Add a watermark to your photos
Drop a batch of photos and stamp each one with a text mark or your own logo image, one corner or tiled across the whole frame, at whatever opacity keeps the photo underneath visible. Nothing leaves your browser to do it.
Want the best result? Read How to watermark your photos.
Two ways to mark a photo
Text mode reuses the same outlined-caption engine as this site's caption tool, so a short credit line stays legible over any background. Logo image mode is for a real mark, upload your own logo once and it's stamped onto every photo in the batch at a chosen corner, or tiled in a repeating grid across the whole frame if you want something harder to crop out.
Switching between the two doesn't lose your other settings, position and opacity carry over whichever mode you're using.
Opacity is the difference between a watermark and a caption
A caption tool draws text at full strength because the point is to be read clearly. A watermark usually wants to sit underneath that, visible enough to make a re-share or a screenshot obviously yours, without fighting the photo for attention. The opacity slider runs from faint to solid, so a logo can sit quietly in a corner or announce itself across the whole frame, your call.
Tiling covers more of the frame on purpose
A single logo in one corner is easy to crop out of a re-share. Tiling repeats it in a grid across the entire photo instead, at a size and gap that scale with the logo you uploaded, so cropping the mark out means cropping out most of the photo too.
Nothing is uploaded
Your photos and your logo are both decoded in your browser tab, composited onto a canvas, and encoded back into a downloadable file. Neither one is sent anywhere. Disconnect from the internet after this page loads and it still works.
What this is not
This stamps a mark onto pixels you can see, it doesn't hide anything invisibly and it isn't a licensing or copyright registration. Treat it as a visible deterrent and a credit line, the same as any watermark, not as proof of ownership on its own.
Quick questions
Can I use my own logo?
Yes. Choose an image file as the logo and it's stamped onto every photo you drop, at the position, size and opacity you set.
What's the difference between text and logo mode?
Text mode draws an outlined line of text, the same engine the caption tool uses. Logo mode composites an image you upload instead. Only one mode applies per batch.
What does tiling do?
Instead of stamping the logo once in a corner, tiling repeats it across the whole photo in a grid, which makes the mark much harder to crop out.
Can I make the watermark subtle?
Yes, the opacity slider goes from faint to fully solid. A lower setting keeps the photo underneath clearly visible.
Is my photo or my logo uploaded anywhere?
No. Both are processed entirely in your browser. Disconnect from the internet after the page loads and it still works.
Can I watermark several photos at once?
Yes, up to 200 per batch. The same mode, position, size and opacity apply to every photo.
Does this protect my copyright?
It's a visible deterrent and a credit line, not a legal registration. Treat it the same way you'd treat any visible watermark.
Converters
Start here if your files still need converting before you use this tool.