How to Add a Watermark to Every Page of a PDF
A diagonal watermark across each page tells readers a document is a draft, confidential, internal, or property of a specific company. idlPDF applies a text watermark to every page in one click, with full control over wording, color, opacity, and size.
Why use this tool
- Mark drafts so reviewers don't mistake them for final versions.
- Label confidential documents before sharing externally.
- Brand proposals and reports with your company name.
- Discourage unauthorized reuse of leaked copies.
Step-by-step guide
- 1
Open the Add Watermark tool
Drop your PDF onto the upload area. The first page appears with a live diagonal preview of the watermark.
- 2
Type your watermark text
Enter any text in the side panel. Common choices are CONFIDENTIAL, DRAFT, INTERNAL, or your company name. The preview updates as you type.
- 3
Adjust color, size, and opacity
Pick a preset color or open the picker for a custom shade. Use the size slider to scale the text, and the opacity slider to control how subtle or bold the stamp looks.
- 4
Apply to all pages and download
Click Apply Watermark. idlPDF stamps the text diagonally across every page and downloads the watermarked PDF.
Tips for best results
- Keep opacity around 30–40% so the watermark is visible without covering important content.
- Red and dark blue read well on most page backgrounds; light gray works for subtle drafts.
- Apply a watermark as the last step in your workflow, after merging, cropping, or signing.
Frequently asked questions
Can I add an image watermark instead of text?
The current tool focuses on text watermarks. For an image-based mark, place the image with the Edit & Sign tool on each page.
Will the watermark be on every page automatically?
Yes. One click stamps every page with the same watermark.
Can a watermark be removed by the recipient?
It's flattened into each page like any printed mark, so casual readers can't toggle it off. A determined editor with desktop tools could still alter the file.
Ready to try it?
Open the tool and follow the steps above. No signup, no upload, no watermark.
Open Add Watermark