Free online AU-to-OPUS converter — upload a AU file and download a OPUS. Fast, private, no signup.
Drop your AU file into the converter above — we auto-detect the real format from its bytes, convert it, and give you a OPUS to download. No software to install.
Yes. Convert AU to OPUS for free right in your browser, with no account needed to get started.
Your file is transferred over an encrypted connection and anonymous uploads are temporary. You can also view and strip metadata (location, device, author) before you download.
Sun/NeXT AU — a simple, long-lived PCM audio container. Modern low-latency lossy audio codec.
Convert AU to: MP3 · WAV · FLAC · M4A · AAC · AC3 · AIFF · CAF · DTS · M4B
Convert to OPUS from: AAC · AC3 · AIFF · AMR · APE · CAF · DFF · DSF · DTS · FLAC