Watermark PDF
Add a Watermark to a PDF
Stamp text like “CONFIDENTIAL” or “DRAFT” diagonally across every page. Choose the text and how strong it looks, then download. Runs in your browser.
Options
Your file never leaves your device — everything runs in your browser, with no upload and no signup.
How it works
- Add a PDF file.
- Type the watermark text and pick a strength.
- Click add watermark.
- Your watermarked PDF downloads.
Is it really free and private?
Yes. The whole operation runs in your browser using pdf-lib — no file is uploaded to a server, there is no watermark, and there is no signup.
Can the watermark be removed?
The watermark is drawn into each page, so it is not a simple layer to toggle off. Keep your original file if you need a clean copy.