Verify PDF Digital Signature
Validate digital certificates and verify electronic signatures in PDF.
AZ2PDF Verify Signature is a free, high-speed online utility designed to validate digital certificates and verify electronic signatures in pdf. Operating securely in volatile RAM memory with automated 5-minute permanent file deletion, your documents remain private without requiring user accounts or software installation.
High-speed secure cloud storage for businesses & developers.
or drop files here
Supports PDF up to 50MBHigh-speed secure cloud storage for businesses & developers.
How it works
Select Signed PDF
Upload or drag & drop a digitally signed PDF document from your device.
Verify Certificate
Validates digital signatures, signer identity, certificate authority, and document integrity.
Download Audit Report
Download a detailed cryptographic verification text report (.txt).
Frequently asked questions
Is Verify Signature on AZ2PDF completely free?
Yes, Verify Signature is 100% free with unlimited usage, no registration required, no subscription fees, and zero watermarks.
Are my documents safe and private?
Absolutely. Files are processed securely in high-speed RAM and permanently purged after 5 minutes by our automated cleanup daemon.
What hidden data elements are purged when I sanitize a PDF file?
Sanitize PDF scrubs metadata dictionaries, embedded JavaScript macros, external web links, attachment streams, invisible thumbnail caches, and revision history layers to prevent confidential data leaks.
What is the maximum file size limit?
You can process files up to 30MB instantly in high-speed RAM, with background asynchronous delivery available for larger documents.
High-speed secure cloud storage for businesses & developers.