How to add watermark
- Add your file. Click the drop zone or drag a single PDF onto the page — a live preview appears.
- Choose text or logo. Switch between a text stamp and an image/logo watermark.
- Dial it in. Adjust size, colour, opacity, angle, and which pages it applies to.
- Stack and apply. Add more than one watermark if you need it, then download.
Why do this locally instead of online?
Watermarking is a common step for document sharing — DRAFT, CONFIDENTIAL, DO NOT COPY. The irony of most watermark tools is that you upload a confidential document to a stranger's server in order to stamp it as confidential. This tool renders your watermark using a library running directly in your browser, including the live preview.
Frequently asked questions
Can I preview the watermark before applying it?
Yes — the preview panel shows your actual PDF page with the watermark rendered live.
Can I add more than one watermark?
Yes — configure and stack as many as you need before applying them all at once.
Can I watermark only some pages?
Yes — choose which pages it applies to.
Can I use my own logo image?
Yes — switch to the logo/image type and choose a PNG or JPG.