Watermarker
What Watermarker actually does
A watermark is a placement decision, and placement is the one thing most batch tools ask you to guess. You set a corner, a size and an opacity, press go, and find out afterwards that the mark sits on the one part of the photograph that mattered, or that it is illegible against a light sky, or that it is so faint it protects nothing. This page puts the picture on the stage and the mark on the picture while you are still deciding. The nine point grid places a single mark, and the margin is set as a percentage of the shorter side, so a mark sits the same distance from the edge on a portrait and on a landscape frame in the same batch. Tiling repeats the mark across the whole frame at an angle you choose, which is the setting that actually resists a crop. Text is drawn at a share of the image height rather than at a fixed point size, so it stays proportionate across a batch of mixed sizes, and an optional dark outline keeps it readable over a pale background. A logo is scaled to a share of the image width instead. Opacity applies to the mark and not to the picture. Everything happens in the tab: the images are decoded, marked and encoded here and none of them is uploaded.
How to use it
- Drop the images. A batch of mixed orientations is fine, because every measurement is relative to each image rather than absolute.
- Type the text, or choose a logo file. A logo takes over from the text when both are present.
- Place it: pick a corner, an edge or the center, and set the margin as a percentage of the shorter side. Turn on tiling instead when the point is coverage rather than a signature.
- Set the opacity, the size and the color, and keep the outline on when the mark has to survive a light background.
- Check it on the stage, switch to the original to compare, then download the one image or run the batch.
Useful for
- Mark a set of proofs before sending them to a client, with a tiled mark that a crop cannot remove.
- Put a studio name in the same corner of every frame in a shoot, at the same visual distance from the edge whether the frame is portrait or landscape.
- Brand a batch of product photographs with a logo scaled to a fixed share of the image width.
- Produce a visibly marked preview set alongside the clean originals, without either set leaving the machine.
Limits worth knowing
- Text is drawn in the browser's own sans-serif face. The command line tool can load a specific font file, so a marked image from each will place the same box in the same spot and draw the letters slightly differently.
- The tile step comes from the size of the rotated mark and the margin, so a larger mark tiles more sparsely. There is no separate spacing control.
- The mark is composited into the pixels. It is not a separate layer and it cannot be removed from the exported file.
- A mark larger than the frame is placed at the edge rather than refused, so an extreme size setting produces a clipped mark instead of an error.
Questions people ask
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