites. FAQ page - Product question on your store helps saving hours worth of sales calls or emails and helping potential buyers make a decision all by themselves, help generate more sales and leads for your business. With Pavo FAQ app, it helps you easily and quickly build a beautiful FAQ page or Product FAQ, suit your store theme and informative to support your customers. more Comes with responsive features so your FAQ page - Product question Use ajax to add FAQ group, question & answer without reload the page FAQ Schema markup Easy to paste FAQ content, add image, embed video with smart editor. Show FAQ anywhere: show different FAQ on different product page (Product Q&A)

4.7(Reviews)

Relieve your support by adding customizable FAQs powered by Metaobjects to your store. FAQs on Metaobjects enables you to enrich your store's content with pre-defined answers to frequently asked questions, reducing time spent on support. They are built on Shopify's native Metaobjects to provide you with data ownership, unchanged performance, and good SEO. Structured data for Google's Rich Snippets is included out of the box. The app creates the metaobject definition for you, explains the content management steps, and provides you with theme blocks to use in the template editor. FAQs on Metaobjects enables you to enrich your store's content with pre-defined answers to frequently asked questions, reducing time spent on support. They are built on Shopify's native Metaobjects to provide you with data ownership, unchanged performance, and good SEO. Structured data for Google's Rich Snippets is included out of the box. The app creates the metaobject definition for you, explains the content management steps, and provides you with theme blocks to use in the template editor. more Stored as Metaobjects in your store. Output limited to 1000 entries by Shopify. Server-side rendered with Liquid: Good for SEO, performance, and compatibility. Customizable, pre-designed storefront blocks: Easily integrate it in your store. Developer-friendly: Customize all blocks using your own custom CSS styling. Shopify API: Use the official Shopify API to manage entries programmatically.

0.0(Reviews)

Inspire shoppers to discover products they want to buy right now. Fast Simon pairs your merchandising judgment with a commerce-native AI model. It reads shopper intent from the first visit, weighing it with your catalog, inventory, promotions, and business rules. Then, it ranks search, collections, and recommendations toward the goals you set. You stay in control: pin, boost and curate products, add badges and promo tiles, build Complete the Look and set guardrails for AI shopping agents. Works headless via API, JS SDK and Hydrogen. Fast Simon pairs your merchandising judgment with a commerce-native AI model. It reads shopper intent from the first visit, weighing it with your catalog, inventory, promotions, and business rules. Then, it ranks search, collections, and recommendations toward the goals you set. You stay in control: pin, boost and curate products, add badges and promo tiles, build Complete the Look and set guardrails for AI shopping agents. Works headless via API, JS SDK and Hydrogen. more AI merchandising that optimizes every collection without manual sorting AI personalization from the first visit that respects stock and sizes Conversational AI search that understands questions, typos, SKUs and images AI shopping agents that apply your promotions and merchandising rules Promo tiles, badges and display controls to carry your brand expression

4.8(Reviews)

Boost AOV with product bundles, upsell, bundle builder, free gift, BOGO, FBT, and volume discounts Create product bundles that increase AOV with bundle and upsell offers, product add-ons, cross-sell recommendations, and AI-powered Frequently Bought Together. Build mix & match bundles, fixed bundles, BOGO, Buy X Get Y, free gift with purchase, and build-your-own bundles with Bundle Builder. Show upsell offers on product pages to help customers add complementary products before checkout. Use volume discounts and quantity breaks as upsell offers in one bundle app for higher-value bundle orders. Create product bundles that increase AOV with bundle and upsell offers, product add-ons, cross-sell recommendations, and AI-powered Frequently Bought Together. Build mix & match bundles, fixed bundles, BOGO, Buy X Get Y, free gift with purchase, and build-your-own bundles with Bundle Builder. Show upsell offers on product pages to help customers add complementary products before checkout. Use volume discounts and quantity breaks as upsell offers in one bundle app for higher-value bundle orders. more Create free gift with purchase, BOGO, Buy X Get Y, upsell, and bundle offers Build mix & match bundles, fixed bundles, and custom kits with Bundle Builder Boost AOV with FBT, product add-ons, cross-sell & upsell recommendations Use volume discounts and quantity breaks as upsell offers for larger orders Create bundle offers for product pages & Shopify POS with POS-ready options

