Step 1: Provide your Opus files using the button above or by toss and let go.
Step 2: Click the 'Convert' button to start the conversion.
Step 3: Fetch your converted AIFF files.
Opus to AIFF Conversion FAQ
How do I convert Opus audio to AIFF without losing quality?
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Upload the Opus file and the converter chooses the AIFF codec / bitrate combination that matches the source profile. Lossless AIFF (WAV / FLAC / ALAC) preserves every sample exactly; lossy AIFF (MP3 / AAC / OGG / Opus) defaults to 192 kbps which is transparent for almost all music content. Opus scales from 6 kbps mono speech to 510 kbps stereo music in the same bitstream and switches modes automatically. AIFF stores uncompressed big-endian PCM — the Apple-side equivalent of WAV, with the same bit-for-bit fidelity.
Does converting Opus to AIFF improve the audio quality?
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No, and it is worth being blunt: nothing can. The Opus already discarded detail during its original encode, and wrapping what remains in a lossless AIFF preserves exactly that — no more. The file gets several times larger and sounds identical. It is still the right move before editing, because AIFF will not add a second generation of artefacts when you export. AIFF is the studio interchange format on macOS, handles metadata better than plain WAV, and imports into Logic and Pro Tools instantly. Opus is almost never supported by standalone hardware — assume software playback only, and expect car stereos to ignore it.
What bitrate does the AIFF file end up at?
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Default 192 kbps for lossy AIFF; pass-through for lossless AIFF. Override to 320 kbps if you want maximum lossy fidelity, 128 kbps for size-constrained podcast distribution, or 96 kbps for voice-only sources where the smaller file matters more than studio detail.
Will going from Opus to AIFF actually reduce my audio quality?
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If Opus is lossy (MP3, AAC) and AIFF is lossless (WAV, FLAC), the AIFF is no better than the Opus — you cannot recover information already discarded by the lossy Opus codec. If Opus is lossless and AIFF is lossy, expect the AIFF encoder to recompress; at 192 kbps the loss is imperceptible to most ears.
Does the Opus to AIFF converter keep ID3 / metadata tags?
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Yes — title, artist, album, year, track number, album art, BPM, replay-gain are read from the Opus container and written into the equivalent fields on the AIFF container. ID3v2 (MP3), Vorbis comments (OGG, FLAC), MP4 atoms (AAC, M4A), RIFF INFO (WAV), iXML chunks all map cleanly. AIFF is Apple’s Audio Interchange File Format from 1988, built on the same IFF chunk design as AVI’s RIFF.
Can I batch-convert hundreds of Opus files into AIFF?
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Yes — drop a folder of Opus files in and we process them in parallel. Premium has more parallel workers and no per-file size cap, so a 500-file batch finishes in minutes rather than tens of minutes. Folder structure is preserved in the output ZIP.
Will the AIFF keep the same sample rate as the Opus?
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By default yes (a 48 kHz Opus produces 48 kHz AIFF, a 44.1 kHz Opus produces 44.1 kHz AIFF). For specific compatibility — e.g. downsampling 96 kHz studio masters to 44.1 kHz AIFF for CD burning, or upsampling 22 kHz voicemail to 44.1 kHz AIFF — the sample-rate dropdown applies high-quality SOX-style resampling.
Can I normalize loudness in the Opus to AIFF step?
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Yes — the loudness-normalize option applies ITU-R BS.1770 / EBU R128 normalization to the AIFF output, targeting -14 LUFS (streaming standard) or -16 LUFS (podcast standard) or a custom value. Useful when batch-converting tracks with varying mastering levels into a single AIFF playlist.
Will the AIFF play on my car stereo / iPod / Sonos / Bluetooth speaker?
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MP3 plays universally on every device made in the last 20 years. AAC plays on Apple, most Android, Sonos, and modern car stereos. FLAC plays on Sonos and recent Android, less well on older iPods. WAV plays on everything but the file is huge. The device-target dropdown picks a safe AIFF codec for the platform you specify. AIFF is as large as WAV with worse support outside the Apple world, so it is a poor choice for distribution.
Is my Opus file private during conversion?
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Yes — uploaded Opus files are processed in isolated workers and deleted within minutes. We never play, store, or share the audio content. The pipeline runs on hardware we control end-to-end; no third-party services receive your file.
How long does converting a 1-hour Opus to AIFF take?
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Same-codec re-mux (e.g. AAC inside M4A -> AAC inside MP4): 10-30 seconds. Codec change (e.g. FLAC -> MP3 or WAV -> AAC): typically 10-20% of source duration, so a 1-hour Opus -> AIFF finishes in 6-12 minutes on the standard pipeline.
Why is the AIFF file louder or quieter than the Opus source?
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No automatic gain change happens unless the normalize option is turned on. If you do hear a level shift, your audio player or media library may be applying ReplayGain or per-track normalization on playback — turn that off and the AIFF sounds bit-identical to the Opus (for lossless) or perceptually identical (for transparent lossy).
