Add Watermark to PDF
Stamp a text watermark across every page of your PDF. Customize the text, opacity, font size, and angle. Everything runs in your browser — your files are never uploaded.
Drag & drop files here or click to browse
Max file size: 100.0 MB
How to Add a Watermark to a PDF
Upload your PDF
Drag and drop or click to select the PDF file you want to watermark.
Customize your watermark
Enter your watermark text (e.g., "CONFIDENTIAL" or "DRAFT") and adjust the opacity, font size, color, and position to your liking.
Apply and download
Click "Add Watermark" and download your watermarked PDF. The watermark appears on every page. Your original file is never modified.
Watermarking for drafts, copyright, and confidentiality
The three legitimate reasons to watermark are marking a document as a draft so the recipient knows it is not final, asserting copyright on a portfolio piece you are sending to a client, and labeling a document "CONFIDENTIAL" so it cannot be casually forwarded without context. A watermark is not security — anyone can remove it with the right tool — but it is an effective deterrent and a clear signal of intent.
Practical guidance: a diagonal watermark at 30–40% opacity in light gray sits behind text without making the document hard to read; pure black at 100% will dominate the page. For draft markings, use 60-point font and place the watermark at the page center; for copyright notices, use 14-point along the bottom edge. Avoid watermarking PDFs with form fields you want recipients to fill out — text watermarks render in front of fields and can make them unreadable. If you need a legally binding mark, use a digital signature in your PDF reader instead; this tool produces visual watermarks only.