Free Tool
Watermark PDF
Stamp text across every page of a PDF — control size and opacity. Runs in your browser — files never uploaded. Free, no signup.
Click to upload or drag & drop a PDF
One PDF at a time — it never leaves your browser
Why It Matters
Mark It Before You Send It
A draft that looks final, a sample that could be mistaken for the real thing, a confidential document forwarded without context — a clear watermark prevents the confusion before it happens.
This tool watermarks entirely in your browser, so nothing is uploaded anywhere. Upload your PDF, type your text, adjust the look, and download the marked file.
FAQ
Questions About This Tool
No. Watermarking happens entirely in your browser using pdf-lib — your file is never uploaded, stored, or sent anywhere.
Yes. Adjust the opacity slider to make it subtle or bold, and set the text size to fit your document.
Yes, it's applied diagonally across every page of the document, consistent from the first page to the last.
The watermark becomes part of the page content, similar to text stamped by any PDF editor, so it isn't designed to be removed afterward. Keep a copy of your original file if you need an unmarked version later.
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