Free
Add a watermark to a PDF
Text or a picture, across every page or just a few. Free.
Free, with no account, no watermark and no page limit.
Updated 25 October 2026
The short answer
PDF Coast adds watermarks on your own PC, for free. Open the PDF and choose Watermark in the Tools panel. Use a preset such as DRAFT, type your own text, or choose a picture like a logo. Set the placement, angle and opacity, pick the pages, and apply. You can change or remove the watermark later.
- Price
- Free, no watermark
- Your file
- Stays on your PC, never uploaded
- Internet
- Not needed
- Works on
- Windows 10 and 11
How to do it
- Open the PDF and choose Watermark in the Tools panel.
- Choose Text and pick a preset or type your own, or choose Picture.
- Set the placement (diagonal or horizontal), the opacity and the pages.
- Apply and save.
Add a watermark online, or on your PC?
Online converters are handy on a phone. For anything private, a desktop app is safer.
 PDF Coast |
Typical online converter | |
|---|---|---|
| Your file is uploaded | Never | Yes, to their servers |
| Works without internet | Yes | No |
| Limits on free use | None on free tools | Daily or file-size limits are common |
| Account | Not needed | Often needed after a few files |
Questions
Can I use my logo as a watermark?
Yes. Choose Picture, pick the image, and set its size and opacity.
Can I remove the watermark later?
Yes, for watermarks added by PDF Coast. They can be updated or removed at any time.
Is it free?
Yes, with no account and no limit on pages.
Is my file uploaded anywhere?
No. PDF Coast opens and saves the file on your own computer, and works with the internet switched off. Nothing about the document is sent anywhere.
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Get PDF Coast for free
Everyday PDF work is free forever. Pro is US$26.49 once, and you can try every Pro tool free for 14 days. No account, no card, no subscription.
Windows 10 and 11, 64-bit. English, 简体中文 and 繁體中文.