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PDF Stamp Online Free — PrivaTools

TL;DR: Upload a PDF and stamp every page with a text label like 'DRAFT' or 'CONFIDENTIAL' — download the stamped copy.

Add stamps to PDF online for free — apply CONFIDENTIAL, DRAFT, APPROVED, COPY, VOID, or custom text stamps to any page. Adjustable opacity, position, and size. No sign-up, no watermarks.

PDF Stamp is part of PrivaTools — a free, open-source alternative to iLovePDF, Smallpdf, and Adobe. Server-side tools process your file in an isolated container and discard it immediately; many tools never upload at all and run entirely in your browser.

How to PDF Stamp with PrivaTools

  1. Upload your PDF — Drop a PDF up to 500 MB.
  2. Choose a stamp — Preset: APPROVED, CONFIDENTIAL, COPY, DRAFT, FINAL, NOT APPROVED, SAMPLE, VOID. Or custom: your own text.
  3. Set opacity and position — Opacity 0-1 (default 0.5). Position: top/middle/bottom × left/center/right. Click Apply.

Frequently Asked Questions

Are stamps editable annotations or baked-in?

Baked into the page content. They survive copying, printing, and PDF/A conversion. To remove, use Whiteout to cover them.

Can I apply a stamp to only specific pages?

Yes — pages parameter accepts page ranges like '1-3' or 'all'.

How big is the stamp?

Auto-sized to roughly 60% of page width with the chosen opacity for visibility without obscuring content.

Last reviewed 2026-05-01 by the PrivaTools maintainers. Source code on (MIT-licensed, self-hostable).

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