Home › PDF Tools › Watermark PDF
Add a watermark to a PDF
Free · runs in your browser · updated 2026-07-05
To watermark a PDF for free, choose your file, type the watermark text (like DRAFT or CONFIDENTIAL), pick a size and opacity, and click Add Watermark. The stamped PDF downloads instantly — processed in your browser, never uploaded.
How to use the watermark pdf
- Choose a PDFSelect the document to stamp.
- Set your watermarkType the text and choose opacity — 20–30% stays readable without hiding content.
- DownloadEvery page gets the diagonal watermark baked in.
Frequently asked questions
What should I use as a watermark?
DRAFT, CONFIDENTIAL, SAMPLE, DO NOT COPY, or your name/company are the most common. For client proofs, 'PROOF — © Your Name' discourages use before payment.
Can the watermark be removed later?
It's drawn into each page's content, so casual users can't remove it — but it isn't tamper-proof against determined editing. Keep an unwatermarked original.
Will it cover my text?
The watermark is semi-transparent and sits over the page. At 20–30% opacity, underlying text remains readable.
Is my document uploaded?
No — watermarking happens locally in your browser, so the file never leaves your device.