This App is a demonstrator for QR-Codes on EuroWeld certificates. You can read QR-Codes that are created by the program EuroWeld. CertChecker analyses the QR-Code and shows the parts in a readable form. Additional it checks the signature and says if it is valid or invalid.With the Certipedia-Button you can call the official Certipedia-Website to check your EuroWeld certificate.