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AU to OPUS Converter
Convert AU files to OPUS in seconds, free and unlimited.
🔒 Files are processed on your device. Nothing is uploaded.
How to convert AU to OPUS
- Click Choose files or drop your AU files into the box. You can add several at once.
- Make sure OPUS is selected as the output format.
- Press Convert, then download your OPUS files.
AU
Sun/NeXT audio format, an early Unix sound file.
OPUS
Modern open codec with the best quality at low bitrates. Used by WhatsApp, Discord and YouTube.
Video and audio are converted with FFmpeg running inside your browser. Short clips finish in seconds; long or high-resolution videos can take a few minutes because your own device does the work. Open Options to trim, resize or change quality.
Other AU conversions
Convert other files to OPUS
- MP4 to OPUS
- WEBM to OPUS
- MKV to OPUS
- MOV to OPUS
- AVI to OPUS
- FLV to OPUS
- WMV to OPUS
- MPEG to OPUS
- MPG to OPUS
- M4V to OPUS
- 3GP to OPUS
- 3GPP to OPUS
- 3G2 to OPUS
- OGV to OPUS
- TS to OPUS
- MTS to OPUS
- M2TS to OPUS
- VOB to OPUS
- MXF to OPUS
- DV to OPUS
- MOD to OPUS
- RM to OPUS
- RMVB to OPUS
- MP3 to OPUS
- WAV to OPUS
- OGG to OPUS
- OGA to OPUS
- FLAC to OPUS
- AAC to OPUS
- M4A to OPUS
- M4B to OPUS
- M4R to OPUS
- WMA to OPUS
- AC3 to OPUS
- AIFF to OPUS
- AIF to OPUS
- AIFC to OPUS
- AMR to OPUS
- CAF to OPUS
- VOC to OPUS
- WEBA to OPUS
FAQ
Is converting AU to OPUS free?
Yes. Unlimited conversions, no sign-up, no watermark.
Are my files uploaded to a server?
No. FieldConvert processes files inside your browser, so your AU files never leave your device. That makes it private and fast, because there is no upload or download wait.
Is there a file size limit?
Only your device's memory. Files up to about 2 GB work in most desktop browsers.