How to Build a Before & After Slider for Your Website in 2026

Want to showcase transformations on your website? Whether it's home renovations, beauty results, photo editing, or product improvements, I'll show you how to build a custom before & after slider in minutes - no coding required.

Before & after sliders let visitors drag to compare two images - it's one of the most engaging ways to show results and transformations.

In this guide, I'll walk you through creating a custom before & after slider using AI. If you're new to building custom widgets, check out our complete guide on how to build custom widgets first.

Why Add Before & After Sliders to Your Website?

Before & after sliders serve powerful purposes:

Show Real Results: Visual proof is more convincing than words
Engage Visitors: Interactive sliding is addictive and fun
Build Trust: Transparent before/after comparisons build credibility
Drive Conversions: Results sell better than promises
Stand Out: Memorable, shareable content that differentiates you

Home contractors show renovations, beauty brands show transformations, photographers show editing skills. Before & after sliders make your results undeniable.

Building Your Custom Before & After Slider with Embeddable AI

Creating a before & after slider with Embeddable's AI is incredibly straightforward. No coding, no complex image handling - just describe what you want and the AI builds it.

Step 1: Start with Your Slider Concept

Before you begin, think about what your slider needs:

Images: Do you have matching before and after photos?
Orientation: Horizontal (left/right) or vertical (top/bottom)?
Labels: "Before" and "After" labels? Custom text?
Interaction: Drag slider? Click to compare? Auto-animate?

For our example, we're building a horizontal before & after slider for a home renovation project.

Step 2: Describe Your Slider to the AI

Open Embeddable and describe your slider in natural language. Here's the exact prompt we'll use:

Build a before and after image comparison slider for home renovation photos. The slider handle should be in the center by default. Add "Before" and "After" labels on each side. Include a subtle animation prompting visitors to drag the slider. Make it responsive for mobile with touch support.

That's it! The AI understands what you want and builds the complete slider with:

Smooth draggable slider handle
Before and After labels
Animated prompt to encourage interaction
Touch-friendly mobile support
Professional styling

Before After Slider Prompt Example

Step 3: Provide Your Website URL for Design Analysis

Here's where the magic happens. Give Embeddable your website URL, and the AI will:

Analyze your brand colors and apply them to the slider
Match your website's fonts for labels
Style the slider handle to feel native
Ensure the comparison slider integrates seamlessly

The result? A before & after slider that looks like it was built by your design team, not a third-party widget.

Before After Slider in Editor

Step 4: Refine Your Slider

Once the AI generates your slider, you can refine it through conversation:

"Add a circular handle with left/right arrows"
"Include a caption area below for context"
"Make the slider vertical instead of horizontal"
"Add multiple before/after pairs in a gallery"
"Include a fullscreen button for detailed viewing"

Each change happens instantly. The preview updates in real-time so you can see exactly how your slider will look and work.

You can also use Embeddable's visual editor to make adjustments yourself - change colors, adjust spacing, modify text, or tweak the layout.

Step 5: Test Your Slider

Before embedding, thoroughly test your slider:

Test Dragging: Ensure smooth slider movement
Try Touch: Test on mobile with finger swipes
Check Images: Verify both images load and align properly
Test Responsiveness: View on desktop, tablet, and mobile
Validate Labels: Ensure text is readable at all sizes

The preview environment shows exactly how your slider will appear on your website, so you can catch any issues before going live.

Embedding Your Slider on Any Website

Your custom before & after slider works everywhere. Once you're happy with it, you'll get a simple embed code that works on:

WordPress: Paste into any page or post
Shopify: Add to product pages or landing pages
Wix / Squarespace: Embed in any section
Custom websites: Add to any HTML page

The process is the same everywhere:

Get Your Embed Code: Click "Publish" and copy the code snippet
Paste Into Your Website: Add where you want the slider to appear
Publish Your Page: The slider goes live immediately

Your slider automatically:

Responds to drag and touch interactions
Adapts to different screen sizes (mobile, tablet, desktop)
Loads images efficiently
Works with all major browsers
Updates instantly if you make changes

Types of Before & After Sliders You Can Build

The same process works for any comparison:

Home & Renovation

Room remodels
Exterior transformations
Landscaping projects
Cleaning results

Beauty & Wellness

Cosmetic procedures
Fitness transformations
Skincare results
Hair styling

Photography & Design

Photo editing
Retouching work
Design revisions
Website redesigns

Automotive

Car detailing
Restoration projects
Collision repair
Custom modifications

Product Comparisons

Product versions
Feature updates
Quality improvements

Start with a Template or Build from Scratch

Not sure where to start? Embeddable offers free before & after slider templates you can customize:

Horizontal Slider - Classic left/right comparison
Vertical Slider - Top/bottom reveal
Circle Reveal - Expanding circle effect
Gallery Slider - Multiple before/after pairs
Hover Reveal - Mouse hover comparison

Choose a template that's close to what you need, then customize it with AI to match your exact requirements. It's the fastest way to get a professional comparison slider on your site.

Why Before & After Sliders Convert

Before & after sliders are conversion machines for several reasons:

They're Visual Proof: Seeing is believing - transformations speak louder than words.

They're Interactive: Visitors control the reveal, creating engagement and investment.

They're Memorable: Interactive comparison is more impactful than side-by-side photos.

They Build Trust: Transparent results show you deliver on promises.

They're Shareable: Impressive transformations get shared on social media.

Making Your Slider More Powerful

Take your slider to the next level with these additions:

Caption Details

Add context about what changed, how long it took, or what services were used.

Multiple Comparisons

Create a gallery of before/after pairs to showcase multiple projects.

Zoom Feature

Allow visitors to zoom in for detailed inspection.

CTA Integration

Add "Get Your Transformation" or "Contact Us" buttons below the slider.

Testimonials

Include client quotes alongside their transformation photos.

Embeddable supports integrations to connect your slider with galleries, forms, and analytics.

Image Tips for Best Results

For the most impactful sliders:

Same Angle: Shoot before and after from the exact same position
Same Lighting: Consistent lighting makes comparisons fair
Same Dimensions: Images should be the same size and aspect ratio
High Quality: Use high-resolution images for professional appearance
Clear Difference: Choose examples with obvious, impressive changes

Ready to Build Your Before & After Slider?

That's it! No developers, no complex image handling, no design skills needed. Just describe what you want and AI builds your custom comparison slider in minutes.

Your slider will:

Match your website's design perfectly
Work smoothly on desktop and mobile
Showcase your transformations impressively
Engage visitors with interactive comparison
Update easily when you add new examples

Ready to get started?

Option 1: Start with a Template Browse free before & after slider templates and customize one to your needs.

Option 2: Build Custom with AI Head to Embeddable and describe your slider - the AI will build it in minutes.

Need More Widget Ideas?

More Tutorials:

Start showcasing your transformations with custom before & after sliders now!