Dynamic QR Watermarks

Every viewer sees a unique watermark with their identity. If they screenshot or share your PDF, you'll know exactly who leaked it.

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How Dynamic Watermarks Work

flowchart LR A[PDF Uploaded] --> B[Viewer Opens Link] B --> C{MaiPDF Server} C --> D[Detect Viewer Identity] D --> D1[Email Address] D --> D2[IP Address] D --> D3[Timestamp] D1 --> E[Generate Unique Watermark] D2 --> E D3 --> E E --> F[Overlay on Every Page] F --> G[Viewer Sees Watermarked PDF] G --> H{Viewer Action} H -->|Screenshot| I[Watermark Visible in Image] H -->|Photo| J[Watermark Visible in Photo] H -->|Normal View| K[Read Document] I --> L[Leak Source Identified] J --> L style A fill:#2563eb,stroke:#1e3a8a,color:#fff style E fill:#7c3aed,stroke:#6d28d9,color:#fff style L fill:#dc2626,stroke:#b91c1c,color:#fff style K fill:#059669,stroke:#047857,color:#fff

Static vs Dynamic Watermarks

FeatureStatic WatermarkDynamic Watermark (MaiPDF)
ContentSame for everyoneUnique per viewer
Viewer Identity Email / IP
Leak Tracing Cannot identify source Exact source identified
Deterrence LevelLowHigh
Bypass DifficultyEasy to cropCovers entire page
Original File ModifiedYesNo — rendered in real-time

What the Watermark Displays

Viewer Email

Shows the verified email address of the person viewing the document.

IP Address

Displays the viewer's IP for geographic identification and tracing.

Access Timestamp

Records the exact date and time of the viewing session.

Use Cases

Legal Documents

Contracts, NDAs, and privileged communications. Watermarks create a deterrent and an audit trail if confidentiality is breached.

Business Proposals

Pricing documents and strategic plans. If a competitor obtains your proposal, the watermark identifies the leak.

Educational Content

Exam papers and course materials. Watermarked copies deter students from distributing paid or restricted content.

Financial Reports

Investor updates and quarterly reports. Trace who shared non-public financial information.

Frequently Asked Questions

A unique identifier overlaid on PDF pages during viewing. It displays the viewer's email, IP, or timestamp — making each session traceable.

No. Dynamic watermarks are rendered in real-time during viewing. The original uploaded PDF remains unmodified.

No. Downloads are blocked and the watermark is server-side. Screenshots will always include it.

Static watermarks show the same text for everyone. Dynamic watermarks are unique per viewer, enabling exact leak source identification.

Related Guides

Prevent PDF Forwarding
Dynamic QR Watermark PDF
PDF Security Features

Updated MaiPDF protection path

Use Online Cloud Sharing for speed; use MaiPDF App DRM when screenshots, forwarding, or device access matter

SendPDFOnline pages now describe MaiPDF as a two-level product family: Online Cloud Sharing creates quick browser links and QR codes, while the MaiPDF App creates protected .maipdf packages for sensitive PDFs that need App DRM controls.

Fast cloud link

Upload a PDF, share a browser link or QR code, and keep read code / modify code management.

Protected .maipdf file

Package the PDF in the MaiPDF App with local encryption, license rules, expiry, open limits, and revoke control.

App-only protections

Use protected viewer, device binding, screenshot-aware controls, watermark trace, and license management where supported.

No web page can fully stop screenshots. MaiPDF App DRM is positioned as the stronger path: reduce casual copying, bind access to identity/devices, revoke licenses, and trace leaks with visible watermark information.

Need stronger control?

Create protected .maipdf documents with MaiPDF App DRM.

Open MaiPDF App DRM

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Trace every viewer. Deter every leak. Free.

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