Mark up a document before sharing it
Sending a draft, a sample, or a confidential file? Drop your PDF above, type the watermark text, adjust its opacity and size, and download a copy with the watermark stamped diagonally across every page.
Need page numbers instead? Try Add Page Numbers to PDF.
Frequently asked questions
Is my PDF uploaded to add the watermark?
No. The watermark is drawn onto the PDF entirely in your browser using an open-source PDF library — the file never leaves your device.
Can I control how visible the watermark is?
Yes — the opacity slider goes from a faint 5% to a bold 80%, and the size slider controls how large the text is.
Can I remove a watermark added by this tool?
Not with this tool — it only adds watermarks. Keep your original, un-watermarked file if you'll need it later.