Watermark PDF
Add a text watermark to every page of a PDF
Click to upload PDF
About Watermark PDF
Watermark PDF is a free online tool that adds a customisable text watermark to every page of a PDF document. Enter your watermark text — "CONFIDENTIAL", "DRAFT", your company name, or any custom string — set the opacity, size, angle, and position, and the tool applies the watermark to all pages of the PDF.
Watermarks serve several important purposes in document management. Confidential documents circulated internally carry a "CONFIDENTIAL" watermark to prevent inadvertent external sharing. Draft documents carry a "DRAFT" watermark to distinguish them from final versions and prevent recipients from treating preliminary content as authoritative. Reviewed and approved documents may carry an "APPROVED" watermark once sign-off is confirmed. Documents shared for preview purposes carry a "SAMPLE" or "NOT FOR DISTRIBUTION" watermark.
Diagonal watermarks at 45° are the most effective at preventing clean reproduction because they visually interrupt the content throughout the page and are difficult to cleanly remove or crop. A semi-transparent watermark (30–50% opacity) is visible enough to communicate its message without obscuring the underlying content. A fully opaque watermark makes the content difficult to read and is inappropriate for documents that recipients need to use.
For brand protection and copyright assertion, watermarks are used on sample documents, proposals, and intellectual property documents shared with clients or prospects. A company name watermark on a shared proposal establishes ownership and discourages reproduction without permission.
How to Use Watermark PDF
- 1Upload your PDF file
- 2Enter the watermark text (e.g. "CONFIDENTIAL", "DRAFT", or your name)
- 3Set the opacity (30–50% recommended), font size, and rotation angle
- 4Choose the watermark position (centre, diagonal, or custom)
- 5Click "Add Watermark" and download the watermarked PDF
Frequently Asked Questions
A basic flat text watermark can be removed by someone with PDF editing software. For stronger protection, use a watermark embedded at the rendering layer. However, watermarks are primarily a deterrent and a clear ownership signal — they are not an absolute security measure.
20–40% opacity is the standard range — visible enough to identify the document status without making the content hard to read. Draft documents often use higher opacity (50–60%) to be more prominent.
This tool adds text watermarks. For image or logo watermarks, use Adobe Acrobat or a dedicated PDF editor. Text watermarks are sufficient for most document control and confidentiality purposes.
Yes. The watermark is embedded in the PDF content stream and will appear on all printed copies as well as on screen.
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