AS2 Certificate Validator
Instantly check certificate validity, key size, and trust chain for AS2 signing and encryption.
We only analyze the public key; no private keys are ever uploaded or stored.
Validation Result: WARNING
Certificate is valid, but key size is insufficient for modern compliance.
Validity
Valid until 2027-01-01
Key Size
1024-bit RSA (Warning)
Usage
Signing & Encryption
Partner DN Match
No Match
How It Works: Certificate Analysis
Upload Certificate File
Upload your public certificate file (PEM, DER, or PFX/PKCS12). The tool securely parses the file contents client-side.
Check Key Parameters
We check key size (RSA 2048+ recommended) and algorithm usage. Outdated keys are flagged immediately.
Validate Trust Chain
The tool traces the certificate path back to a trusted root, identifying any missing intermediate CAs that could cause partner rejection.
Frequently asked questions
What is the most common AS2 certificate error?
The most common issue is a missing intermediate CA in the chain provided to your trading partner, or using an outdated key size like 1024-bit RSA.
Do I need two different certificates for AS2?
AS2 requires a certificate valid for digital signing (for the AS2-To partner) and potentially a separate certificate valid for key encipherment (for encrypting data sent to you).
Can I use a self-signed certificate for AS2?
Yes. If your certificate is self-signed, your trading partner must explicitly trust your public key. For enterprise compliance, a certificate issued by a recognized CA is strongly recommended.
Stop Certificate Surprises.
Ensure your certificates meet partner requirements before you ever send a message.