Convert Opus Audio Codec (.opus) to Audio Interchange File Format (.aiff) online for free. Fast, secure audio conversion with no watermarks or registration.
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AIFF (Audio Interchange File Format) is Apple's uncompressed audio standard, storing raw PCM samples in a container developed by Apple in 1988 based on Electronic Arts' IFF format. Converting Opus audio — the modern codec behind Discord, WebRTC, and streaming platforms — to AIFF produces an uncompressed file ready for professional audio editing in Logic Pro, GarageBand, Pro Tools, and other DAWs on macOS.
Opus operates at 48 kHz internally with algorithmic complexity that rivals the best audio codecs ever created. When decoded to AIFF, the full PCM representation of the Opus audio is captured at CD quality (16-bit, 44.1 kHz) or higher (24-bit, 48 kHz), providing a lossless working copy for editing and mastering. The resulting AIFF file is significantly larger — approximately 10 MB per minute at CD quality — but integrates seamlessly with Apple's professional audio ecosystem.
Professional audio editors on macOS work fastest with uncompressed formats. Logic Pro, GarageBand, and Final Cut Pro load AIFF files instantly without any decoding overhead, and every edit, effect, and export from AIFF avoids the generational quality loss that comes from re-encoding compressed formats. If you recorded a podcast interview via Discord (which uses Opus internally) or captured audio from a WebRTC session, converting to AIFF before editing gives you the cleanest possible working copy.
AIFF is also the standard delivery format for sound effects libraries, broadcast audio, and sample packs in the Apple ecosystem. If your Opus recordings need to be integrated into a commercial project, delivered to a client, or archived in a professional audio library, AIFF is the expected format on macOS-based production houses.
FFmpeg decodes the Opus stream using libopus (typically 48 kHz, mono or stereo) and writes linear PCM audio (signed 16-bit or 24-bit big-endian) into the AIFF container. The default output is 16-bit at 44.1 kHz stereo, producing approximately 10.6 MB per minute. For 24-bit/48 kHz output (matching Opus's native sample rate), the file grows to approximately 16.6 MB per minute. The AIFF container supports embedded metadata including title, artist, and comment fields.
The AIFF output is a perfect PCM representation of the decoded Opus audio. No additional quality loss occurs during this step — the only artifacts present are those from the original Opus encoding. At 48 kHz output, the conversion preserves the native Opus sample rate without any resampling, which is technically ideal. The resulting file can be edited, processed, and re-exported without any generational loss.
| Device | Opus | AIFF |
|---|---|---|
| Windows PC | Partial | Partial |
| macOS | Partial | Partial |
| iPhone/iPad | Partial | Partial |
| Android | Partial | Partial |
| Linux | Partial | Partial |
| Web Browser | No |
Resolution: N/A
Bitrate: 320 kbps
OGG Vorbis preferred
Resolution: N/A
Bitrate: 256 kbps
AAC format required
Resolution: N/A
Bitrate: 128 kbps
Lossless FLAC/WAV for best quality
Resolution: N/A
Bitrate: 128 kbps
MP3 mono for spoken word
Converting Opus to AIFF is the professional path for bringing internet-age audio into Apple's production ecosystem. The uncompressed output integrates natively with every macOS audio tool and provides a lossless working copy that withstands repeated editing without degradation.
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| No |
| Funktion | Opus | AIFF |
|---|---|---|
| Fulde navn | Opus Audio Codec | Audio Interchange File Format |
| Filendelse | .opus | .aiff |
| Bedst til | Low latency | Lossless quality |