Key Facts
- Category
- Documents & PDF
- Input Types
- file, checkbox
- Output Type
- json
- Sample Coverage
- 4
- API Ready
- Yes
Overview
The PDF Signature Verify tool allows you to check the authenticity, integrity, and certificate chain of digitally signed PDF documents. By uploading a signed PDF, you can instantly verify if the signature is valid, ensure the document has not been altered since signing, and inspect detailed certificate information.
When to Use
- •When you receive a signed contract or legal agreement and need to confirm the signer's identity.
- •When you want to verify that a PDF document has not been tampered with or modified after being digitally signed.
- •When you need to inspect the certificate chain or extract the PEM certificate details of a signed PDF.
How It Works
- •Upload the digitally signed PDF document using the file input.
- •Choose whether to display detailed certificate information and the raw PEM certificate data.
- •Run the tool to generate a comprehensive HTML verification report showing signature status and certificate details.
Use Cases
Auditing digital contracts to ensure signatures are legally binding and authentic.
Verifying official academic transcripts or certificates issued as signed PDFs.
Inspecting cryptographic certificate details and PEM data for compliance and security audits.
Examples
1. Verify Contract Signature Validity
Legal Operations Specialist- Background
- A legal operations specialist receives a signed vendor agreement and needs to confirm that the digital signature is valid and the document has not been altered.
- Problem
- Confirming the authenticity of the digital signature and checking for post-signature modifications.
- How to Use
- Upload the signed PDF contract, check 'Show Certificate Details', and run the verification.
- Outcome
- The tool generates a report confirming the signature is valid, the document integrity is intact, and displays the signer's certificate details.
2. Extract PEM Certificate for Compliance Audit
Security Auditor- Background
- An auditor needs to verify a signed financial report and extract the raw PEM certificate data for compliance records.
- Problem
- Verifying the signature while also retrieving the raw PEM certificate data from the PDF.
- How to Use
- Upload the signed financial PDF, enable both 'Show Certificate Details' and 'Show PEM Certificate' options, and run the verification.
- Outcome
- The verification report displays the signature status along with the complete PEM certificate block for auditing.
Try with Samples
pdf, filePDF Samples
Generated PDF samples from tools dated 2026-02-01 to 2026-02-10
title token pdf
Markdown Slide Deck Samples
Remark/Marp style Markdown slide decks for testing PDF export layouts
preferred input family pdf
Camera RAW Photo File Samples
Downloadable sample files covering Sony ARW, Canon CR2, Adobe DNG, Nikon NEF, and a generic RAW binary file for testing camera RAW upload workflows.
matched family file
Time Zone Workflow Scheduler ICS Samples
ICS files generated in the same structure returned by the Time Zone Workflow Scheduler, with multiple VEVENT meeting candidates exported from overlap windows
matched family file
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FAQ
What does this tool verify in a signed PDF?
It checks the validity of the digital signature, verifies document integrity to ensure no changes were made, and inspects the certificate chain.
Can I view the raw PEM certificate data?
Yes, by enabling the 'Show PEM Certificate' option, the tool will include the raw PEM data in the verification report.
Does this tool support files other than PDF?
No, this tool only supports PDF documents.
How do I know if a document was modified after signing?
The verification report will explicitly state if the document integrity has been compromised or if modifications were detected.
Is my PDF uploaded securely for verification?
Yes, your file is processed securely to extract signature metadata and verify the certificate chain.