Watermark PDF
Mark documents as DRAFT, CONFIDENTIAL, SAMPLE, or anything else with a text watermark across every page. You control the text, font size, angle, and opacity — a light 30% diagonal stamp is the classic choice, while a bold horizontal band works for samples. Watermarks are drawn directly onto each page as vector text, keeping files small and sharp. Use it before sending proposals, contracts, or portfolio pieces so recipients know exactly what they are looking at. Everything is applied locally in your browser — no account, no watermark limits.
Guide: How to Edit a PDF — step-by-step walkthroughHow to use Watermark PDF
Add your PDF
Click the file picker and select the document you want to stamp.
Customize the watermark
Enter the text and adjust size, angle, and opacity to taste.
Watermark and download
Click Watermark PDF and save the stamped document to your device.
Tips for best results
- Keep opacity around 20–40% so the watermark marks the page without hiding content.
- A 45° diagonal angle reads naturally across portrait pages.
- Use short uppercase words like DRAFT or CONFIDENTIAL for instant recognition.
Frequently asked questions
Is the watermark permanent?
Yes — it is drawn onto each page, so it cannot simply be switched off by the recipient. It is applied to a new copy, and your original file remains unchanged.
Will the watermark make my file much bigger?
No. Watermarks are stored as vector text rather than images, so even watermarked across hundreds of pages the file grows only marginally.