Trexo PDF Signer – PDF signing with PAdES, LTV and OCSP

Summary: Trexo PDF Signer is an open-source desktop application for creating legally binding digital signatures on PDFs using enterprise-grade security. It supports hardware security modules, software certificates, and native keystores, enabling local cryptographic signing without cloud involvement.

What it does

It enables real cryptographic signing of PDF documents with PKCS#11 hardware tokens, PFX certificate files, Windows Certificate Store, RFC 3161 trusted timestamps, and full Adobe Acrobat compatibility. All operations run locally on the user’s machine.

Who it's for

Professionals in legal, finance, and government sectors requiring secure, compliant PDF signing with hardware tokens and certificate support.

Why it matters

It eliminates the need to upload sensitive documents to the cloud and avoids costly subscriptions while supporting hardware security tokens for secure, compliant digital signatures.