Image Watermark Tool
Stamp text watermarks onto photos in your browser.
How to use
- 1 Drop an image onto the box, or click to choose a file.
- 2 Type your watermark text.
- 3 Pick a position, then tune colour, size, opacity and margin.
- 4 Watch the live preview and adjust until it looks right.
- 5 Click Download PNG to save the watermarked image.
About Image Watermark Tool
The Image Watermark Tool overlays your own text — a copyright line, a name, a URL or a draft label — onto any picture, with full control over how it looks and a preview that updates as you type.
Drop in a JPEG, PNG or WebP and the watermark is drawn with the Canvas API entirely inside your browser, so the original image is never uploaded.
You decide everything: the exact wording, which of nine anchor positions it sits in (the four corners, the edge centres or dead centre), the colour, the opacity for a subtle see-through stamp, the margin from the edges and the font size — expressed as a percentage of the image so it scales sensibly whether the photo is a thumbnail or a poster.
The placement maths keeps the text neatly inside the frame even when it is long, and every adjustment redraws from the untouched source so changes never pile up or smear.
This is handy for photographers protecting proofs, designers marking comps as DRAFT, or anyone who wants a quick credit on a screenshot before sharing it.
Since the whole job runs on your device with no server round-trip, it is safe for unreleased work and private images, and it keeps working offline once loaded.
When the preview looks right, download a lossless PNG of the watermarked result.
FAQ
Is my photo uploaded to add the watermark?
No. The text is drawn onto the image with the Canvas API inside your browser, so the picture never leaves your device.
Can I make the watermark semi-transparent?
Yes. The opacity slider goes from fully transparent to fully opaque, so you can create a subtle see-through stamp.
Will the watermark size look right on different images?
The font size is a percentage of the smaller image dimension, so it scales proportionally whether the photo is small or large.