Add a text watermark to a PDF
Stamp wording like CONFIDENTIAL across pages. Choose opacity, font size, color, and position (diagonal, center, or corners). Watermarking runs on your device.
Related tools Compress PDF · Protect PDF · Merge PDF
Drop a PDF
or tap to browse
Processed in your browser — files never uploaded
Questions
How do I watermark a PDF?
Drop a PDF, enter the stamp text, adjust opacity and position, then tap Add watermark. Download the stamped file.
Can I use an image watermark here?
This tool stamps text. For logos or seals, use Background or the editor tools that place images.
Is my PDF uploaded?
No. The watermark is drawn in your browser. Nothing is sent to a server for this tool.
Will the watermark cover the whole page?
Diagonal and center place a large stamp; corner options sit in that corner. Lower opacity keeps the page easier to read.
Can I remove a watermark later?
Not automatically. Keep an unmarked original if you may need a clean copy again.