Are my photos uploaded to a server?

No. Every file is decoded with the browser's own image pipeline and stamped on a canvas in a tab on your computer. There is no upload, no temporary copy on our side, and nothing to delete afterwards. Once the page has loaded you can switch off your connection and the tool still exports files.

Can I watermark several photos at once?

Yes. Select as many images as you like — the same text or logo, position, size, opacity and rotation are applied to all of them. Because the size is expressed as a percentage of each image's width, the mark keeps the same visual weight on a portrait crop and on a wide landscape shot. Press Download all and you get a zip.

Will a watermark stop people from stealing my photos?

It stops casual reuse, which is most of it. Someone who grabs a picture for a blog post or a marketplace listing usually will not bother editing out a mark, and if they do crop it off, a tiled diagonal pattern leaves them very little to work with. A determined thief with content-aware fill or an AI inpainting model can remove a small corner logo in under a minute, so treat the watermark as attribution and a speed bump, not as protection. For real evidence of ownership keep your originals with their EXIF intact and register the work where your jurisdiction allows it.

What size and opacity should I use?

For a corner signature, 15–25% of the image width at 35–50% opacity reads clearly without pulling the eye away from the subject. For proofs and client previews that must not be used unpaid, tile the mark at 40–60% width equivalent, 20–30% opacity, and rotate it about 30°: low contrast across the whole frame is annoying to remove but easy to look past. Turn on the shadow if your text sits over a bright sky.

Can I use a PNG logo with a transparent background?

Yes, and that is the best kind of file to use. Transparency is preserved exactly as it is in the logo. One thing to watch: if you export as JPG, the format has no alpha channel, so any transparent area of the photo itself becomes white. Export as PNG or WebP if the photo needs transparency too.

Does the photo lose quality?

The pixels under the watermark are replaced, and everything else depends on the export format. PNG and WebP re-encode losslessly at high quality; JPG is re-compressed, so the quality slider matters — 90% is visually indistinguishable from the source for almost any photo. Images larger than 4096 px on the longest side are scaled down to that, because Safari on iPhone refuses to export a canvas bigger than roughly 16.7 megapixels and a silent failure would be worse.

What happens with an animated GIF?

Only the first frame is used, and it exports as a still PNG. Animation is out of reach for a canvas-based tool: you would need to decode and re-encode every frame, which needs a GIF encoder the browser does not ship.

Is the watermark burned in permanently?

Yes — the exported file has the mark drawn into the pixels, with no layer to hide. Your original file is untouched, so keep it: the only way back to a clean version is the source photo.

Add a Watermark to Photos Online — Text or Logo

Click to choose photos — or drag & drop them here

JPG, PNG, WebP, GIF, AVIF · several files at once · stamped in your browser, never uploaded

Drop in one photo or fifty, type your name or load a logo, and the watermark appears on the preview as you drag the sliders. Position it in any of nine spots or tile it diagonally across the whole frame, then download a single file or the whole batch as a zip. Your photos are decoded and stamped inside your browser — they are never uploaded, so an unreleased shoot stays on your machine.

How it works

1
Add your photos Click the upload area or drag files onto it. You can select several images at once — JPG, PNG, WebP, GIF, and AVIF all work — and add more later without losing your settings.
2
Choose text or a logo Type the watermark text and pick a font and colour, or switch to the Logo tab and load a PNG with a transparent background. The preview redraws on every change.
3
Place it and dial it in Pick one of the nine positions or Tile, then adjust size, opacity, rotation, and the margin from the edge. A corner mark at 30–45% opacity is the usual starting point.
4
Download the result Save the current photo, or press Download all to get every image stamped with the same settings in one zip. The thumbnail strip lets you check each one first.

Your data stays private

All processing happens entirely in your browser. No files, text, or data are ever sent to our servers. You can disconnect from the internet and this tool will still work.

Frequently asked questions

Are my photos uploaded to a server?: No. Every file is decoded with the browser's own image pipeline and stamped on a canvas in a tab on your computer. There is no upload, no temporary copy on our side, and nothing to delete afterwards. Once the page has loaded you can switch off your connection and the tool still exports files.
Can I watermark several photos at once?: Yes. Select as many images as you like — the same text or logo, position, size, opacity and rotation are applied to all of them. Because the size is expressed as a percentage of each image's width, the mark keeps the same visual weight on a portrait crop and on a wide landscape shot. Press Download all and you get a zip.
Will a watermark stop people from stealing my photos?: It stops casual reuse, which is most of it. Someone who grabs a picture for a blog post or a marketplace listing usually will not bother editing out a mark, and if they do crop it off, a tiled diagonal pattern leaves them very little to work with. A determined thief with content-aware fill or an AI inpainting model can remove a small corner logo in under a minute, so treat the watermark as attribution and a speed bump, not as protection. For real evidence of ownership keep your originals with their EXIF intact and register the work where your jurisdiction allows it.
What size and opacity should I use?: For a corner signature, 15–25% of the image width at 35–50% opacity reads clearly without pulling the eye away from the subject. For proofs and client previews that must not be used unpaid, tile the mark at 40–60% width equivalent, 20–30% opacity, and rotate it about 30°: low contrast across the whole frame is annoying to remove but easy to look past. Turn on the shadow if your text sits over a bright sky.
Can I use a PNG logo with a transparent background?: Yes, and that is the best kind of file to use. Transparency is preserved exactly as it is in the logo. One thing to watch: if you export as JPG, the format has no alpha channel, so any transparent area of the photo itself becomes white. Export as PNG or WebP if the photo needs transparency too.
Does the photo lose quality?: The pixels under the watermark are replaced, and everything else depends on the export format. PNG and WebP re-encode losslessly at high quality; JPG is re-compressed, so the quality slider matters — 90% is visually indistinguishable from the source for almost any photo. Images larger than 4096 px on the longest side are scaled down to that, because Safari on iPhone refuses to export a canvas bigger than roughly 16.7 megapixels and a silent failure would be worse.
What happens with an animated GIF?: Only the first frame is used, and it exports as a still PNG. Animation is out of reach for a canvas-based tool: you would need to decode and re-encode every frame, which needs a GIF encoder the browser does not ship.
Is the watermark burned in permanently?: Yes — the exported file has the mark drawn into the pixels, with no layer to hide. Your original file is untouched, so keep it: the only way back to a clean version is the source photo.

From the blog

How to Watermark Photos Without Ruining Them Where to place a watermark, what opacity actually works, when to tile it, and why a corner logo is easier to remove than you think. Read the post →

Add a Watermark to Photos Online — Text or Logo

How it works

Your data stays private

Frequently asked questions

From the blog

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