X509 and TLS Cert Studio is an open-source Linux security utility for inspecting local trust stores, probing remote TLS handshakes, and generating development keypairs, certificate signing requests, and self-signed X509 certificates.

Features:

• System and Local Certificate Store: automatically scans the host CA trust store and user-selected certificate folders or files (PEM, CRT, DER) with expiration status badges, SHA-256 fingerprints, SANs, and full parsed tree.
• Remote TLS Handshake Inspector: connects to any host and port over TLS to display negotiated protocol version, cipher suite, Subject Alternative Names, validity countdown, and one-click server certificate PEM export.
• Development Keypair, CSR and Certificate Generator: creates 2048-bit RSA private keys paired with self-signed certificates or signing requests using custom Common Name and SAN entries saved directly to your chosen folder.

Disclaimer: This project is an independent open-source security utility built on OpenSSL and Python standard libraries.

SUPPORT AND DONATE

• Created by Thanh Nguyen — https://buymeacoffee.com/thanhnv128b