You can stamp a text watermark like CONFIDENTIAL or DRAFT across every page of a PDF here in your browser: type your text, set the colour, opacity, and angle with a live preview, and download the watermarked file. Nothing is uploaded, and there is no sign-up.
How to add a watermark to a PDF
Open your PDF and type your watermark text.
Pick the color, opacity, and angle with a live preview.
Download the watermarked PDF.
Limits & good to know
The watermark is stamped on every page and auto-sized to each page.
This adds a text watermark; image or logo watermarks are not supported yet.
The watermark becomes part of the exported file — it cannot be removed from the output afterwards.
A password-protected PDF must be unlocked first.
Frequently asked questions
Are my files uploaded to a server?
No. TrulyFreePDF runs entirely in your browser — your file is opened and processed on your own device and is never uploaded, stored, or shared.
Does the watermark go on every page?
Yes, the watermark is stamped across every page, auto-sized to each page.
Is this really free, or free "until you hit a limit"?
Really free. Unlike most "free" PDF sites there is no task-per-day cap, no locked Pro features, no watermark stamped on your file, and no payment step before download. Every tool is the full tool.