Compare two images
See exactly which pixels changed between two versions of an image: slider, blend, difference map and key figures.
🔒 Both images stay on this device.
How it works
How it works
- 1
Add what goes in
Drop at least 2 files here (JPG, PNG, WebP, GIF and 2 more formats) — the order you add them is the order they are used in.
- 2
Start it
Set size alignment, tolerance and view, then start. Everything runs in this browser — no upload, no queue, no account.
- 3
Take the result
The PNG is ready the moment the run finishes. Save it straight to your device.
What this tool does
- What goes in
- Reads JPG, PNG, WebP, GIF and 2 more formats. At least 2 files at once.
- What comes out
- You get PNG.
- What happens to quality
- Your file is read, not changed. The original stays exactly as it was.
- Compare two images
- Compares the colour of every pixel after both images are brought to the same size. Transparency counts as white, the tolerance filters compression noise, and the changed area is outlined on the difference map.
When you need this
- A designer delivered a revised banner and you want to spot every changed detail.
- Two screenshots of a web page should show whether a layout bug is really fixed.
Limits and notes
- Which image formats open depends on your browser. HEIC works natively only in Safari; elsewhere convert it first. Very large images are limited by your device's memory. Anything beyond roughly a hundred megapixels can fail on a phone.
Supported formats
Good to know
Frequently asked questions
What if the two images have different sizes?
Choose whether the larger image is scaled to the smaller one or both are aligned at the top left and cropped to the shared area. The tool tells you when the sizes differ.
Why does a re-saved JPG show changes everywhere?
JPEG compression shifts colours slightly. Raise the tolerance until only real edits remain; the largest colour deviation helps you pick a value.
What files can I use here?
Reads JPG, PNG, WebP, GIF and 2 more formats. At least 2 files at once.
What do I get back?
You get PNG.
Does the file lose quality?
Your file is read, not changed. The original stays exactly as it was.
When does it not work?
Which image formats open depends on your browser. HEIC works natively only in Safari; elsewhere convert it first. Very large images are limited by your device's memory. Anything beyond roughly a hundred megapixels can fail on a phone.
Are camera details like location removed?
Yes. The picture is redrawn from its pixels, so EXIF data — camera model, date and GPS position — does not survive the trip. That is a side effect worth knowing before you share a photo.
What about HEIC photos from an iPhone?
They work wherever the tool lists HEIC among its formats, and the result is a JPG, PNG or WebP that every program opens. Some older browsers cannot decode HEIC at all; the tool says so instead of failing quietly.
Private by design
Your files stay on your device
Both images stay on this device.
Other tools
Ready-made