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Audio Conversion

Convert AU to M4A Online — Free

Fast, free AU to M4A converter. No registration required.

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Sådan konverterer du

1

Upload your .au file by dragging it into the upload area or clicking to browse.

2

Choose your output settings. The default settings work great for most files.

3

Click Convert and download your .m4a file when it's ready.

Hvad er AU?

AU is an audio format created by Sun Microsystems. It's one of the oldest digital audio formats, commonly used on Unix and Java platforms.

Formatdetaljer

Fulde navn
Sun Microsystems Audio
Filendelse
.au

Nøglefunktioner

  • Unix standard
  • Java audio
  • Simple format
  • Legacy support

Hvad er M4A?

M4A is an audio-only MPEG-4 container, commonly using AAC encoding. It provides better quality than MP3 at similar file sizes.

Formatdetaljer

Fulde navn
MPEG-4 Audio
Filendelse
.m4a

Nøglefunktioner

  • Better than MP3
  • Apple ecosystem
  • AAC encoding
  • Metadata support

AU vs M4A

FunktionAUM4A
Fulde navnSun Microsystems AudioMPEG-4 Audio
Filendelse.au.m4a
Bedst tilUnix standardBetter than MP3

Ofte stillede spørgsmål

Converting between lossless formats preserves perfect quality. When converting to lossy formats, our optimized encoding minimizes any audible difference. You can adjust bitrate to control quality vs. file size.
We preserve ID3 tags, album art, and metadata when both AU and M4A support them. Some metadata may not transfer between incompatible formats.
Pro users can batch convert multiple audio files simultaneously. Free users convert one file at a time with up to 5 free conversions per day.
We support all standard sample rates from 8kHz (voice) up to 192kHz (studio quality). The default preserves your source file's sample rate.
Yes. Our audio converter handles music, podcasts, voice memos, and audiobook files. For podcasts, we recommend MP3 at 128-192kbps for the best balance of quality and file size.

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