← All tools

Add a Watermark Without Signup

Mark drafts, protect previews, stamp CONFIDENTIAL — diagonal light-gray text across every page, in seconds.

🔒 100% Private — files are processed entirely in your browser. They never touch our servers.
📄 Drop your PDF here or tap to choose
Up to 500MB · processed on your device · nothing is uploaded

Watermarks without the Adobe tax

Sending a draft contract without a DRAFT stamp is how misunderstandings happen. Acrobat charges $20/month for the privilege. PDFPlug stamps your text diagonally across every page on your device — free to try, and a $3 24-Hour Pass unlocks unlimited clean downloads for a full day. No subscription. No account.

Questions, answered

Can I use my own text?

Anything up to 40 characters — DRAFT, CONFIDENTIAL, PREVIEW, your company name, whatever you need.

Will it make my document unreadable?

No. The watermark is light gray at reduced opacity, drawn behind your reading flow — visible but never blocking.

Can the watermark be removed later?

It's baked into the PDF pages. Keep your original file if you need an unstamped copy.

Is my document private?

Yes. Everything happens 100% in your browser. Your files are never uploaded to any server.