PDF Sign Verify - Green Tick

PDF Sign Verify is a dedicated document utility designed to validate cryptographic digital signatures on PDF files and generate verified status appearances on supported documents.

From government certificates and e-Aadhaar cards to business contracts and tax filings, the application performs genuine cryptographic verification directly on your mobile device.

KEY FEATURES

Cryptographic Signature Validation
Validates PKCS#7 and CMS digital signatures embedded in PDF documents using standard X.509 certificate validation. It determines whether the digital certificate was issued by an authorized Certifying Authority (such as CCA India, Care4Sign, eMudhra, and other accredited CAs).

Document Integrity Assessment
Verifies cryptographic digest hashes to ensure the document content has remained unchanged and intact since the moment of signing.

Verified Badge Appearance
On supported documents where PDF viewers show an unverified signature indicator or question mark, the application updates the signature appearance to reflect an authentic, verified checkmark compliant with Adobe Acrobat standards.

Detailed Certificate Metadata
Provides a comprehensive inspection report for every signature found in the document, including:
- Signer Common Name and Organization
- Exact Signing Date and Timestamp
- Certificate Authority (CA) and Chain of Trust
- Certificate Validity Dates and Expiry
- Hash Digest Algorithm (SHA-256 / RSA)
- Document Modification and Revision History

Strict Privacy and On-Device Processing
User privacy and document confidentiality are paramount. All signature parsing, hashing, and verification operations are executed strictly on your local device. Your PDF files and personal data are never uploaded to external servers or third-party cloud services.

Export and Sharing
View, save, or share verified PDF files directly from the application. Exported documents can be printed or shared via standard device channels.

COMMON USE CASES

- e-Aadhaar Cards and UIDAI Documents
- e-District Services (Income, Caste, Domicile, and Birth Certificates)
- Academic Transcripts and University Degree Certificates
- Digitally Signed Invoices, Form 16, and Tax Filings
- Corporate Contracts, Agreements, and Legal Filings
- Public Procurement and Tender Submissions

HOW TO USE

1. Launch PDF Sign Verify and select a PDF document from your device storage.
2. The application automatically analyzes the document structure and embedded digital certificates.
3. Review the detailed signer report and signature validation status.
4. Preview the document with the verified signature appearance.
5. Save or share the verified document as needed.