FLAC to AU - Online Audio Converter

Convert FLAC to AU online. Private, client-side - no uploadrequired. Batch conversion, quality presets, codec control.

Convert FLAC to AU

[+] Drop FLAC audio here or click to select FLAC

Output format

AU (PCM 16-bit)

Mode[i]

Simple Advanced

Quality[i]

Sample Rate[i]

Channels[i]

About FLAC to AU

Convert FLAC to AU. FLAC halves WAV sizes bit-for-bit with open hardware support. AU is Sun's simple container, usually holding 8 kHz telephony audio. Headers are minimal; verify sample rate after conversion..

Why convert FLAC to AU?

Larger files than lossy shares with AU uncompressed quality.
Keep quality where supported.
Private, no upload - runs in your browser.

FLAC vs AU

Codec	FLAC	PCM 16-bit
Compression	lossless	uncompressed
Sample behavior	Full quality kept	Full quality kept
Typical use	FLAC halves WAV sizes bit-for-bit with open hardware support.	AU is Sun's simple container, usually holding 8 kHz telephony audio.

When not to convert FLAC to AU

Skip AU for the smallest share: lossless output stays large, so prefer a lossy target when sending FLAC files.
Keep a master copy: repeated exports stack small losses, so archive FLAC before batch AU shares.

Limits

Starting point: FLAC - Bit-identical compression near half the WAV size. Apple players prefer ALAC; convert for iPhone libraries. Headers are minimal; verify sample rate after conversion. Encode AU (PCM 16-bit) from FLAC at 256k for music or 128k for speech, starting from the master.

How conversion works

Conversion runs entirely in your browser with FFmpeg WASM. Files never leave your device.

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FAQ

How do I convert FLAC to AU?

Drop your FLAC file onto this page, choose quality and codec settings, then click Convert. The result downloads as AU instantly. All processing runs in your browser.

What codec is used for AU?

The default codec for AU is PCM 16-bit. You can change audio parameters in Advanced mode.

How do you store my files?

We do not store any processed audio. All conversion happens entirely in your browser using FFmpeg WASM.