01 / Fast steps
- Type the watermark text above the drop area (CONFIDENTIAL, DRAFT, your company name...).
- Drop or pick your PDF files.
- Download the watermarked PDF.
Add Watermark to PDF
Type the watermark text, drop your PDF and download it with a clean diagonal stamp across every page.
drop your files anywhere in this area
Your files never leave your device.
PDF
02 / Best for
- Mark contracts and proposals as CONFIDENTIAL before sending them.
- Stamp DRAFT on documents still under review.
- Add your name to copies you distribute for feedback.
03 / Why here
- The watermark is typeset into the PDF itself, semi-transparent so the content stays readable.
- Runs entirely in your browser, so sensitive documents never leave your device.
04 / Keep in mind
- The watermark is a visible deterrent, not a protection: someone determined can rebuild the document without it.
- Text only for now; image watermarks are not yet supported.
Tool connections
Related tools
01Sign PDFDraw your signature and place it on any page of a PDF, entirely in your browser: the document is never uploaded.02Add Page Numbers to PDFAdd page numbers to every page of a PDF, centered in the bottom margin, entirely in your browser.03Compress PDFReduce PDF file size for email, upload limits and long-term storage.
faq
Questions, answered.
01Will the watermark cover the text?
It is drawn semi-transparent and diagonal, the standard style for stamps like CONFIDENTIAL: clearly visible without making the page hard to read.
02Is my document uploaded anywhere?
No. The watermark is stamped locally in your browser, so contracts and drafts never leave your device.
03Is Watermark PDF free to use?
Yes, Watermark PDF is completely free, with no sign-up and no usage limits. It runs entirely in your browser, so your data never leaves your device.