Validate PDF Signature — Check Digital Signatures Online
Upload a digitally signed PDF to verify signature status, signer details, and certificate information. Quick and secure — all processing stays in your browser.
Key Features
Signature Detection
Automatically detects all digital signature fields in your PDF document, including invisible signatures and certification signatures.
Metadata Extraction
Extracts signer name, signing time, reason, location, and contact information from digital signature fields.
Algorithm Details
Displays the signature algorithm used (e.g., RSA, DSA, ECDSA) and hash algorithm for technical verification.
100% Private & Secure
All PDF analysis happens locally in your browser. Your signed documents never leave your device.
No Installation Required
Works entirely in your browser. No downloads, no plugins. Just upload and validate.
About PDF Signature Validation
This tool analyzes PDF documents to detect and extract digital signature information. When a PDF is digitally signed, the signature data is embedded in the file's structure. Our validator reads this data and displays signer information, signing time, and other metadata. Note that full cryptographic verification of the signature chain may require server-side processing. This tool performs client-side analysis of the signature structure and provides the information available within the PDF document.
How to Validate PDF Signatures — Step by Step
Follow these simple steps to verify the digital signatures in your PDF document:
Upload Your Signed PDF
Click the upload area or drag and drop your digitally signed PDF file. The tool accepts any standard PDF with embedded digital signatures.
Automatic Analysis
The tool automatically scans the PDF structure for digital signature fields and extracts all available metadata and certificate information.
Review Results
Review the validation results including signer identity, signing timestamp, signature algorithm, and the raw signature dictionary data.
Important Notes
This tool extracts digital signature metadata embedded in the PDF structure. Full cryptographic chain validation may require the signer's certificate to be trusted by your system. Visual signatures (images of signatures added as annotations) do not contain cryptographic signing data and cannot be validated. For legally binding signature verification, consult your organization's security policies.