How to add a reviews slider to any Shopify theme

Introduction

Build trust and credibility with the Flexi Reviews Slider — a dynamic section designed to showcase customer reviews in a smooth, scrollable format. Instead of hiding reviews deep on product pages, a reviews slider lets you highlight social proof exactly where it matters most.

In the video above, you’ll learn how to add a reviews slider to any Shopify theme using Flexi’s intuitive block-based system. Discover how to display testimonials, control slider behavior, and create a mobile-friendly experience that reassures customers and drives conversions.

Perfect for homepages, product pages, and landing pages, the Flexi Reviews Slider integrates seamlessly with any Shopify theme. Whether you’re highlighting written testimonials, star ratings, or customer quotes, this section helps turn feedback into confidence.

Setup Instructions

Install the App

Visit the Shopify App Store and install Flexi Slider Sections. Start your free trial to unlock access to all Flexi sections, including the Reviews Slider.

Install Section

Open the Flexi app and navigate to the sections library. Search for "Reviews Slider" and click "Add to Theme" to install it instantly.

Add to Your Store

Go to your Shopify admin → Online Store → Themes → Customize. Navigate to the page where you want to display reviews, click "Add section", and select "Reviews Slider" from the available sections.

Set Section Width

In the section settings, choose how the reviews slider should be displayed:

• Full width: Create an immersive, edge-to-edge testimonial experience
• Fixed width: Set a custom maximum width (320px – 1440px)
• Theme width: Match your theme’s default content container

Add Content

Click "Add block" to add individual reviews. Each block can include a customer name, star rating, review text, and optional product reference or avatar image.

You can add as many reviews as you like and reorder them easily using Shopify’s drag-and-drop editor, allowing you to surface your strongest testimonials first.

Customize & Style

Customize your reviews slider using Flexi’s built-in settings:

• Control slides per view on desktop and mobile
• Enable or disable arrows, pagination, and auto-play
• Adjust spacing, alignment, and card layout
• Customize star styles, typography, and colors

Works Seamlessly with Dawn & Horizon

Flexi sections are built for Shopify’s modern theme architecture, which means the Reviews Slider works seamlessly with Dawn, Horizon, and all Online Store 2.0 themes.

Dawn Compatibility

Dawn is Shopify’s reference theme, and the Flexi Reviews Slider follows the same responsive spacing patterns and accessibility best practices used throughout Dawn.

This ensures reviews inherit your theme’s typography and color system by default, while still allowing full visual control through Flexi’s customization options.

Horizon & Modern Framework Support

Horizon represents Shopify’s next-generation theme framework. The Reviews Slider integrates cleanly with Horizon-based themes without overriding global styles or introducing JavaScript conflicts.

Because each Flexi section is self-contained and theme-safe, you can confidently add reviews sliders to modern and highly customized storefronts.

Theme-Safe by Design

Every Flexi section is scoped, isolated, and performance-optimized. This means you can:

• Add or remove review sliders without editing theme code
• Preview testimonial changes safely before publishing
• Reuse the same reviews slider across pages and themes
• Switch themes without rebuilding social proof layouts

Whether you're using Dawn, Horizon, or a fully custom Online Store 2.0 theme, Flexi’s Reviews Slider adapts automatically — helping you showcase customer feedback in a clear, engaging, and conversion-focused way.