Extract text from Win-Test binary logs (WTB)
To convert WTB logs to another format, you need Win-Test or other Data software.
To convert other file formats to the "Binary Log File" file type, you need software like Win-Test or a similar tool.
A .wtb file is a proprietary binary log file generated by Win-Test, a specialized software designed for amateur radio (ham radio) contest logging. It securely stores contact records, known as QSOs, including frequencies, callsigns, modes, and timestamps in a compact, networked structure.
Because it is a compiled binary format, the .wtb file is highly restrictive. You cannot open it in standard text editors or spreadsheet software. It locks your contest data inside the Win-Test ecosystem, which creates a major disadvantage when you need to submit your logs to contest organizers or upload them to universal databases like Logbook of The World (LoTW). Organizers universally reject binary formats.
To share or submit your contacts, you must convert this file into widely accepted text-based ham radio formats, such as ADI (ADIF) for general logbooks or CBR (Cabrillo) for contest submissions. Conversion to a simple CSV file is also common for data backup.
This file format is difficult to open or convert online because only the original Win-Test engine perfectly interprets the custom binary structure. Standard converters fail because they lack the specific parsing logic. If our analysis detects a supported underlying format, partial conversion may still be possible.
Convert.Guru analyzes your WTB file, detects the exact format, and lets you read the text inside.
Users also converted WTD files.
If you want to convert WTB file to CSV, JSON, XML, YAML, YML, TOML, INI, CFG, CONF, DAT, DB or SQL, you can use Win-Test or similar software from the "Amateur Radio Contest Logging" category. In the File menu, look for Save As… or Export….
To convert DBF, XML, SQLITE, XLSX, SQL, TSV, ACCDB, YAML, MDB, CSV, ODS or JSON files to WTB, try Win-Test or another comparable tool in the "Amateur Radio Contest Logging" category.
The history of Convert.Guru began over 25 years ago in California with Tom Simondi’s file-format database. A former contributor to Space Shuttle development and a software pioneer of the 1980s, Simondi established a trusted resource for file type analysis that was even referenced by Microsoft Windows XP. Today, we use modern technology to process and convert thousands of file formats while continually improving our WTB converter.