Watermark a PDF in your browser: stamp a word such as CONFIDENTIAL, DRAFT or COPY, or your logo, across every page. Choose the size, colour, transparency and angle, and whether it appears once in the centre or tiled across the page. The watermark is drawn into each page rather than added as a note anyone can delete with one click, and the preview shows the real output before you download. Several PDFs can be watermarked at once.
How it works
- Drop the PDF, or several to watermark them all the same way.
- Type the text or choose an image, then set its size, opacity, angle and layout while watching the preview.
- Press Watermark & download.
Questions
- Does my file get uploaded?
- No. Everything happens inside your browser on your own device. You can check it yourself: open your browser’s DevTools, watch the Network tab while the tool runs, and you will see no upload. The badge beside the page title counts the bytes this page has sent, live.
- Can someone remove the watermark?
- Not with one click: it is part of the page content, not a separate annotation. But it is a label, not a lock. Someone with a PDF editor and some patience can still take it out, and it does not stop copying or printing. To stop a PDF from being opened at all, password-protect it as well.
- Can the watermark be in Chinese, Arabic or Cyrillic?
- Yes. The standard PDF font only covers Western European letters, so text in other scripts is drawn as an image with your device’s own fonts. It looks the same but cannot be selected or searched, and the panel tells you when that happens.
- Can I use my logo as a watermark?
- Yes. Switch to Image and choose a PNG or JPG (WebP and AVIF are converted first). A PNG with a transparent background looks best; lower the opacity so the text underneath stays readable.