What changes in the file.
Visible pixels and hidden file data are different things. Privacy work often means checking both what people can see and what the file still carries with it.
Image & Photo · Protect
Add a tiny ownership mark.
Put a small, low-visibility mark on a photo so attribution can survive casual reposting. Nothing is uploaded.
1 Choose2 Format3 Watermark4 Download
Useful to know
Four things worth knowing.
Where it stops.
Blur can leave information recognisable, and removing metadata does not hide text, faces, notifications or locations visible inside the image itself.
What to inspect.
Open the finished image at normal size and check crop, sharpness, dimensions and file size.
Worth knowing.
Make a separate sharing copy. Keep the untouched original somewhere private instead of overwriting it.