Free online OGG to AU converter

OGG is a compressed audio container commonly used with the Vorbis or Opus codecs, offering good sound quality at relatively small file sizes. AU is an older Sun/NeXT audio format that stores sound data in a simple structure and is often used for legacy systems or basic compatibility.

Why convert ogg to au

Converting OGG to AU is useful when you need audio in a format supported by older software, embedded systems, or specific Unix-based tools that expect AU files. Since AU is less common today, conversion is usually done for compatibility rather than quality improvement.

Best software for ogg to au conversion

The best all-around choice is FFmpeg, because it supports both formats, preserves audio quality as much as possible, and works on Windows, macOS, and Linux. For a graphical option, Audacity is also a good choice if you prefer editing and exporting through a user interface.

How to convert ogg to au with ffmpeg

Use FFmpeg from the command line for fast and reliable conversion. Example:

ffmpeg -i input.ogg output.au

This command reads the OGG file and writes it as an AU file. If the AU encoder requires a specific sample rate or channel layout, FFmpeg can also be used to set those parameters explicitly.

How to convert ogg to au with audacity

Open the OGG file in Audacity, then choose File → Export → Export Audio and select AU as the output format. This method is convenient if you want to inspect or edit the audio before saving it.

Things to keep in mind

• AU is an older format, so support may be limited in modern players.
• Conversion may involve re-encoding, which can affect quality depending on the source codec and settings.
• If compatibility is not required, keeping the audio in OGG or converting to WAV or MP3 may be more practical.

Summary

OGG to AU conversion is straightforward with tools like FFmpeg or Audacity. For the best balance of speed, reliability, and format support, FFmpeg is the recommended converter.