Add Watermark to PDF
Stamp your documents with custom text watermarks. Adjust transparency, typography, and positioning. No sign-up required, and guaranteed absolute privacy.
How to Add Watermarks
Upload File
Drag and drop the PDF you want to protect into the box above, or click to select a file.
Customize Text
Type your watermark message, choose a font, adjust opacity, and drag it exactly where you want it on the page.
Apply & Download
Click apply. The watermark will be stamped on every page in your browser and will download instantly.
Why trust PDFsHero for watermarks?
Unmatched Privacy
Unlike traditional cloud platforms, we use specialized WebAssembly libraries to stamp your files directly on your machine. Your private documents are never sent across the internet to external servers.
Zero Latency
Because there is no upload process or queuing line, your files are processed instantly the moment you hit the button. Experience the power of desktop software right in your browser tab.