View AU Files Online

About AU Files

An .au file is an audio file saved in the AU Audio format, a simple audio file format originally developed by Sun Microsystems for use on Unix-based systems. AU files can store uncompressed PCM audio or compressed audio using formats such as µ-law or A-law, making them a good choice for sound effects, voice recordings, and basic music playback. The format was widely used in early web applications, Unix software, and some digital audio systems due to its straightforward structure and broad compatibility across older platforms.

AU files are often found in software archives, educational media, or old multimedia projects, but they can also appear as standalone audio recordings. Although less common today, users can open and play .au files on FileHelper.com by dragging them to this page.

Converting AU Files

You can convert .au files to other formats to improve compatibility:

• Converting to MP3: Compresses the audio for broad playback on nearly all devices and media players.
• Converting to AAC: Produces a high-quality, space-efficient file for modern devices and apps.
• Converting to WAV: Exports the audio uncompressed, ideal for editing or preserving original fidelity.
• Converting to FLAC: Creates a lossless version that keeps the full quality of the original AU file.
• Converting to OGG: Converts the audio to an open-source format compatible with many programs.
• Converting to M4A: Saves the audio in a widely supported AAC-based container for high-quality playback.
• Converting to OPUS: Produces a compact, efficient file suited for streaming or low-bandwidth use.
• Converting to AIFF: Generates a professional-quality uncompressed file for editing or production.