Extract text from voicemail audio files (UL)
To convert UL voicemails to another format, you need Windows Updates Downloader or other Data software.
To convert other file formats to the "Windows Update List File" file type, you need software like Windows Updates Downloader or a similar tool.
The .UL file extension represents a Windows Update List File. These files contain plain-text, XML-structured data that catalogs and points to specific Microsoft Windows updates (Knowledge Base or KB articles). They are primarily utilized by Windows Updates Downloader (WUD), a specialized utility used by system administrators to bulk-download patches for offline system deployment.
The major disadvantage of the .UL format is its obscure extension. While it is fundamentally an XML file, the operating system does not natively associate it with text editors or web browsers. Users often mistakenly try to execute the file as an installer, which fails because the file only contains download URLs, not the actual patch payloads (which are typically MSU or CAB files).
Converting .UL to XML, TXT, or CSV is highly recommended if you need to parse the update links for custom PowerShell scripts or documentation. Because standard online converters do not recognize the .ul extension, they simply reject the upload. This is a highly specialized configuration format. However, convert.guru can easily inspect the file. Just drag and drop your .ul file to identify the format, view the underlying XML text structure, and convert it to an accessible format when possible.
Convert.Guru analyzes your UL file, detects the exact format, and lets you read the text inside.
If you want to convert UL file to , you can use Windows Updates Downloader or similar software from the "Update List Definition" category. In the File menu, look for Save As… or Export….
To convert files to UL, try Windows Updates Downloader or another comparable tool in the "Update List Definition" 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 UL converter.