# Validate PDF Signatures

Published articles for Validate PDF Signatures.

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## How to Validate PDF Digital Signatures in JavaScript with Timestamps and Long-Term Validation (LTV)

DevFeed: [How to Validate PDF Digital Signatures in JavaScript with Timestamps and Long-Term Validation (LTV)](<https://devfeed.tech/articles/how-to-validate-pdf-digital-signatures-in-javascript-with-timestamps-and-long-term-validation-ltv-117749.md>)

Original publisher: [Read original article](<https://www.syncfusion.com/blogs/post/pdf-signature-validation-javascript>)

Author: Sumathi Uthayakumar

Published: 2026-11-04T15:30:00Z

Content type: tutorial

Language: en

Sources: [Syncfusion](<https://devfeed.tech/sources/syncfusion-blogs.md>)

Topics: [pdf](<https://devfeed.tech/topics/pdf.md>), [certificates](<https://devfeed.tech/topics/certificates.md>), [JavaScript](<https://devfeed.tech/topics/javascript.md>)

Tags: [digital-signature](<https://devfeed.tech/tags/digital-signature.md>), [digital-signature-pdf-javascript](<https://devfeed.tech/tags/digital-signature-pdf-javascript.md>), [digital-signatures](<https://devfeed.tech/tags/digital-signatures.md>), [document-processing](<https://devfeed.tech/tags/document-processing.md>), [document-processing-javascript-pdf-web-what-s-new](<https://devfeed.tech/tags/document-processing-javascript-pdf-web-what-s-new.md>), [file-formats](<https://devfeed.tech/tags/file-formats.md>), [how-to](<https://devfeed.tech/tags/how-to.md>), [javascript](<https://devfeed.tech/tags/javascript.md>), [javascript-pdf-library](<https://devfeed.tech/tags/javascript-pdf-library.md>), [javascript-pdf-signing](<https://devfeed.tech/tags/javascript-pdf-signing.md>), [long-term-validation-pdf](<https://devfeed.tech/tags/long-term-validation-pdf.md>), [net-pdf-library](<https://devfeed.tech/tags/net-pdf-library.md>), [pdf](<https://devfeed.tech/tags/pdf.md>), [pdf-digital-signature-javascript](<https://devfeed.tech/tags/pdf-digital-signature-javascript.md>), [pdf-signature-validation](<https://devfeed.tech/tags/pdf-signature-validation.md>), [pdf-signature-validation-javascript](<https://devfeed.tech/tags/pdf-signature-validation-javascript.md>), [pdf-timestamp-signature](<https://devfeed.tech/tags/pdf-timestamp-signature.md>), [security](<https://devfeed.tech/tags/security.md>), [sign-pdf-in-javascript](<https://devfeed.tech/tags/sign-pdf-in-javascript.md>), [syncfusion](<https://devfeed.tech/tags/syncfusion.md>), [timestamps](<https://devfeed.tech/tags/timestamps.md>), [validate-pdf-signatures](<https://devfeed.tech/tags/validate-pdf-signatures.md>), [validation](<https://devfeed.tech/tags/validation.md>), [web](<https://devfeed.tech/tags/web.md>), [what-s-new](<https://devfeed.tech/tags/what-s-new.md>)

### AI overview

The Syncfusion JavaScript PDF Library's 2026 Volume 3 release adds signature validation and Long-Term Validation (LTV). The guide describes signing PDFs with a PFX/P12 certificate, adding a trusted timestamp through a TSA callback and asynchronous save, then reloading the signed PDF to embed OCSP or CRL evidence with enableLTV(). Developers can validate one signature or all signature fields, reviewing integrity, certificate-chain trust, timestamps, and revocation results; a single overall Boolean may not capture each signature's status. Long-term verification is not guaranteed: it depends on signature integrity, available certificate and revocation evidence, chain building, and validator trust policies. The text cautions against exposing private keys or certificate passwords in browser code and says applications must implement TSA and revocation network handling.

### Source excerpt

Learn how to sign PDF documents in JavaScript, add trusted timestamps, enable Long-Term Validation (LTV), and validate digital signatures using the Syncfusion JavaScript PDF Library.