Convert OPUS to AAC online in seconds — free, with no sign-up. AAC is lossy and ideal for the Apple ecosystem and high-quality streaming. Your files are encrypted and deleted automatically after 24 hours.
AAC
Advanced Audio Coding — A modern lossy codec that sounds better than MP3 at the same bitrate; Apple's default.
How to convert OPUS to AAC
- 1Upload your OPUS file
Click “Choose a file” or drag and drop your OPUS file onto the page — no sign-up or email needed.
- 2Convert to AAC
AAC is already selected as the output. Open Options to fine-tune quality if you like, then click Convert.
- 3Download your AAC file
Your AAC file is ready in seconds — click Download to save it. Files are automatically deleted after 24 hours.
OPUS vs AAC
| OPUS | AAC | |
|---|---|---|
| Full name | Opus | Advanced Audio Coding |
| Type | Audio | Audio |
| Compression | Lossy | Lossy |
| Best for | voice, streaming and real-time audio | the Apple ecosystem and high-quality streaming |
Frequently asked questions
Does converting OPUS to AAC lose quality?
Both OPUS and AAC use compression, so re-encoding discards a little more data. For a single conversion the change is imperceptible to the ear; just avoid repeatedly re-converting the same file.
What's the difference between OPUS and AAC?
Opus (OPUS) is lossy and best for voice, streaming and real-time audio. Advanced Audio Coding (AAC) is lossy and best for the Apple ecosystem and high-quality streaming. Convert OPUS to AAC when you need a audio for the Apple ecosystem and high-quality streaming.
Is the OPUS to AAC converter free?
Yes — converting OPUS to AAC is completely free. There's no watermark, no sign-up and no email required, and you can convert as many files as you like.
Are my OPUS files private and secure?
Yes. Your uploads are encrypted in transit, processed privately, and automatically deleted within 24 hours. We never share, sell or look at your files.
Can I convert OPUS to AAC on iPhone, Android, Mac or Windows?
Yes. The converter runs entirely in your browser, so it works on any device — iPhone, iPad, Android, Mac, Windows or Linux — with nothing to download or install.
How long does it take to convert OPUS to AAC?
Most files convert in a few seconds. Larger files take a little longer, and your upload speed is usually the limiting factor. There's no queue and no waiting for an email.
What else can I convert OPUS files to?
Besides AAC, you can convert OPUS to AIFF, FLAC, M4A, MP3, OGG, WAV and more — see the full list of OPUS conversions below.
Other conversions
Last updated July 2026