Add Watermark to Images Online

Why use this tool

• Your photos never leave the device

  Watermarking runs entirely in your browser with Canvas. Nothing is uploaded, stored or proxied — which matters most for the unpublished work people watermark.
• One preset, any image size

  Every size is a percentage of the image's short edge, so the same settings look right on an 800px thumbnail and a 6000px original, landscape or portrait.
• Text, logo or full tiling

  Drop a wordmark in the corner, place a PNG logo anywhere, or tile a repeated mark across the whole frame to deter reposting.
• Batch with ZIP output

  Apply one watermark to a whole set and download everything as a single ZIP.

How it works

1. 1Drop one image or a batch. Nothing uploads.
2. 2Pick text or logo, then set size, colour, opacity and rotation.
3. 3Choose a corner, drag it freely, or switch to tiled.
4. 4Export — one file downloads directly, a batch downloads as a ZIP.

Best practices

• Keep opacity between 40% and 70%: readable as a claim of ownership, not so heavy it ruins the image.
• Add an outline or shadow when watermarking photos with mixed light and dark areas — flat white text disappears over bright skies.
• Use tiled mode for proofs and previews; a single corner mark is trivial to crop out.
• Corner marks read best at 4–8% of the short edge. Larger starts competing with the subject.

FAQ

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