Building PDF Signature Verification for the Web, Node.js, and Modern JavaScript Runtimes

Most PDF tools stop at rendering. That is useful, but it does not solve the harder problem: Is this signed PDF actually trustworthy? A visible signature field is not enough. A product that works with signed PDFs usually needs to answer things like: Was the document changed after signing? Is the signature cryptographically valid? Does the certificate chain to a trusted root? Was the certificate valid at signing time? Is revocation status available and acceptable? Does the signature meet PAdES expectations? What VerifyKit solves VerifyKit helps applications move from "this PDF has a signature" to "this signature is verified, explainable, and usable in real workflows." Main viewer with PDF rendering and signature-aware verification UI. It is built for teams that need to: verify signed PDFs in the browser show clear signature status in the UI inspect why a signature is valid, invalid, warning, or unknown support React apps and no-build browser integrations run the same verification flow in