Certificate Checker
Analyze and extract signatures and certificates from executable files (.exe, .efi) or certificate files.
How does this tool work?
Analyze and extract digital signatures and X.509 certificates.
Upload a file (.exe, .efi, .cer, etc.). For PE executables, the embedded signature is located in the security directory and decoded to display issuer, validity, serial number, and fingerprints.
Where are my data processed?
100% Client-Side: Your data never leaves your browser.
All calculations, conversions, encodings, and file processing of this tool are executed exclusively locally via JavaScript on your client device. No inputs, passwords, cryptographic keys, texts, or uploaded files are ever sent to our servers or third parties. Once the page is loaded, the tool remains completely functional even offline.