Guides/before after image comparison widget

Before After Image Comparison Widget for Website: A Premium Before/After Slider

Use a before/after image comparison widget to show transformations: orientation, focal point alignment, handle styling, and a CLS-safe embed.

When to use a before/after image comparison widget

A before/after slider is ideal when you need visual proof:

  • Renovations and transformations
  • Photo edits and retouching
  • Design revisions (UI/UX, branding)

The key is a stable layout (no CLS) and a handle that feels good on touch.

Build it in GizmoSauce

Start here: /widgets/before-after

Open the editor: /get-widget/before-after

Upload/select your images, set aspect ratio, then embed it with Save & Get Code.

Widget editor wireframe

Image fit + focal point (why your slider may look wrong)

Most issues come from cropping.

  • Use cover for the best premium look.
  • If the subject is cut off, tune Image Position (X/Y) independently for Before and After.

This keeps the comparison meaningful without re-editing source images.

Use cases beyond renovations

Image comparison isn’t just for construction or makeovers.

Common use cases:

  • Product customization (colorways, finishes, variants)
  • UI redesigns (before/after screens)
  • Photo retouching (raw vs edited)

If your audience needs a fast “what changed?” moment, a before/after widget is a high-trust pattern.

Interaction + accessibility

Use Drag when you want a clear “grab the handle” interaction.

Use Hover compare when you want a lightweight desktop-only feel.

Make sure keyboard users can still use the slider (arrow keys/home/end).

Competitor check: what usually goes wrong

Before/after sliders are deceptively easy to ship—and many implementations miss key details.

Common issues in generic plugins:

  • No reserved height (CLS when images load)
  • Weak mobile/touch handling
  • No keyboard support
  • Styling that fights the site theme

If you’re comparing tools, prioritize CLS safety, touch UX, and accessibility—not just “it drags.”

FAQ

What aspect ratio should I use?

Pick an aspect ratio that matches your images and page layout (16:9 is a safe default). Consistent ratios prevent layout shift.

Can I change label and handle styling?

Yes. The Design tab includes presets plus fine-tuning for label colors/typography and handle colors/radius/shadows.

Does it work on mobile?

Yes—use drag interaction and ensure the widget has enough height for comfortable touch input.