Validate PDF Digital Signature
Validates the digital signatures in a PDF file using PKIX path building and time-of-signing semantics. Supports custom trust anchors. Input:PDF Output:JSON Type:SISO
Validate PDF Digital Signature
The Validate PDF Digital Signature tool helps you check whether a digitally signed PDF is authentic and trustworthy. It verifies if the signature is valid, unchanged, and issued by a recognized certificate authority.
This tool is useful when you receive signed documents and need to confirm their integrity before accepting or sharing them.
Why Validate a PDF Digital Signature?
Digital signatures are used to prove document authenticity. However, a file can be altered after signing or signed using an invalid certificate.
This tool helps you:
- Confirm whether a PDF signature is valid
- Detect changes made after signing
- Verify the signer’s digital certificate
- Ensure document integrity and trust
It provides confidence when handling important documents.
How the Tool Works
Validating a digital signature is easy:
- Upload the signed PDF file
- The tool checks the digital signature details
- Signature status and certificate information are analyzed
- View the validation result instantly
The PDF file itself is not modified.
Key Features
- Verifies digital signatures in PDF files
- Detects tampered or altered documents
- Checks certificate validity and trust status
- Online processing with no installation
- Works on all modern devices
The results are clear and easy to understand.
When This Tool Is Most Useful
This tool is ideal for:
- Legal and contract documents
- Government or official forms
- Business agreements and invoices
- Signed reports and approvals
It helps ensure documents are genuine and reliable.
Security and Privacy
Your document safety is a priority:
- Secure and encrypted processing
- No permanent file storage
- Automatic deletion after validation
Your files remain private at all times.
Frequently Asked Questions
Q1. Does this tool verify who signed the document?
It verifies the digital certificate used for signing and checks its validity.
Q2. Will this tool change my PDF file?
No, the file remains unchanged during validation.
Q3. Can it detect if a document was edited after signing?
Yes, it identifies any changes made after the signature was applied.
Q4. Does it support multiple signatures?
Yes, all detected signatures are checked individually.
Related PDF Tools
You may also find these tools helpful:
- Sign PDF with Digital Certificate
- Remove Digital Signature from PDF
- Get PDF Security Information
- Sanitize PDF
These tools help manage signed documents efficiently.