Image Comparison
FreeCompare two images side by side with a slider
Upload both images to compare them side-by-side with a draggable slider.
About Image Comparison
When you tweak a compression setting, swap an asset, or land a CSS change, the difference can be hard to spot by flicking between two tabs. Image Comparison puts both versions in one frame with a draggable slider, so you can sweep across the seam and instantly see exactly what changed pixel for pixel.
Upload two images and the tool overlays them with an interactive divider you drag left and right to reveal each side. It's ideal for before-and-after checks where subtle differences matter. Everything happens in your browser, free and without a signup, so the images you're comparing stay on your machine and the slider responds instantly as you move it.
Common uses
- Comparing original versus compressed images to judge quality loss before shipping
- Reviewing before-and-after states of a design retouch or color grade
- Spotting subtle visual regressions between two screenshots of the same UI
- Demonstrating the impact of an upscale or background-removal step to a teammate
- Validating that an asset swap didn't shift framing or cropping unexpectedly
How to use
- 1
Upload your file
Click the upload area or drag & drop your file. Supports *. Up to 50 MB.
- 2
Click "Process — Image Comparison"
Click the process button. Your file is converted instantly on our secure servers.
- 3
Download your result
Preview and download your converted file. No watermarks, no quality loss, no expiry.
Why ToolHub?
- Web-optimized images
- No quality loss
- Browser-based processing
FAQ
Do both images need to be the same size?
For a clean slider effect they should share the same dimensions. Mismatched sizes still load but the overlay won't line up precisely.
Does it tell me which pixels differ?
No. It's a visual side-by-side slider for your own eye to judge, not an automated pixel-diff report.
Can I export the comparison as one image?
The tool is built for interactive on-screen comparison via the slider rather than exporting a combined static file.
Can I use Image Comparison on mobile?
Yes — ToolHub is fully responsive and works on iPhone, Android, tablets and all modern browsers. No app install needed.