What opacity works best?

15–25% gives a subtle professional watermark that does not obscure content. Higher values suit draft stamps that must be obvious.

What text works best?

Short single words like DRAFT, CONFIDENTIAL, SAMPLE or your company name. Long sentences can overwhelm the page.

Can I remove a watermark later?

Watermarks are burned into the page content permanently, so keep an unmarked copy of important originals.

No. Watermarking runs entirely in your browser.

What opacity works best?

15–25% gives a subtle professional watermark that does not obscure content. Higher values suit draft stamps that must be obvious.

What text works best?

Short single words like DRAFT, CONFIDENTIAL, SAMPLE or your company name. Long sentences can overwhelm the page.

Can I remove a watermark later?

Watermarks are burned into the page content permanently, so keep an unmarked copy of important originals.

No. Watermarking runs entirely in your browser.

Watermark PDF — Free Online

Add text or image watermarks to your PDF.

Drop your file here

or click to browse · max 200 MB per file

Choose File

Tips

→Keep opacity low (15–25%) for a subtle watermark.
→Short words like "DRAFT" or "CONFIDENTIAL" work best.

Other tools

Frequently asked questions

Quick answers about watermark pdf — free, private, no sign-up.

Open the Watermark PDF tool, upload your file, type your watermark text (e.g. CONFIDENTIAL or DRAFT), adjust opacity and size, then click Add Watermark. It is applied diagonally on every page.

How to use Watermark PDF

Done in under a minute — right in your browser.

1
Open the Watermark PDF tool
Go to yumpdf.com/watermark-pdf in any browser.
2
Select your PDF
Upload the PDF to watermark.
3
Customise the watermark
Type your text and adjust opacity and size.
4
Download the watermarked PDF
Save your stamped document.