βοΈ Image Comparison Slider
Before/after drag slider. Upload two images, drag the divider, wow your audience.
Show Transformations With a Drag Slider
Nothing sells a transformation like letting people wipe between before and after themselves. This tool builds the classic interactive comparison slider: two photos stacked, a draggable divider, and labels. Upload your before and after shots, drag the handle to reveal the change, and watch the difference land harder than any side-by-side ever could. The interaction makes viewers feel they discovered the improvement, which is far more persuasive than being told about it.
Getting the Best Comparison
The slider is only as good as the photo pair. Shoot both from the same position, height, and zoom: even small framing differences make the wipe look broken as features jump sideways. Use the same lighting direction when possible; a before shot at noon and an after at sunset will read as a lighting change rather than your actual work. Keep both images the same dimensions. The tool scales to match, but starting aligned saves quality. Portrait orientation suits faces and rooms; landscape suits exteriors and wide edits.
Who Uses Before/After Sliders
Photo retouchers prove their skill without a word. Contractors and remodelers turn kitchen and bathroom renovations into portfolio pieces that win bids. Auto detailers show paint correction dramatically. Dentists, dermatologists, and med spas document treatments (with patient consent). Designers present website and logo redesigns. Fitness coaches show progress. In every case, the slider format outperforms static pairs because the viewer controls the comparison moment.
Sharing Your Comparison
The interactive slider lives on this page while you are here. To share it, you have options: screenshot the slider at an interesting divider position for social posts, or download the side-by-side composite the tool generates, which places before and after next to each other with labels in a single image file. The composite works everywhere images work: listings, emails, portfolios, and print. For your own website, the interaction pattern is simple enough that any developer can rebuild it, and this page serves as a working reference.
Honesty in Comparisons
Comparison sliders carry trust because they feel transparent, so keep them honest. Do not enhance the after beyond the actual work, do not worsen the before artificially, and disclose when lighting or angles differ. For regulated fields like medicine and dentistry, follow your industry advertising rules about before/after imagery. An honest slider builds a reputation; a manipulated one destroys it the moment someone notices.
Frequently Asked Questions
How do I make a before/after image slider?
Upload your "before" image and your "after" image. The tool stacks them with a draggable divider: drag left and right to wipe between the two states. Add optional labels, then share by screenshot or by downloading the side-by-side composite. It is the most convincing way to show edits, renovations, and restorations.
Do the two images need to be the same size?
They should be the same dimensions and, ideally, the same framing for the slider to look right. If they differ, the tool scales both to match the first image while preserving aspect ratio. For the most striking comparisons, shoot before and after from the same spot with the same framing; even a slight angle change weakens the effect.
What is a comparison slider good for?
Photo editors showing retouching work, contractors showing renovations, dentists and clinics showing treatments, detailers showing car transformations, and designers showing redesigns. Anywhere the change is the story, an interactive slider beats two separate photos because viewers control the reveal themselves, which makes the difference feel discovered rather than claimed.
Can I embed the slider on my website?
The slider itself is interactive on this page. To use it on your site, take a screenshot-style approach: position the divider mid-way, screenshot it, or download the side-by-side composite the tool generates. For a live embedded slider, the pattern is simple (two stacked images with a clip-path driven by an input range), and any web developer can recreate it from this page as a reference.
Why does my slider look misaligned?
The two photos were taken from different positions or cropped differently. The tool aligns by scaling, not by content, so it cannot fix parallax or rotation differences. Re-shoot with a tripod mindset: same spot, same height, same zoom. Phone cameras make this easy with their grid overlay; line up a fixed reference point in both shots.
Are my images uploaded anywhere?
No. The comparison renders entirely in your browser, so your before and after photos never leave your device. Both images are drawn to local canvases and the draggable divider is handled with plain JavaScript. That matters for client work, medical imagery, and real estate photos you cannot share externally. Nothing is transmitted to any server or stored remotely. Closing the tab wipes everything from memory, so your visual comparisons stay completely private.