About Watermark
Watermark adds a line of text over an image at one of five positions, drawn in white with a dark outline so it stays readable against both light and dark backgrounds. It is the simple, fast way to mark a picture as yours before publishing it — a copyright notice, a credit, a client name or a draft label.
The text size is derived from the image width, so the watermark scales with the picture and stays proportionate whether you are working on a 600-pixel thumbnail or a full-resolution photograph. That is deliberate: a fixed point size would be unreadable on a large image and overwhelming on a small one.
What you cannot adjust is how the text is drawn — the colour, the outline and the proportion are fixed, and only the text and the position are yours to choose. The watermark is also burned into the pixels rather than layered on top, so it cannot be removed later without damaging the image, and it will show through any subsequent cropping or resizing that keeps that region.
How to use Watermark
- 1 Choose the image to watermark.
- 2 Type the watermark text.
- 3 Choose which of the five positions it should occupy.
- 4 Download the result and check the text is legible against the background behind it.
Frequently asked questions
Can I change the size or colour of the watermark?
Not from this tool: the text is drawn in a fixed style whose size is proportional to the image width, so it stays readable at any resolution. For a different look you would need to composite the text yourself in an editor.
Can the watermark be removed afterwards?
Not cleanly. It is drawn into the pixel data rather than stored as a separate layer, so removing it means reconstructing the area behind it. That is what makes it useful as a mark of ownership and also what makes it worth previewing before you commit.
Which position is best?
A corner is the conventional choice because it interferes least with the picture, with the bottom right used most often. The centre is much harder to crop away, so choose it when deterring reuse matters more than the composition.
Will the text be readable over a busy area?
It is drawn in white with a dark outline precisely so that it stays legible over both light and dark content. Check the result anyway, since a busy area with similar tones can still reduce legibility at small sizes.
Free, online, and private
Free to use
Watermark is completely free. There is no account to create, no login, and no hidden charge or usage limit.
Runs online in your browser
It is a free online tool that runs entirely in your browser. Nothing to download or install — open the page and start using it right away.
Your data stays private
All processing happens locally on your device. Your input is never uploaded, stored, or tracked, so it never leaves your browser.
How Watermark behaves in detail
These are the specifics of this implementation — the exact ranges, defaults and fixed settings you are working with.
| Parameter | Value |
|---|---|
| Default text | © 2024 — free text, with no length limit enforced anywhere in the code |
| Font size | one twentieth of the image width, with a floor of 16 px, in a bold sans-serif face |
| Styling | white fill at 85 percent opacity over a black outline at 50 percent opacity, 3 px wide — none of it adjustable |
| Position options | 5 — top-left, top-right, bottom-left, bottom-right (default) and centre |
| Offsets | not symmetrical: the bottom edge is inset by half a font size while the top is inset by a full font size plus that same half |
| Applied to | the pixels of the output image, not a layer over it, so the mark cannot be removed by editing the page around it |
Compiled from the implementation of this tool and checked against it by itoolnet.
What Watermark does not do
Knowing the edges of a tool saves more time than another list of its features. These are the cases where it will not do what you might expect.
- No opacity, size, colour, font or rotation is exposed. The only two inputs are the string and the corner, so a large faint mark, a small discreet one, or an angled one are all out of reach.
- Long text is neither wrapped nor scaled to fit. The measured width is subtracted from the canvas width with nothing guarding the outcome, so a string wider than the image is simply clipped at the edge.
- The size tracks the image rather than the text, which means the same wording on a large photo and on a thumbnail is proportionally identical but very different in legibility, and on a narrow image the 16 px floor takes over.
Tested and documented by itoolnet, the team that builds and maintains this site.