Can I use an image or logo instead of text?

Not with this tool — it stamps text only. Use a design tool if you need a logo watermark.

Will the watermark obscure the document content?

The opacity is adjustable — a lower opacity keeps the underlying text readable while still marking the page.

No — the watermark is added entirely in your browser.

Stamp a diagonal text watermark (e.g. "DRAFT" or "CONFIDENTIAL") across every page of a PDF.

Top ad slot

Choose a PDF file

Watermark text

Opacity (%)

Files never leave your device — PDF processing runs entirely in your browser.

Bottom ad slot

1
Choose a PDF

Up to 50 MB.
2
Enter the watermark text

e.g. "DRAFT" or "CONFIDENTIAL", plus font size and opacity.
3
Download the watermarked PDF

Stamped diagonally across the center of every page.

Can I use an image or logo instead of text?: Not with this tool — it stamps text only. Use a design tool if you need a logo watermark.
Will the watermark obscure the document content?: The opacity is adjustable — a lower opacity keeps the underlying text readable while still marking the page.
Does this tool upload my PDF anywhere?: No — the watermark is added entirely in your browser.