How to Add Watermark to PDF Online Free
Need to mark your documents as CONFIDENTIAL, DRAFT, or add your company logo as a watermark? PDF Boss lets you add text or image watermarks to any PDF — free, instant, no software required.
How to Add a Watermark to PDF in 3 Steps
Step 1 — Open pdfboss.in/watermark-pdf
Step 2 — Upload your PDF and type your watermark text (or upload a watermark image)
Step 3 — Adjust opacity, size, and position, then download the watermarked PDF
The watermark is applied to every page instantly.
Common Watermark Uses
- CONFIDENTIAL — Mark sensitive documents shared over email or messaging apps
- DRAFT — Indicate that a document is not a final version
- SAMPLE — Add a sample stamp to preview documents shared with clients
- Company logo — Brand all outgoing documents with your company logo
- DO NOT COPY — Discourage unauthorised duplication of proprietary documents
Text Watermark Options
When adding a text watermark you can customise:
- Text — Any word or phrase (CONFIDENTIAL, DRAFT, your name, etc.)
- Font size — From subtle small text to large bold stamps
- Opacity — From barely visible (10%) to solid (100%)
- Rotation — Diagonal (45°) is the classic watermark style
- Colour — Red for warnings, grey for subtle branding, any custom colour
Frequently Asked Questions
Can I choose where the watermark appears?
Yes. You can set the position (centre, corners, tiled), opacity, font size, and rotation angle.
Can I add an image as a watermark?
Yes. Upload a PNG logo or stamp image as a watermark instead of text.
Is the watermark permanent?
Yes. The watermark is baked into the PDF and cannot be removed without the original file.