Add Watermark to PDF
Drop a PDF to add a text watermark across every page. Customize the text, color, opacity, size and position with a live preview.
Adding a watermark means placing semi-transparent text — like 'Confidential', 'Draft', or your company name — across the pages of a PDF. A watermark marks the ownership, status, or sensitivity of a document, discourages unauthorized copying, and makes the purpose of a file clear at a glance without hiding its content.
With Doctor PDF you type your watermark text and control its transparency and angle, then download a PDF with the watermark applied to every page.
The watermark is applied entirely inside your browser. Your PDF is never uploaded, so even confidential documents stay on your own device.
Because everything runs locally, watermarking is instant, works on files of any size, and has no daily limits.
Tired of ads, file limits, and uploading your documents to a stranger's server? Doctor PDF is built differently:
Yes. Doctor PDF adds watermarks 100% free with no limits or sign-up.
Yes. You can add an image watermark such as your logo, or use custom text.
Yes. Adjust opacity, size, angle, and position to get exactly the look you want.
Yes. Everything runs locally in your browser — your files are never uploaded to any server.
Yes, on any modern browser — phone, tablet, or computer.