Do I need coding skills to use this tool?

No. The tool generates the complete HTML, CSS and JavaScript for you. You only paste the snippet into your page, which makes it usable in plain HTML sites as well as WordPress, Webflow and other builders that accept custom code.

Is the generated slider responsive and touch friendly?

Yes. The generated code scales images with width:100% and supports both mouse and touch dragging, so the before/after slider works on desktops, tablets and mobile phones without any extra configuration.

Are my images uploaded to a server?

No. The comparison slider is built entirely in your browser using the FileReader API. Your images never leave your device, so sensitive client work and private photos stay private.

Can I use the slider for SEO and marketing pages?

Yes. Before/after sliders are common on service and portfolio pages because they demonstrate results visually. Add descriptive alt text to both images and keep the surrounding copy specific to the service to keep the page accessible and search friendly.

Image Comparison Slider – Generate Before/After Slider

Q: What is an image comparison slider?

An image comparison slider is a UI element that overlays two images so visitors can drag a divider to reveal the before and after versions. It is widely used for photo retouching portfolios, product shots, cosmetic results and design revisions.

Upload two images, drag the divider, and copy a responsive before/after slider snippet — 100% free and private.

Drop your before & after images here

or browse files — two images needed

2 images JPG, PNG, WebP 100% private Max 45MB each

Live Comparison Preview

before.jpg after.jpg

BEFORE AFTER

Drag the handle left and right to compare. Images stay in your browser.

Divider Style

Divider color

3px

Labels

Show before/after labels

Starting Position

50%

Copied!

Generated Code

What Is an Image Comparison Slider?

An image comparison slider is an interactive element that stacks two images on top of each other and lets visitors drag a vertical divider to reveal the "before" and "after" states. Instead of placing two photos side by side, the slider keeps both versions perfectly aligned, which makes small changes far easier to see.

This before after slider generator builds the comparison for you. Upload the original and the edited image, adjust the divider style and label text, then copy production-ready HTML, CSS, and JavaScript. The output is lightweight, dependency-free, and works in any modern browser.

Because processing happens entirely in your browser with the FileReader API, your images never touch a server. That makes the tool safe for client work, private photos, and unreleased product shots.

Key Features

Live Drag Preview

Move the divider in real time to check the exact crop before you copy any code.

Custom Divider

Change the divider color and thickness so the slider matches your brand styling.

Editable Labels

Rename the "BEFORE" and "AFTER" badges or hide them completely for a cleaner look.

Responsive & Touch Ready

The generated slider uses fluid widths and pointer events so it works on phones and tablets.

Clean Output

Copy separate HTML, CSS and JS tabs, or grab the full snippet with one click.

100% Private

No uploads, no accounts, no watermarks. Everything runs locally in your browser.

How to Use the Before/After Slider Generator

Upload both images

Drop the original and the edited image onto the upload area, or click browse to pick them. Use the same dimensions for perfect alignment.

Preview and adjust

Drag the handle to compare. Then set the divider color, thickness, label text and starting position in the sidebar.

Copy the code

Switch between the HTML, CSS and JS tabs to inspect the output, then copy the full snippet into your project.

Paste into your site

The markup works in plain HTML pages and in builders that accept custom code, including WordPress and Webflow.

Best Practices for Before/After Sliders

To get the most from an image comparison slider, follow these practical guidelines:

Match image dimensions. Both files should share the same aspect ratio. If the source images differ, crop them first with the Image Resizer so the divider stays aligned.
Use descriptive alt text. Write alt text that states what changed, for example "portrait retouched: skin smoothing and color correction". This helps screen readers and image search.
Keep file sizes small. Compress the images with the Image Compressor and serve WebP where possible. Large pairs slow down mobile pages.
Add context around the slider. A short paragraph explaining the process ranks better than a slider with no supporting copy. Learn why in the Google image SEO guidelines.
Test on touch devices. Confirm the handle responds to swipe gestures on a real phone before publishing.

Related Image Tools

Pair the comparison slider with other free tools on ImageFix:

Bulk JPG to PNG Converter — switch formats without losing quality before you compare.
Focal Point Picker — generate CSS object-position values so images crop correctly inside the slider frame.
Image Resizer — align both images to identical dimensions.
Image Compressor — reduce file weight for faster loading pages.

Frequently Asked Questions

It is a UI element that overlays two images and lets visitors drag a divider to reveal the before and after versions. Photographers, retouchers and product marketers use it to show edits clearly.

No. The tool writes the HTML, CSS and JavaScript for you. Paste the snippet into your page and the slider works immediately.

Yes. Images scale with their container and the handle uses pointer events, so it works with mouse and touch on all modern devices.

No. Everything runs in your browser. Files are read locally and never transmitted, so private client work stays private.

Yes. Paste the HTML into a custom HTML block and add the CSS and JS in the appropriate custom code fields. Any builder that accepts raw code works.

JPG, PNG, WebP and other formats your browser can decode. For best results use two files with the same dimensions and aspect ratio.