Step 1: Provide your AIFF 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 Opus files.
AIFF to Opus Conversion FAQ
How do I convert AIFF audio to Opus without losing quality?
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Upload the AIFF file and the converter chooses the Opus codec / bitrate combination that matches the source profile. Lossless Opus (WAV / FLAC / ALAC) preserves every sample exactly; lossy Opus (MP3 / AAC / OGG / Opus) defaults to 192 kbps which is transparent for almost all music content. AIFF stores uncompressed big-endian PCM — the Apple-side equivalent of WAV, with the same bit-for-bit fidelity. Opus scales from 6 kbps mono speech to 510 kbps stereo music in the same bitstream and switches modes automatically.
How much quality do I lose converting AIFF to Opus?
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Some, and it is permanent — this is the one direction where information is genuinely thrown away. AIFF holds every sample exactly; Opus discards what a psychoacoustic model predicts you will not hear. At 192 kbps and above that prediction is good enough to be transparent on most material and most equipment. Keep the AIFF as your master, because you cannot get back to it from the Opus.
What bitrate does the Opus file end up at?
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Default 192 kbps for lossy Opus; pass-through for lossless Opus. 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 AIFF to Opus actually reduce my audio quality?
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If AIFF is lossy (MP3, AAC) and Opus is lossless (WAV, FLAC), the Opus is no better than the AIFF — you cannot recover information already discarded by the lossy AIFF codec. If AIFF is lossless and Opus is lossy, expect the Opus encoder to recompress; at 192 kbps the loss is imperceptible to most ears.
Does the AIFF to Opus 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 AIFF container and written into the equivalent fields on the Opus container. ID3v2 (MP3), Vorbis comments (OGG, FLAC), MP4 atoms (AAC, M4A), RIFF INFO (WAV), iXML chunks all map cleanly. Opus is an IETF standard from 2012 that merged Skype’s SILK speech codec with Xiph’s CELT music codec into one design.
Can I batch-convert hundreds of AIFF files into Opus?
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Yes — drop a folder of AIFF 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 Opus keep the same sample rate as the AIFF?
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By default yes (a 48 kHz AIFF produces 48 kHz Opus, a 44.1 kHz AIFF produces 44.1 kHz Opus). For specific compatibility — e.g. downsampling 96 kHz studio masters to 44.1 kHz Opus for CD burning, or upsampling 22 kHz voicemail to 44.1 kHz Opus — the sample-rate dropdown applies high-quality SOX-style resampling.
Can I normalize loudness in the AIFF to Opus step?
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Yes — the loudness-normalize option applies ITU-R BS.1770 / EBU R128 normalization to the Opus 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 Opus playlist.
Will the Opus 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 Opus codec for the platform you specify. Opus is the best-sounding lossy codec at low bitrates by a clear margin, and it powers WhatsApp voice notes, Discord and WebRTC. Opus is almost never supported by standalone hardware — assume software playback only, and expect car stereos to ignore it.
Is my AIFF file private during conversion?
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Yes — uploaded AIFF 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 AIFF to Opus 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 AIFF -> Opus finishes in 6-12 minutes on the standard pipeline.
Why is the Opus file louder or quieter than the AIFF 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 Opus sounds bit-identical to the AIFF (for lossless) or perceptually identical (for transparent lossy).
