How to watermark an image
Drop your images into the box above, or click Choose files. JPG, PNG, WebP and iPhone photos work, many at once.
Choose your logo (a PNG with a transparent background works best), or switch to Text and type something like your name or "Only for XYZ Bank".
Choose diagonal, tiled or corner, a colour (white suits photos) and how strong it is.
Click Add watermark and download the images one by one or as a ZIP.
Why watermark an image?
Copies of IDs, passports and payslips get sent to landlords, shops and banks. A line saying who it's for and when makes a leaked copy far less useful to anyone else.
Photographers and sellers sign their photos so that when a picture is shared further, people can still see where it came from.
Diagonal, tiled or corner?
Tiled repeats the text over the whole image, so no part can be cropped out without it: the right choice for ID and document copies.
Diagonal puts it once, large, across the middle; corner puts it small in the lower right, like a signature, and keeps the photo clear.
Is it safe?
Yes. Watermark Image runs entirely in your browser. Your files are read and converted by your own device using built-in browser technology, so they are never uploaded to a server and nobody else can see them.
You can check this yourself: open your browser's developer tools, switch to the Network tab and convert a file. No upload requests are made.
Images are watermarked in your browser and never uploaded, so ID copies stay on your device.
Files stay in this tab's memory only until you remove them or close the page.
Frequently Asked Questions
Should I watermark a copy of my ID?
It's a good idea. Write who it's for and the date, like "Only for XYZ Bank, 2026", and choose Tiled so it covers the whole image.
Can I watermark many photos at once?
Yes. Every image gets the same watermark, and you can download them all as a ZIP.
Which colour should I use?
White with a soft shadow reads well on most photos; grey or red suits scans and documents on white paper.
Does the image lose quality?
The picture is saved again with the watermark at high quality, in its own format; HEIC photos become JPG. Its size in pixels stays the same.
Can the watermark be removed?
It's drawn into the pixels, so it's much harder to take off than one in a PDF. A tiled watermark is the hardest to remove or crop away.