SSL Certificate :

CSR Checker

CSR Checker – Certificate Signing Request

Paste a PEM Certificate Signing Request to decode the subject DN, organization details, and public key algorithm before you submit it to a Certificate Authority. Catch CSR mistakes early and avoid re-issuance delays.

verify the common name yourcompanyname.com for normal ssl certificate and *.yourcompanyname.com  for Wildcard SSL Certificates

CSR tools

Decode a certificate signing request

Paste a PEM CSR to view the subject DN and public key type/size (private key is never uploaded).