Your files never leave your device. All processing happens in your browser.
Open the Img Stop Compare Images tool, upload the two versions and choose a view: differences highlighted in red, side by side, slider, blink/flicker or difference map. Adjust the sensitivity, see the percentage of pixels that changed, and download the difference image.
About the Compare Two Images
The Img Stop Compare Images tool shows exactly what changed between two versions of a picture. Changed pixels are highlighted in red, or you can switch to a side-by-side view, a slider that wipes from one image to the other, a blink/flicker view that alternates them, or a difference map.
A sensitivity control ignores tiny changes such as compression noise, and the tool tells you what percentage of pixels changed. It is handy for checking design revisions, website screenshots, edited photos and spot-the-difference puzzles – and both images stay in your browser.
Key features
- Red difference highlightChanged pixels are marked in red over the image.
- Side by side and sliderView both images together or wipe between them.
- Blink / flickerAlternate the images so changes jump out.
- Difference mapSee only what changed.
- Sensitivity and % changedIgnore tiny noise and see how many pixels changed.
- Download the resultSave the difference image.
How to use the Compare Two Images
- Upload two images Add the original and the new version.
- Choose a view Highlight, side by side, slider, blink or difference map.
- Adjust sensitivity Raise it to ignore tiny compression changes.
- Download Save the difference image if you need it.
Compare Two Images at a glance
| Price | Free, no watermark |
|---|---|
| Views | Red highlight, side by side, slider, blink, difference map |
| Controls | Sensitivity |
| Statistics | Percentage of pixels changed |
| Output | Downloadable difference image |
| Processing | In your browser – photos are not uploaded |
When to use it
- Check what a designer changed between two versions of a logo or layout.
- Compare website screenshots before and after an update.
- See how much a photo was edited or retouched.
- Solve spot-the-difference puzzles.
- Check how much quality is lost after compressing an image.
Tips for the best result
- Results are clearest when both images have the same size and framing.
- Use blink view for small changes that are hard to see side by side.
- Raise sensitivity when comparing JPGs to ignore compression noise.
- Use the % changed figure to compare different compression settings.
Frequently asked questions
How can I compare two images for differences?
Upload both to the Img Stop Compare Images tool. Differences are highlighted in red, and you can switch to side by side, slider, blink or difference map views.
Can it tell me how different two images are?
Yes. It shows the percentage of pixels that changed, based on the sensitivity you choose.
Why does it show differences everywhere on JPG files?
JPG compression changes pixels slightly. Raise the sensitivity so these tiny changes are ignored and only real edits are shown.
Can I save the comparison?
Yes. Download the difference image to share or keep.
Are my images uploaded?
No. The comparison runs in your browser.
Learn more
- MDN: Image file types – common image formats explained
Made and maintained by the Img Stop team.