Add a Text Watermark to an Image

Add a watermark to an image instantly with this free online tool that runs 100% in your browser. Overlay a single or repeating diagonal text watermark on any photo — JPG, PNG, WebP and more — and fine-tune the font size, opacity and colour with a live preview. Turn on tiling to repeat the text diagonally across the whole picture, or place a single centered mark. Because the watermark is drawn locally on a canvas, your image is never uploaded and never leaves your device. When you like the result, download the watermarked PNG in one click.

🔒 100% private — files never leave your device

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How to use

  1. Select or drop an image (JPG, PNG, WebP and more).
  2. Type your watermark text, then adjust font size, opacity and colour.
  3. Toggle tiling on to repeat the text diagonally, or off for a single centered mark.
  4. Preview the result live and download the watermarked PNG.

Frequently asked questions

What image formats can I watermark?

Any common image your browser can open, including JPG, PNG and WebP. The watermarked result is always saved as a PNG to preserve quality.

Is my image uploaded to a server?

No. The watermark is drawn locally on a canvas in your browser, so your image never leaves your device and nothing is uploaded.

Can I repeat the watermark across the whole image?

Yes. Turn on the tile option to repeat your text diagonally so it covers the entire image, which makes it harder to crop out.

Can I use a logo or image as the watermark?

Not in this tool — it adds a text watermark only. You can set the text, font size, opacity and colour, but not an image or logo overlay.

How do I control how visible the watermark is?

Use the opacity slider to make the text subtle or bold, pick any colour with the colour picker, and set the font size from 8 to 256 pixels.

Why is the output a PNG?

PNG is lossless, so it preserves the watermark and image detail without adding extra compression artefacts. The output keeps the original image dimensions.

About this tool

Add a single or repeating diagonal text watermark to any image, with adjustable font size, opacity and colour. Runs fully in your browser — private, with no upload.

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