Certificate Verification

Independently verify an weitad certificate of sanitization against the signing authority's public key. Runs entirely in your browser — no data leaves this page.

Signing authority

Public key fingerprint (SHA-256):

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Anyone can verify with this key + the certificate's .sig file, or with verify_cert.py offline. Key: pubkey.pem · pubkey.json

Verify a certificate on this server

Choose a certificate

Verify a certificate you were given

Drop the certificate .json (or .pdf) and its .sig here, or choose them below.

Certificate file (.json / .pdf) Signature file (.sig)