Add a Watermark to a PDF
A watermark makes it obvious which copy is the draft.
Open Watermark PDF3 free tasks a day · No signup · Files never leave your device
Step by step
- 1Open Watermark PDF.
- 2Type your text and set size and opacity.
- 3Apply to all pages and download.
Questions
Can I remove it later?+
Keep the original file — the watermarked copy is a separate download, so your source is untouched.
Are my files uploaded anywhere?+
No. Every PDFOnCall tool runs inside your browser, so the file never leaves your device. That is also why it finishes in seconds instead of waiting in an upload queue.