ALL IMAGE TOOLS56
Image Watermarker
Add a Watermark to Images Online — Free and Private
Draw a text watermark into an image, with a live preview before you save.
About Image Watermarker
This watermarker draws a line of text into the pixels of your image and hands back a new file. Type the text, pick one of six positions — the four corners, the centre, or tiled across the whole picture — and set its size as a share of the shorter edge, so the mark keeps its proportions whatever the image measures. Opacity, colour and rotation are yours too, and the preview redraws on every change, so nothing is a surprise at download time. Output is PNG, JPG or WebP; JPG cannot carry an alpha channel, so a source with transparency is filled with white before the text goes on, and the tool checks the decoded image and says so before it runs. Be clear about what a drawn watermark is: it becomes part of the picture, which is why it survives re-saving, screenshots and a format change — and equally why anyone can crop it off, clone it out or paint over it. It is a visible credit and an obstacle, not protection. Everything runs in this tab, and the image is never uploaded.
Questions
Does a watermark stop someone using my image?
No. The text becomes part of the picture, so it survives re-saving, screenshots and a format change — but anyone can crop it off, clone it out or cover it, and nothing here prevents a copy being made. Treat it as a visible credit and an obstacle, not as protection. Tiling puts the text over the subject itself, which is the version that is genuinely awkward to remove.
Can I put the watermark across the whole image?
Yes — choose Tiled and the text repeats across the picture instead of sitting in one corner. Rotation applies to every repeat, so a diagonal tile is one slider away.
Why does my transparent PNG come out with a white background?
Because the output format is JPG, which cannot carry an alpha channel. Transparent pixels are filled with white before the watermark is drawn. The tool probes the decoded image rather than guessing from the file extension, so it warns you only when your source really does carry transparency. Choose PNG or WebP to keep it.
How is the watermark size decided?
Size is a share of the image's shorter edge, not a pixel count, so the same setting looks the same on a 900 px thumbnail and a 6000 px original. The preview is drawn at the output's own size, so the proportion you see is the proportion you get.
Does the watermark change the image dimensions?
No. The output has exactly the pixel dimensions of the source; only the pixels under the text change. Metadata is a different story — the image is redrawn on a canvas to apply the mark, so EXIF and GPS tags are not carried over.
Is my file uploaded to a server?
No. Transmute processes everything locally in your browser using JavaScript and WebAssembly. Your files never leave your device — there is no server, no upload, no cloud processing.