Watermark PDF is a free online tool that stamps custom text across every page of your PDF. Type your watermark (like DRAFT or CONFIDENTIAL), tune opacity, angle, size, and position - center, tiled, or corners - then download. No signup, and no watermark from us.
Watermark PDF
1. Upload a PDF. 2. Type your watermark text and tune opacity, angle, size, and position. 3. Click “Apply watermark” and download. Only your text is stamped - we never add our own branding.
Drop a PDF file here or click to browse
Processed locally on your device
How to watermark a PDF in 3 steps
- Upload your PDF file.
- Type your watermark text (e.g. DRAFT or CONFIDENTIAL) and tune opacity, angle, font size, and position.
- Click “Apply watermark” and download your stamped PDF.
How do I make a diagonal watermark?
Set the angle to -45° and choose the “Tiled” position for the classic repeating diagonal watermark look. Keep opacity around 20-40% so the text marks the page without hiding the content.
For a subtle document stamp instead, choose “Center” with a smaller font size and low opacity.
Can this remove an existing watermark?
No - this tool only adds watermarks. To remove one, use our free Watermark Remover tool.
The watermark is drawn onto each page permanently when you download, so it survives printing, forwarding, and conversion.
Frequently asked questions
Does this tool add its own branding to my PDF?
No. Only the watermark text you type is added. We never stamp our logo or branding onto your documents.
Can it remove an existing watermark?
No - this tool only adds watermarks. To remove one, use our free Watermark Remover tool.
How do I make a diagonal watermark?
Set the angle to -45° and choose the "Tiled" position for the classic repeating diagonal watermark look.
What font is used for the watermark?
A clean, standard sans-serif (Helvetica) is used so the watermark renders identically on any device or PDF reader.
Are my files uploaded to a server?
No. Watermarking happens entirely in your browser; your files never leave your device.