PDFtrust - PDF 數位簽章驗證工具
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Verify PDF digital signatures — integrity, certificate chain, trust, timestamp, revocation & LTV. Supports global CAs.
Verify digital signatures in PDF documents with comprehensive security checks. PDFtrust validates document integrity, builds and
verifies the full certificate chain, confirms trust against known root CAs, checks RFC 3161 timestamps, queries revocation status
via embedded OCSP/CRL and online lookups, and assesses Long-Term Validation (LTV) completeness for archival trust. Pre-loaded with
Taiwan PKI trust anchors (TWCA, GCA, MOICA) and supports global certificate authorities. Features automatic PDF detection on
webpages, one-click verification from the browser toolbar, and detailed results with exportable reports. Available in Traditional
Chinese and English.