To add a before and after image slider in WordPress, install the free SlideVerse plugin, insert the Before After Image Comparison block and choose the two images. Visitors drag the divider to reveal the change. Use identical framing and dimensions so the comparison is honest; vertical comparisons are part of SlideVerse Pro.
Why it works
A before/after slider lets visitors check the result for themselves. Dragging the divider is more convincing — and more memorable — than two photos side by side.
Prepare the images
| Rule | Why |
|---|---|
| Same dimensions | The divider lines up exactly |
| Same camera position and angle | Visitors compare the change, not the framing |
| Same lighting where you can | Otherwise the "after" looks better just because it's brighter |
| Unedited "before" | An honest baseline builds trust |
| Alt text on both | Describe each state: "Kitchen before renovation" |
Add the block
- Install and activate SlideVerse.
- Insert Before After Image Comparison.
- Choose the before and after images.
- Adjust the settings in the sidebar and the look in the Style tab.
- Add a heading and a one-line caption explaining what changed.
- Publish and test on a phone.
Use cases
- Renovation and interior design — rooms, kitchens, facades.
- Landscaping — gardens and outdoor spaces.
- Photo editing and retouching — portfolios.
- Cleaning, detailing and restoration — cars, carpets, furniture.
- Dental and cosmetic clinics — with patient consent.
- Website redesigns — old site vs new.
Show several comparisons on one page by adding one block per project, or put them inside a Flexi Content Slider so visitors swipe between projects.
Free vs Pro vs alternatives
| SlideVerse (free) | SlideVerse Pro | GutSlider (free / Pro) | |
|---|---|---|---|
| Left/right image comparison | Yes | Yes | Yes |
| Top/bottom (vertical) comparison | — | Yes | — |
| Drag, fade or toggle modes | Drag | Drag | Yes |
| Several designs | — | — | Yes, more in Pro |
| Video comparison | — | — | Pro |
| Eight other slider types in the same plugin | Yes | Yes | Four other blocks free |
Source: GutSlider, as of October 25, 2026. Disclosure: WPXERO makes SlideVerse (version 0.2.2).
SlideVerse Pro starts at $19.99 a year and also adds a lightbox, 3D transitions, a WooCommerce Product Slider and templates.
More SlideVerse guides: an image slider, a post carousel and a testimonial slider. See all options in our block editor slider round-up.