How to Add a Watermark to a PDF Online
Free, step-by-step guide. No signup needed — everything runs in your browser.
1
Open the PDF Watermark tool
Navigate to the tool. No signup, no upload to a server.
2
Upload your PDF
Drop any PDF — contracts, drafts, photographs compiled into a PDF, any document.
3
Configure the watermark
Type the text (e.g., CONFIDENTIAL, DRAFT, your name). Adjust opacity, font size, rotation angle, and color. Preview shows the placement live.
4
Download the watermarked PDF
Hit Apply — the watermark is stamped across every page. Download the result instantly.
Tips for best results
- Diagonal watermarks (45° rotation) are most readable and hardest to crop out — the classic CONFIDENTIAL or DRAFT look.
- Keep opacity between 15-30% for a subtle stamp that doesn’t obscure the text underneath.
- Use larger font sizes (60-120pt) for full-page watermarks. Smaller sizes (24-48pt) for repeating tiles look professional.
- Pick a color with intent: red for warnings, gray for neutral marking, dark navy for legal documents.
- Watermarks are added as a layer over the original content — your source PDF is preserved underneath.
Try PDF Watermark now
Add text watermarks across PDF pages. Free, no signup, 100% private.
Open PDF Watermark