5.0(Reviews)

Link products as variants. Group products as Combined Listings with custom image/color swatches Create combined listings and link products as variants without merging records - keep each product's URL, title, images & feed data. Group products with AI and in bulk with title, tag, SKU or metafield. Per-variant URLs optimize SEO with no impact on page load. Color, image, two-color, text & pill swatches on product pages & collection cards. Multi-option, subcategory & nested product groups. Auto-syncs product info instantly. Works with every theme, plan & headless. Live chat support included. Create combined listings and link products as variants without merging records - keep each product's URL, title, images & feed data. Group products with AI and in bulk with title, tag, SKU or metafield. Per-variant URLs optimize SEO with no impact on page load. Color, image, two-color, text & pill swatches on product pages & collection cards. Multi-option, subcategory & nested product groups. Auto-syncs product info instantly. Works with every theme, plan & headless. Live chat support included. more Link separate products into combined listings for a better buying experience Make color swatches fit your store's look with unlimited customization options Linked product variants swatches color grouping w/ image variant or color swatch Customize variant picker with color swatches, image swatches, drop-downs & more Auto-hide/disable out of stock & unpublished products

5.0(Reviews)

Turn Instagram posts into shoppable content. Tag each product and let visitors tap to add to cart. Browsing Instagram and then hunting a product on your store costs sales. Feedfy embeds your Instagram feed in your Shopify store and turns each photo into a shoppable post. Tag the products shown in any picture, and visitors tap a photo to open a popup with the product, variant selector, and add-to-cart button, without leaving the page. A dedicated Instagram shop page is included, posts sync automatically, and layout, columns, popup colors, and button styles match your brand. Browsing Instagram and then hunting a product on your store costs sales. Feedfy embeds your Instagram feed in your Shopify store and turns each photo into a shoppable post. Tag the products shown in any picture, and visitors tap a photo to open a popup with the product, variant selector, and add-to-cart button, without leaving the page. A dedicated Instagram shop page is included, posts sync automatically, and layout, columns, popup colors, and button styles match your brand. more Dedicated Instagram shop page ready to publish alongside your product pages Embed shoppable Instagram feeds on any page of your Shopify store Tag multiple products per photo and let shoppers buy in a single tap Customers pick variants and add to cart without leaving the current page Match your brand with custom layouts, colors, columns, and popup styles

4.4(Reviews)

Organize your collections and make it easy for customers to find what they are looking for! Customers can't buy what they can't find. Shops with large catalogs or lots of variants like color, size, or brand can find that navigation quickly gets out of hand. It becomes overwhelming for shoppers to click through pages and pages of products in order to find what they’re looking for. This where the Collection Filter app steps in to help! It helps organize your collections so customers can find what they need and you're more likely to make a sale. Customers can't buy what they can't find. Shops with large catalogs or lots of variants like color, size, or brand can find that navigation quickly gets out of hand. It becomes overwhelming for shoppers to click through pages and pages of products in order to find what they’re looking for. This where the Collection Filter app steps in to help! It helps organize your collections so customers can find what they need and you're more likely to make a sale. more Create custom filters like type, vendor, size, and color. Use filters as custom navigation menus to help shoppers find their way around. Show or hide out of stock variants. Use the autotag feature to have the app sort and tag products for you. Give customers to select their preferred size or color across collections.

