How to convert OPUS to AAC
To convert OPUS to AAC, upload your OPUS file, choose AAC as the output format and press Convert. The finished AAC file is ready to save to your phone or computer in seconds, free, with no watermark and no sign-up. Your file is deleted from our server about 30 minutes after the conversion.
This free online converter turns OPUS audio files into AAC in your browser, with no software to install and no watermark. The conversion runs on our server using ffmpeg, and the result is ready to save to your phone or computer in seconds. Your OPUS file is deleted automatically about 30 minutes after the conversion.
What you get with OPUS to AAC
- Better quality than MP3 at the same size
- The default audio of YouTube and Apple
- Efficient at low bitrates
- Opens in: iPhone, Android, Windows, macOS, VLC and most hardware players
What to expect from this conversion
- Both formats are lossy, so converting costs a little extra quality. If you still have the original, convert from that.
- AAC output is a raw ADTS stream without a container, which plays in most players but stores no cover art. Choose M4A if you need tags.
- Tags such as title and artist are carried over where AAC supports them.
OPUS vs AAC
| Property | OPUS | AAC |
|---|---|---|
| Full name | Opus Interactive Audio Codec | Advanced Audio Coding (ADTS stream) |
| Released | 2012, IETF (Xiph.Org, Mozilla, Skype) | 1997, MPEG (Fraunhofer, Dolby, Sony and others) |
| Family | Audio | Audio |
| Compression | Lossy | Lossy |
| Opens in | Chrome, Firefox, Android, Discord, VLC; partial on Safari and iOS | iPhone, Android, Windows, macOS, VLC and most hardware players |
| Best for | voice messages and calls; streaming at low data rates | streaming and broadcast; radio and live audio |
Steps to convert OPUS to AAC
- Drop your OPUS file onto the converter, or click to choose it.
- Check that AAC is selected as the target format and adjust the options if you want.
- Press Convert, then save the new AAC file to your device when it finishes.
Tips for the best result
- Choose High for music you care about and Small for voice recordings.
- Convert from the original lossless file when you have one.
Frequently asked questions
How do I convert OPUS to AAC?
Drop your OPUS file on the converter, confirm that AAC is the target format and press Convert. When it finishes, press Save to device or download the AAC file. No account or software is needed.
Is the OPUS to AAC converter free?
Yes. It is free, with no watermark, no sign-up and no limit on how many files you convert. The site is supported by ads.
What should I know before converting OPUS to AAC?
Both formats are lossy, so converting costs a little extra quality. If you still have the original, convert from that. AAC output is a raw ADTS stream without a container, which plays in most players but stores no cover art. Choose M4A if you need tags.
Will the sound quality change when converting OPUS to AAC?
Both formats are lossy, so converting costs a little extra quality. If you still have the original, convert from that.
Which programs open AAC files?
AAC files open in iPhone, Android, Windows, macOS, VLC and most hardware players.
How large a file can I convert?
Up to 200 MB per file. Files are deleted from the server about 30 minutes after conversion, and no one looks at them.