OPUS to AAC Converter
Convert OPUS files to AAC in seconds, right in your browser. Drop in one file or a whole folder, pick your quality settings and download - nothing is uploaded to a server.
Drop OPUS files here
MP3, WAV, FLAC, M4A, OGG, OPUS, AAC, AIFF, WMA, AMR, MP4, MOV & more · Processed on your device - nothing is uploaded
How to convert OPUS to AAC
- Click "Choose files" or drag your OPUS files onto the page.
- Make sure "AAC" is selected as the output format (192 kbps is a good default).
- Optionally click Edit to trim, adjust volume or add effects.
- Click Convert, then Download your AAC files.
Why convert OPUS to AAC?
AAC may be better supported by your device or app. To keep quality, choose a bitrate equal to or higher than the original OPUS.
AAC is best for streaming, broadcast and devices that need a raw AAC stream. Most phones, browsers, smart TVs and media players.
Will I lose quality?
Converting between two lossy formats re-encodes the audio, which can add a small amount of loss. Use a bitrate at least as high as the original (192 kbps or more) to keep it transparent.
OPUS vs AAC
| OPUS | AAC | |
|---|---|---|
| Full name | Opus Interactive Audio Codec | Advanced Audio Coding (ADTS) |
| Type | lossy | lossy |
| Best for | voice notes, WhatsApp/Discord audio, podcasts and streaming at small sizes | streaming, broadcast and devices that need a raw AAC stream |
| Typical size | ~0.9 MB at 128 kbps per minute | ~1.4 MB at 192 kbps per minute |
| Compatibility | All modern browsers, Android, iOS 17+, WhatsApp, Discord, Telegram and VLC. | Most phones, browsers, smart TVs and media players. |
| Developed by | IETF / Xiph.Org (2012) | MPEG (1997) |
OPUS to AAC: questions
How do I convert OPUS to AAC?
Open this page, add your OPUS file, make sure AAC is selected as the output format and click Convert. Your AAC file is ready to download in seconds.
Will converting OPUS to AAC lose quality?
Converting between two lossy formats re-encodes the audio, which can add a small amount of loss. Use a bitrate at least as high as the original (192 kbps or more) to keep it transparent.
Is this OPUS to AAC converter free and safe?
Yes. It's free with no watermark or sign-up. Files are processed locally in your browser, so your audio is never uploaded or stored on our servers.
Can I convert many OPUS files to AAC at once?
Yes - add up to 5 files at a time on the free plan (unlimited with Pro), convert them all with one click and download them as a ZIP.
What is the difference between OPUS and AAC?
OPUS (Opus Interactive Audio Codec) is a compressed (lossy) format, the most efficient modern lossy codec. Opus delivers excellent quality at very low bitrates for both speech and music. AAC (Advanced Audio Coding (ADTS)) is a compressed (lossy) format: raw AAC audio stream. The successor to MP3 used by YouTube, iPhone and digital radio.
Does it work on Mac, Windows, iPhone and Android?
Yes. The OPUS to AAC converter runs in any modern browser - Chrome, Safari, Edge or Firefox - on desktop and mobile. No software to install.