Will the stamp prevent copying or printing?

No — that requires Protect PDF (password). The stamp is a visible deterrent, not a technical control.

Can recipients remove the stamp?

Anyone with the right PDF tool can remove drawn elements. For tamper-resistant marking, combine with Protect PDF and a digital signature workflow.

Are the files uploaded?

No — pdf-lib stamps in your browser; nothing leaves your device.

Confidentiality Stamp

Stamp a configurable confidentiality marker (header band + footer band, with optional date and recipient) onto every page of a PDF.

Your files never leave your browser. All processing happens on your device — nothing is uploaded.

1. Upload your file

How does the Confidentiality Stamp work?

Mark a PDF as confidential with a structured header + footer stamp on every page — different from Add Watermark, which is a single diagonal/centered text mark. Here you get a coloured header band with your label (e.g. "CONFIDENTIAL · ATTORNEY-CLIENT PRIVILEGED") plus a footer band that can include a recipient name and today's date. Useful for legal review copies, draft circulation, M&A data-room exports, and any "this is sensitive — handle accordingly" workflow. Stamps print and survive when the PDF is converted or merged.

🔒 Security & Privacy

All processing happens on your device. Your files never leave your browser, never touch our servers, and are not stored anywhere. Close the tab and the file is gone.

📱 Use it on any device

Works in any modern browser — Mac, Windows, Linux, iPhone, Android, and tablets. No installation, no app to download. Just open the page and start.

⚡ Quick & easy

Drag, drop, click. Most files process in seconds, not minutes. No watermarks added to your output, no per-day limits, and the tool always shows the result before asking you to download.

🎁 Always free, no signup

Free to use, every time. No account creation, no email required, no “trial” that converts to a paid plan. We make money from ads so you don’t have to pay.

Frequently asked

Add Watermark places a single watermark (diagonal, horizontal, or footer text). This tool adds structured header AND footer bands with separate fields for label, recipient and date — closer to the "stamp" convention used in legal/M&A practice.