Add text watermark to PDF
Overlay a text watermark on selected PDF pages.
Local processing · Nothing is uploaded · 10 MB per file / 25 MB total
Input & settings
No files selected
Result
How to use
Choose the source file, review settings, process, then inspect and download the result.
Limits and behavior
Helvetica WinAnsi characters only; watermark overlays existing content. Local processing. Maximum 10 MB per file, 25 MB total and 100 PDF pages. Encrypted PDFs require the separate known-password decryption tool. Digitally signed input may lose signature validity after any modification; preserve your original. Unsupported or malformed files produce an error. Cancellation stops active PDF renders and discards stale results; a synchronous library step finishes before the browser can handle cancellation.
Add a text watermark to PDF pages
Overlay a custom text watermark on chosen PDF pages to label drafts, internal documents or review copies. This PDF watermark tool is for visible labelling rather than encryption or access control.
Does a PDF watermark protect against unauthorized copying?
No. Visible text watermarks are labels, not DRM or a guarantee that documents cannot be copied or edited.