AAC to OPUS Converter
Convert AAC files to OPUS 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 AAC 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 AAC to OPUS
- Click "Choose files" or drag your AAC files onto the page.
- Make sure "OPUS" is selected as the output format (128 kbps is a good default).
- Optionally click Edit to trim, adjust volume or add effects.
- Click Convert, then Download your OPUS files.
Why convert AAC to OPUS?
OPUS may be better supported by your device or app. To keep quality, choose a bitrate equal to or higher than the original AAC.
OPUS is best for voice notes, WhatsApp/Discord audio, podcasts and streaming at small sizes. All modern browsers, Android, iOS 17+, WhatsApp, Discord, Telegram and VLC.
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.
AAC vs OPUS
| AAC | OPUS | |
|---|---|---|
| Full name | Advanced Audio Coding (ADTS) | Opus Interactive Audio Codec |
| Type | lossy | lossy |
| Best for | streaming, broadcast and devices that need a raw AAC stream | voice notes, WhatsApp/Discord audio, podcasts and streaming at small sizes |
| Typical size | ~1.4 MB at 192 kbps per minute | ~0.9 MB at 128 kbps per minute |
| Compatibility | Most phones, browsers, smart TVs and media players. | All modern browsers, Android, iOS 17+, WhatsApp, Discord, Telegram and VLC. |
| Developed by | MPEG (1997) | IETF / Xiph.Org (2012) |
AAC to OPUS: questions
How do I convert AAC to OPUS?
Open this page, add your AAC file, make sure OPUS is selected as the output format and click Convert. Your OPUS file is ready to download in seconds.
Will converting AAC to OPUS 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 AAC to OPUS 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 AAC files to OPUS 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 AAC and OPUS?
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. 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.
Does it work on Mac, Windows, iPhone and Android?
Yes. The AAC to OPUS converter runs in any modern browser - Chrome, Safari, Edge or Firefox - on desktop and mobile. No software to install.