OPUS to AIFF Converter

Convert OPUS to AIFF Online

Turn a .opus file — usually a voice note, a web-audio clip, or a WhatsApp/Discord/Telegram recording — into an AIFF (.aif) file that Mac and pro-audio software will open without complaint. This converter fully decodes the compressed Opus stream into uncompressed PCM inside the AIFF container, which is exactly what Logic Pro's sampler, GarageBand, Pro Tools, and hardware samplers expect. The honest trade-off, spelled out below: the AIFF comes out much larger than the Opus without sounding any better — you are unlocking compatibility, not gaining fidelity. If you just want to play or edit the audio, Opus to WAV and Opus to MP3 are usually the better targets.

How to Convert OPUS to AIFF

1. Upload Your OPUS File: Drag and drop your .opus file onto the page, or click "Add Files" to browse. Queue several voice notes or clips and they all run with the same settings.
2. Leave the Audio Codec on the AIFF Default: Under "Show All Options," the Audio Codec defaults to PCM 16-bit Big Endian — standard uncompressed audio inside the AIFF container, which is what samplers and DAWs expect. You can switch to PCM A-law / mu-law for a smaller telephony-style file, but plain PCM is the safe, importable choice.
3. Set Audio Sample Rate, Audio Channel, or Trim (Optional): Audio Sample Rate and Audio Channel both sit on Original, copying the source layout — leave them unless your project needs a specific rate or you want to collapse a mono recording to one channel. Use Trim to keep only part of a long recording.
4. Convert and Download: Click Convert and save your .aif file individually or as a ZIP. No sign-up, no watermark.

OPUS vs AIFF at a Glance

Frequently Asked Questions

Why convert Opus to AIFF instead of just opening the .opus directly?

Because a lot of Mac and pro-audio software won't read .opus out of the box. Audacity, for example, refuses Opus files until you install the separate FFmpeg Import/Export library, and Logic Pro's sampler was built around the AIFF family — AIFF (and WAV) are what load cleanly into the EXS24 / Quick Sampler, while bare .opus often does not. AIFF is part of the long-established Audio Interchange File Format that virtually every Mac and DAW imports natively, so converting gets your voice note or clip into the project without chasing down codecs.

Will the AIFF sound better than the original Opus?

No, and that is an honest limit rather than a tool flaw. Opus is lossy, so it has already discarded inaudible (and, at low voice-note bitrates, some audible) detail during recording. Decoding it to uncompressed PCM inside an AIFF reproduces that audio faithfully but cannot rebuild what was thrown away. You get a file that is much larger — PCM is uncompressed — carrying exactly the quality the Opus already had. That clean, lossless working copy is precisely what you want for sampling or editing, even though it is not an upgrade in fidelity.

Why is my AIFF file so much bigger than the Opus?

Because this converter writes uncompressed PCM into the AIFF by default. Opus is highly compressed — a one-minute voice note can be a few hundred kilobytes — whereas AIFF runs about 10 MB per minute for 16-bit/44.1 kHz stereo. The size jump is the cost of an uncompressed, editor-friendly format, not a setting you can tune away. In our testing, a 60-second 16 kHz mono Opus voice note (about 480 kB) decoded to a roughly 5 MB 16-bit PCM AIFF — larger, but bit-for-bit ready for a sampler. If you would rather keep things small, convert to a lossy format like Opus to MP3 instead.

Is .aif the same as .aiff, and what about .aifc?

Yes — .aif and .aiff are the same Audio Interchange File Format; the three-letter spelling is a holdover from the old DOS/Windows 8.3 filename limit, while macOS tends to write the four-letter .aiff. Both hold the same uncompressed PCM inside IFF chunks and behave identically. The related .aifc is AIFF-C, a variant that can store compressed payloads; if a tool specifically asks for that cousin, use Opus to AIFF-C instead. Plain AIFF, which this page produces, is always uncompressed.

Should I leave the codec on PCM, or pick A-law / mu-law?

Leave it on PCM 16-bit Big Endian for the widest compatibility — it is the standard AIFF payload that samplers and DAWs expect. Choose PCM A-law or mu-law only if you are feeding a telephony or legacy speech application that specifically wants those; they roughly halve the data rate but reduce dynamic range, so they are the wrong choice for music or sampling. There is no "higher quality" setting here that recovers what Opus compressed away — raising the bit depth only makes the file larger.

How are my files handled, and how long are they kept?

Files are uploaded over an encrypted connection, processed on our servers, and deleted automatically a few hours after conversion — no sign-up, no watermark, never shared or made public. If you later need to go the other way and squeeze an AIFF back down into an efficient web-ready file, use the reverse tool, AIF to Opus.