Trusted QSLTrusted QSL 
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Trusted QSL (tqsl.exe). Open source libraries and utilities to support using digital signatures for Amateur radio QSL information.
Access open-source libraries and utilities designed to simplify the process of using digital signatures for Amateur Radio QSL data. Perfect for radio operators who want to securely sign and upload their QSOs to the ARRL's Logbook of the World (LoTW) online service. This powerful tool also helps manage Callsign Certificates used for digitally signing QSOs.
With support for common log file formats like ADIF and Cabrillo, TQSL makes it easy to manage your logbook, ensuring your data is both secure and compliant. Whether you’re an experienced operator or new to digital signing, this solution offers a reliable and efficient way to handle all your QSO uploads and certificate management needs.