How to use Image Comparison
Compare two images side-by-side, with overlay blending, split view, or pixel-level difference analysis. Perfect for before/after comparisons.
Credit Usage
Options & Settings
| Setting | Type | Description |
|---|---|---|
| Comparison Mode | Buttons | Choose how to compare images. Side by SideOverlaySplitDifference |
| Opacity | Slider 0-100% | In Overlay mode, adjust transparency of the top image. |
| Split Direction | Toggle | In Split mode, choose vertical or horizontal split. VerticalHorizontal |
| Split Position | Drag | Drag the split line to reveal more of either image. |
| Sensitivity | Slider 1-50 | In Difference mode, the threshold for what counts as a changed pixel. The result shows the share of pixels that differ and an SSIM similarity score. |
| Zoom | Buttons | Zoom from 25% to 300% with the buttons or the scroll wheel. 25-300% |
| Swap Images | Button | Exchanges Image A (Before) and Image B (After). |
| Download | Button | Saves the current comparison as an image. |
When to Use
- Before/after comparisons of AI processing results
- Quality checking upscaled vs original images
- Detecting subtle changes between design revisions
- Client presentations showing processing improvements
Pro Tips
Difference mode highlights even tiny changes. Perfect for catching unwanted artifacts.
The interactive split slider is ideal for showing clients before/after results.
Download in Difference mode to save the difference image for QA records.
Open it straight after another tool: the original and the result load as Image A and Image B on their own.
How do I…
How do I compare a before and after?
Load the two images and choose Side by Side, Overlay, Split or Difference. Opened straight after another tool, the original and the result load as Image A and Image B on their own.
How do I find small changes between two versions?
Use Difference mode. Sensitivity sets what counts as a changed pixel, and you see the share of pixels that differ with a similarity score.
How do I save the comparison?
Click Download to save the current comparison as an image. In Difference mode it saves the difference image.
What to Expect
Best Results
- Same-dimension images (or similar ratio)
- Before/after of same design
- High-quality source files
- Similar image content for meaningful diff
Limited Results
- Very different image sizes
- Completely unrelated images
- Heavy compression artifacts
- Large images (slower to process)
Real-World Examples
Upscale Quality Check
After using AI Image Upscaler to upscale a pattern 4x, the designer wants to verify detail quality. Original: 1000x1000px source, visible pixelation at 100%. Upscaled (Split mode): 4000x4000px result, drag to compare detail. Settings: Split mode, Vertical, Zoom: 200%.
Revision Comparison
A client asked for subtle color changes. The designer needs to document exactly what changed. Version 1: Original color palette, full saturation blues. Version 2 (Difference): Color changes highlighted, shows exactly what shifted. Settings: Difference mode. Result: 12.3% pixels different (color areas).
Ready to try Image Comparison?
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