Convert AAC to OPUS online in seconds — free, with no sign-up. OPUS is lossy and ideal for voice, streaming and real-time audio. 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 AAC to OPUS
- 1Upload your AAC file
Click “Choose a file” or drag and drop your AAC file onto the page — no sign-up or email needed.
- 2Convert to OPUS
OPUS is already selected as the output. Open Options to fine-tune quality if you like, then click Convert.
- 3Download your OPUS file
Your OPUS file is ready in seconds — click Download to save it. Files are automatically deleted after 24 hours.
AAC vs OPUS
| AAC | OPUS | |
|---|---|---|
| Full name | Advanced Audio Coding | Opus |
| Type | Audio | Audio |
| Compression | Lossy | Lossy |
| Best for | the Apple ecosystem and high-quality streaming | voice, streaming and real-time audio |
Frequently asked questions
Does converting AAC to OPUS lose quality?
Both AAC and OPUS 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 AAC and OPUS?
Advanced Audio Coding (AAC) is lossy and best for the Apple ecosystem and high-quality streaming. Opus (OPUS) is lossy and best for voice, streaming and real-time audio. Convert AAC to OPUS when you need a audio for voice.
Is the AAC to OPUS converter free?
Yes — converting AAC to OPUS 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 AAC 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 AAC to OPUS 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 AAC to OPUS?
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 AAC files to?
Besides OPUS, you can convert AAC to AIFF, FLAC, M4A, MP3, OGG, WAV and more — see the full list of AAC conversions below.
Other conversions
Last updated July 2026