UL Converter

Extract text from voicemail audio files (UL)


Drop or upload your .UL file
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How to extract text from your UL file

  1. Click the "Select File" button above, and choose your UL file.
  2. You’ll see a preview, if available.
  3. Click the "Convert file to..." button to extract text information.

Convert UL to another file type

To convert UL voicemails to another format, you need Audacity or other Audio software.

Convert a file to UL

To convert other file formats to the "Raw Audio Data" file type, you need software like Audacity or a similar tool.


About UL files

Most .ul files are Raw µ-law Audio files (G.711), widely used in US telephony and voicemail systems. The core problem is that these files are headerless - they contain raw sound data without the metadata (sample rate, codec info) that players like Windows Media Player or VLC need to recognize them. As a result, users often encounter "unsupported format" errors or static noise when trying to play them. To listen to these recordings, you must convert them to a container format like WAV or MP3. A minority of these files (approx. 7%) are Windows Updates Downloader lists - simple XML text files used by the legacy WUD tool to catalogue software patches. These can simply be opened with any text editor like Notepad++.

Convert.Guru analyzes your UL file, detects the exact format, and lets you read the text inside.


FAQ

If you want to convert UL file to , you can use Audacity or similar software from the "Telephony Audio Recording" category. In the File menu, look for Save As… or Export….

To convert files to UL, try Audacity or another comparable tool in the "Telephony Audio Recording" category.



The UL Converter Story

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.