Add Watermark to PDF
Stamp a custom text watermark across every page of a PDF, with adjustable size and opacity.
Marking a document as DRAFT, CONFIDENTIAL, or SAMPLE before sharing it prevents it from being mistaken for a final version, and a visible diagonal watermark across every page is the standard way to do this without redoing the document's actual content.
This tool stamps your chosen text across every page of a PDF, with full control over font size, rotation angle (the classic diagonal watermark uses roughly 45°), and opacity (kept low enough to not obscure the underlying content while still being clearly visible). Because it's applied programmatically to every page in one pass, there's no need to manually stamp each page individually in an image editor.
Processing happens entirely in your browser, so watermarking sensitive draft documents before circulation never requires uploading the file to a third party.
How to use Add Watermark to PDF
- 1
Upload your PDF
Drop the PDF you want to watermark into the upload area.
- 2
Set your watermark text
Type the text you want stamped across every page, like DRAFT or CONFIDENTIAL.
- 3
Adjust size, opacity, and rotation
Fine-tune how prominent and how angled the watermark appears.
- 4
Download the watermarked PDF
Every page now includes your watermark, ready to share.
Features
- Custom watermark text, applied to every page automatically
- Adjustable font size, opacity, and rotation angle
- Processed entirely client-side — no file upload
- Preserves original document content underneath the watermark
Frequently asked questions
Common mistakes to avoid
- Setting opacity too high, making the underlying document difficult to read.
- Assuming a watermark provides real security or copy protection — it's a visible marker, not an access control mechanism.
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