4.5(Reviews)

Enterprise-grade search, merchandising, filters & personalization - made easy. Findify offers enterprise-grade & AI-powered Personalized Search & Merchandising, Smart Collections & Recommendations. While merchants can choose to let Findify’s unique personalization algorithm do all the heavy lifting, they also retain full control to tailor the customer experience, should they wish to. Solutions are also fully customizable to fit with every merchant’s brand & style. | App including Findify's brand new Native Shopify Liquid Integration. Findify offers enterprise-grade & AI-powered Personalized Search & Merchandising, Smart Collections & Recommendations. While merchants can choose to let Findify’s unique personalization algorithm do all the heavy lifting, they also retain full control to tailor the customer experience, should they wish to. Solutions are also fully customizable to fit with every merchant’s brand & style. | App including Findify's brand new Native Shopify Liquid Integration. more Search anything (including content) utilizing NLP, personalization, and more. Full product control with powerful merchandising rules & visual drag & drop. Fully customizable front end. Leverage pre-built components or tailor everything Filters, grid control, promo cards & reviews integrations to inspire shoppers. Active sync ensures all product data (incl. metafields) update within seconds.

4.7(Reviews)

A size recommender for fashion brands to increase conversions, confidence & reduce returns Help shoppers find the right size & fit in under 15 seconds. Fit Quiz gives personalized clothing & footwear recommendations using real fit data, including size, fit, width & length at the product level. No weight questions, body measurements, body scans, size charts, or garment measurements needed. Support unisex sizing & 20 languages, customize the experience to match your brand, & see sales impact and return data in your dashboard. Advanced sizing supports international sizing as you grow. Help shoppers find the right size & fit in under 15 seconds. Fit Quiz gives personalized clothing & footwear recommendations using real fit data, including size, fit, width & length at the product level. No weight questions, body measurements, body scans, size charts, or garment measurements needed. Support unisex sizing & 20 languages, customize the experience to match your brand, & see sales impact and return data in your dashboard. Advanced sizing supports international sizing as you grow. more Fit Beyond Size: Length, width & fit details surfaced right down to SKU level International Sizes: UK, EU, US & custom size formats for apparel brands Clothing & Footwear Ready: Multiple options to customize sizing quiz per product Multilingual: Content & CTA buttons auto-localized across 20 supported languages Performance Reports: Sales lift, return rates & out of stock size data in one

4.1(Reviews)

Reduce returns and improve conversions with AI sizing, fit guides, and built-in email capture. Fitag makes it easy to deliver personalized sizing recommendations for every shopper using AI. The embedded widget helps customers identify their correct fit instantly, reducing sizing uncertainty and increasing purchase confidence. In addition to size chart management and conversion tracking, Fitag also captures shopper details through email opt-in, giving brands a direct way to build their audience and generate new revenue opportunities. Fitag makes it easy to deliver personalized sizing recommendations for every shopper using AI. The embedded widget helps customers identify their correct fit instantly, reducing sizing uncertainty and increasing purchase confidence. In addition to size chart management and conversion tracking, Fitag also captures shopper details through email opt-in, giving brands a direct way to build their audience and generate new revenue opportunities. more AI-powered sizing recommendations for every shopper. Custom size charts by product or collection. Instant widget install via Shopify theme block Mobile-first design built for conversion Collect shopper emails for remarketing and generate revenue

1.0(Reviews)

Add vehicle fitment data to your products. Customers filter by vehicle to find parts that fit. Vehicle parts stores share a common problem: customers struggle to find parts that fit their exact vehicle, which leads to wrong orders and returns. FitmentPro solves this by letting you assign vehicle compatibility data directly to your products. Customers select their car, motorcycle or ATV through a step-by-step filter and immediately see only the parts that fit. They can identify their vehicle by year, make and model, by VIN, or by German HSN and TSN codes. A built-in vehicle database cover Vehicle parts stores share a common problem: customers struggle to find parts that fit their exact vehicle, which leads to wrong orders and returns. FitmentPro solves this by letting you assign vehicle compatibility data directly to your products. Customers select their car, motorcycle or ATV through a step-by-step filter and immediately see only the parts that fit. They can identify their vehicle by year, make and model, by VIN, or by German HSN and TSN codes. A built-in vehicle database cover more Customers find parts that fit their exact car, motorcycle or ATV Built-in vehicle database for the EU, UK, US and Australian markets HSN/TSN/VIN lookup lets customers identify vehicles from registration documents Warns customers at cart and checkout when a part does not fit their vehicle My Garage lets shoppers save their vehicles and shop matching parts

0.0(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.