Drop to checkJPEG or PNG
Drop an image hereChoose an imageor , or paste a screenshot Ctrl V
JPEG or PNG. Everything is checked on your device; the image is never uploaded.
Reading the seal
On the sealed photo
In this copyNot in this copyDid not match its registered measurement
Full tamper reportEvery measurement: the seal block by block, the detail fingerprint, colour and brightness per area, geometry
Sealed photos
Start with one of ours
Each photo carries an invisible seal and is registered. Click one to check it as it is, or download it and change it however you like.
The registry keeps no copy of these photos: only keyed labels of their keys and measurements that cannot rebuild an image.
An early proof of concept. It shows the idea and the architecture working, but it is not perfect yet: results vary with the content of each image, and some copies may not read. Found one that fails? Send us the image and we will look into it.