Why NUBSEAL for PDF Verification?
NUBSEAL provides server-side PDF verification, digital seal validation, and strong anti-tamper protection for high-trust documents.
Deep PDF Tamper Detection
Detects any post-seal change across PDF content, metadata, and structure.
Instant, Clear Outcomes
Verification results appear immediately with clear and understandable states.
Precise Digital Seal Placement
Place a professional digital seal exactly where you need it to match document layout and compliance.
Batch PDF Sealing
Seal multiple PDF files in one operation to accelerate high-volume verification workflows.
Audit Log + CSV Export
Track all sealing and verification events with detailed logs and export-ready CSV reports.
NUBSEAL vs Visual Stamps & QR-Only Methods
| Feature | NubSeal | Visual Stamp Only | QR Only |
|---|---|---|---|
| Real verification by uploading PDF | |||
| Detects any post-seal modification | |||
| Clear verification outcomes | |||
| Works with multi-page files | |||
| No camera dependency | |||
| Reduces user errors (no complex input) | |||
| Custom seal placement | |||
| Batch sealing | |||
| Operation log + CSV export | |||
| Suitable for printing and sharing |