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Certificate Checker

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Drop file (.efi, .exe, .dll, .sys, .cer, .crt, .pem, .p7b) here or click

How it works

Analyze and extract digital signatures and certificates from executables and certificate files directly in your browser.

Upload a file (.exe, .efi, .cer, etc.). For executable files (PE), the header is analyzed to locate the digital signature (Security Directory). The embedded PKCS#7 signature data is extracted and the contained X.509 certificates are decoded. Important details like Issuer, Expiry, Serial Number, and cryptographic fingerprints are displayed.

Info Processing happens entirely locally in your browser.

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