OneTaskBy Tim King · Updated
Add Watermark to Photo
Text or Logo, Corner or Tiled, Free, No Upload
OneTask is free, with no sign-up, and built by one person.
If this tool saved you time, a coffee helps keep new ones coming.
How the Add Watermark To Image works
Use this to add watermark to photo files in your browser. Add the photo, type the watermark text — a name, a copyright line, a website — and pick where it goes: any corner, the centre, or Tiled for a repeating diagonal pattern across the whole picture. Size and Opacity make it discreet or unmissable. For a logo, switch Watermark to Logo image and press Add image a second time; the logo replaces the text at the same position. Corner and centre marks can be dragged to fine-tune. Download PNG or JPEG gives you the watermarked picture at the original resolution.
Add watermark to photo: what to know first
A watermark does two jobs: it says whose picture this is, and it makes the picture less useful to someone who takes it without asking. A small mark in the corner does the first; a tiled pattern across the whole image does the second, at the cost of the picture looking worse. This page does both, in your browser, with the photo staying on your machine — which is the point of watermarking in the first place.
Text versus logo. A text mark is quick and always crisp because it is rendered as vectors at export. A logo mark is any image file — a PNG with transparency works best — and is scaled to the chosen width. Both use the same position, size and opacity controls, so you can set up the placement with text and swap in the logo after.
Size and opacity. Size is a percentage of the picture's width so the mark is proportionate whatever the resolution. Opacity at 0.3 to 0.5 is the usual compromise: visible, not overpowering. White at half opacity works on most photographs; on a pale sky switch the colour to black or a grey.
Tiled. The tiled pattern repeats the mark on a staggered grid, rotated thirty degrees, right to the edges of the picture. It cannot be moved or deleted individually — it is one pattern — but Size and Opacity change the whole thing at once. A tiled mark is the only kind that cannot be cropped away.
Full resolution. The canvas is the size of the photo, capped at 2400 pixels wide, and the download is at that size. Nothing is resampled apart from that cap, so a 12-megapixel photo comes out at 2400 across; for larger, watermark a smaller copy for the web and keep the original.
Privacy. The photo and logo are read from your disk by the page and drawn to a canvas. No upload, no server, and the download is created locally.
FAQ
Can I watermark many photos at once?
Not on this page — it handles one picture at a time. The settings stay as they are between photos, so the workflow is: Add image, Download, Add image, Download. Batch watermarking of dozens of files is a job for a desktop tool.
How do I stop the watermark being removed?
A corner mark can be cropped off and a faint centre mark can be cloned out; a tiled pattern over the whole image at moderate opacity is the hardest to remove cleanly. No watermark is proof against a determined editor, but tiling raises the effort considerably.
Does the watermark work on PNG transparency?
Yes. A PNG with transparent areas keeps them, and the mark is drawn over both the opaque and transparent parts. Download PNG preserves transparency; JPEG does not.
Can I put text and a logo together?
Yes. Set up the logo mark, then press Add text for a separate text box you can place and style in the Selected item panel. The text box is independent of the Position control.
Is the picture uploaded?
No. Everything happens in the browser tab. The page does not have a server that receives images. The photo and the logo are read locally and never sent to a server; the watermarked file is generated by the browser and downloaded directly.
See also: all Images tools, Audio, Video & Screen, PDF, SVG, Simulations & Screensavers, Generative Art, Chart Makers, 3D Model Viewers, Drawing Pads, Mockups & 3D Making, Diagram Makers, 3D Science, Tracker Music.
Related tools
PDF Watermark
Stamp text across every page of a PDF, in-browser.
Add Text To Image
Write text on a photo with fonts, outline and shadow. No watermark, nothing uploaded.
Image Resizer
Resize to a width, height or percent with the aspect ratio locked.
Image To WebP
Convert to WebP, JPEG or PNG with a quality slider.
Photo Collage Maker
Combine up to nine photos in grid layouts and download one image. Nothing uploaded.