Compare Two Images Online
Controls
Upload exactly two images, compare them with slider, side by side, difference, or overlay mode, switch between horizontal and vertical layouts, swap image order, and download the current comparison view. No registration is required.
How to Compare Two Images
- Click "Select 2 Images" and choose exactly two photos
- Use the slider to reveal each image
- Switch between Slider, Side by Side, Difference, or Overlay modes
- Toggle between horizontal and vertical orientation
- Use "Swap" to switch image order
- Download the current comparison as PNG
Key Features
Slider Mode
Drag a divider across the images to reveal one or the other.
Side by Side Mode
View both images next to each other at full size.
Difference Mode
Highlight pixel-level differences to spot changes between images.
Overlay Mode
Blend both images to check alignment and transparency differences.
Flexible Layout
Swap image order and change orientation to review the comparison the way you want.
Save the Active View
Export the current comparison view as an image.
Frequently Asked Questions
Comparing two images means viewing them together in a way that makes differences, edits, alignment changes, or visual improvements easier to see. It is commonly used for before-and-after checks, design revisions, retouch comparisons, screenshot review, product photo updates, and spotting subtle changes between two similar files.
If the two images have different dimensions, Slider, Difference, and Overlay modes scale both images to the same larger canvas size so they can be compared directly. In Side by Side mode, each image keeps its own original size and is displayed next to the other with spacing between them.
Difference mode compares the pixels in both images and highlights changed areas so visual differences are easier to spot. In this tool, changed regions are emphasized in red while similar areas are shown in a muted grayscale style for clearer review.
No. Everything runs locally in your browser, so your images never leave your device while you compare or export the view. The tool does not upload either file to a remote server for analysis or storage.
No. This tool is designed to compare exactly two images at a time so the visual relationship stays clear and easy to interpret. If you need to review more than two files, compare them in pairs for the most consistent results.