AC3 to OPUS Converter
Convert AC3 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 AC3 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 AC3 to OPUS
- Click "Choose files" or drag your AC3 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 AC3 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 AC3.
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.
AC3 vs OPUS
| AC3 | OPUS | |
|---|---|---|
| Full name | Dolby Digital (AC-3) | Opus Interactive Audio Codec |
| Type | lossy | lossy |
| Best for | DVD authoring, home theatre and video production | voice notes, WhatsApp/Discord audio, podcasts and streaming at small sizes |
| Typical size | ~2.9 MB at 384 kbps per minute | ~0.9 MB at 128 kbps per minute |
| Compatibility | DVD/Blu-ray players, AV receivers, smart TVs, VLC. | All modern browsers, Android, iOS 17+, WhatsApp, Discord, Telegram and VLC. |
| Developed by | Dolby Laboratories (1991) | IETF / Xiph.Org (2012) |
AC3 to OPUS: questions
How do I convert AC3 to OPUS?
Open this page, add your AC3 file, make sure OPUS is selected as the output format and click Convert. Your OPUS file is ready to download in seconds.
Will converting AC3 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 AC3 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 AC3 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 AC3 and OPUS?
AC3 (Dolby Digital (AC-3)) is a compressed (lossy) format, dolby Digital surround-sound audio used on DVDs, Blu-rays and TV broadcasts. 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 AC3 to OPUS converter runs in any modern browser - Chrome, Safari, Edge or Firefox - on desktop and mobile. No software to install.