Upload a before photo and an after photo. Get a clean side-by-side composite for social posts, plus an interactive drag-to-compare slider you can embed on your website. Free, no watermark, nothing leaves your browser.
Heads up: this snippet points to two image URLs, not the photos themselves (embedding full images would make the code huge). Host your before and after photos on your own website or CDN, then paste the links below. The slider code updates automatically.
We build interactive before/after galleries right into your website so every project sells the next one. Get a free mockup or audit.
Get a free mockup or audit →Nothing closes a deal faster than seeing the change with your own eyes. This tool takes two photos and gives you two things at once: a clean side-by-side composite PNG for social posts and your Google Business Profile, and an interactive drag-to-compare slider you can drop on your website. No watermark, no signup, and your photos never leave your browser.
Upload your before photo and your after photo. The live preview lets you drag a handle to wipe between them, exactly how it will feel to a visitor on your site. From there you get two outputs. The composite PNG renders both shots side by side (or stacked) with clear BEFORE and AFTER labels, sized for social. The slider code is a self-contained HTML, CSS, and JavaScript snippet that references two image URLs you host yourself, so the embed stays tiny and fast.
Canva can build a comparison by hand, but a clean, watermark-free export usually means paying for Canva Pro (around $15/month), and it does not give you an interactive slider for your site. Premium WordPress before/after slider plugins charge a yearly license and lock you into one platform. This tool is purpose-built for trades and contractors, it is free, there is no watermark, and you get both the social composite and the embeddable slider from the same two photos.
The most persuasive before/after photos are also the most truthful ones. Shoot both frames from the same spot, the same distance, and the same time of day so the only thing that changed is the work. Skip heavy filters. An honest comparison builds trust, and trust is what turns a scroll into a phone call.
The Pro version builds interactive before/after galleries into your website with auto-optimized images and unlimited projects.
Get early access, book a free call →Upload a before photo and an after photo. Everything runs in your browser: the two images are read and combined on your own device, and nothing is sent to a server. As soon as both are in, a live preview lets you drag a handle to wipe between them, exactly how the comparison will feel to a visitor on your site.
From those two photos the tool builds two separate outputs. The composite PNG is drawn on an HTML canvas: each photo is center-cropped to fill its panel, placed side by side or stacked, and labeled BEFORE and AFTER, sized for social posts and your Google Business Profile. The slider code is a self-contained snippet of HTML, CSS, and JavaScript that points to two image URLs, so the embed stays small and fast instead of carrying full-resolution photos inside the page.
Here is what it does not do. It will not host your images for the embed: you upload the before and after photos to your own site or CDN and paste the two links into the snippet. It does not judge whether the work looks good, and it cannot check that a comparison is honest. That part is on you. Shoot both frames from the same spot, distance, and light so the only thing that changed is the work. If you want a gallery of these built directly into your site, that is the kind of thing we do under custom tools.
No. There is no watermark, no signup, and no account. Both the composite PNG and the slider code come out clean and are yours to use. It is one of more than 50 free tools we publish at kellywm.com/tools, with no email wall.
Two photos with the same shape, both landscape or both square, line up the cleanest. The tool center-crops each one to fill its panel, so matching shapes avoid awkward cropping. Keep the angle, distance, and lighting the same in both shots so the change reads as real.