Diagonal Watermark
Lay a diagonal watermark across your whole image — slanted text or a logo repeating corner to corner — entirely in your browser. Nothing is uploaded.
Privacy-first: every image is processed locally in your browser. Nothing is uploaded, stored or transmitted to any server.
Why the slant does the work
A watermark set straight across an image is easy to miss and easy to crop; one running at an angle cuts through the middle of the picture, where the subject is, and follows no edge a cropper can cut along. This lands at a 45° slant by default — the classic “DRAFT” or “CONFIDENTIAL” look — repeating across the frame so the mark is present everywhere rather than parked in a corner. Drag the angle slider to lay it flatter or stand it steeper.
Present but not in the way
A diagonal mark only works if the image underneath survives it, so spacing, size and opacity are all adjustable against a live preview: widen the gaps for an occasional stamp, tighten them for a dense screen, and drop the opacity until the text is unmistakable but the photo still reads. Use your own logo instead of text if you prefer. Run it over a batch and download the results together — everything renders locally with the Canvas API, so your clean originals never leave the device.
Frequently asked questions
- Are my images uploaded to add the watermark?
- No. The watermark is drawn onto your image locally using your browser’s canvas. Nothing is sent to a server.
- Can I watermark many photos at once?
- Yes. Drop in any number of images and the same watermark settings are applied to all of them. Download results individually or as a single ZIP.
- Can I use my own logo as the watermark?
- Yes. Upload a PNG, JPG, WebP or SVG logo. Transparent areas are preserved, and you can control its size, opacity and rotation.
- How do I position the watermark?
- Use the nine placement presets (corners, edges, center) with an adjustable margin, or simply drag the watermark on the live preview and pull its handles to resize and rotate.
- Can I tile a repeating watermark across the whole image?
- Yes. Switch placement to “Tiled / repeat” and the text or logo repeats diagonally across the entire photo, like the watermarks stock-photo sites use. You can adjust the angle, the spacing between repeats and the size.
- Is the watermark permanent?
- Yes. The watermark is baked into the exported image’s pixels, so it cannot be removed from the downloaded file.