Skip to content
All audio conversions

OPUS to AIFF converter

Convert OPUS to AIFF in your browser. No upload and no account: the file never leaves your device, so the only size limit is your device’s memory.

I want AIFF
Advanced 4
sec

Leave both at 0 for the whole file.

sec
Channels

Bytes of your files sent anywhere: 0 B

Related conversions

Need it the other way round? Convert AIFF to OPUS

Other ways to convert OPUS

Convert other formats to AIFF

Read more about the OPUS format and the AIFF format, or see every audio tool and all audio conversions.

Should you convert OPUS to AIFF?

Only when software insists on AIFF. It stores the decoded OPUS perfectly, but the detail the OPUS discarded is already gone, so the AIFF is bigger without sounding better.

AIFF also plays in more places: Macs, iPhones and pro audio software; some Windows and web apps prefer WAV.

OPUS is the most efficient audio codec in common use, especially for speech; AIFF is uncompressed audio, Apple’s equivalent of WAV. Use AIFF for editing in Mac audio software, or when a Mac workflow asks for it.

OPUS and AIFF compared
Property OPUS AIFF
Compression Lossy Uncompressed
Typical quality 24–128 kbps 16-bit PCM
Support Has patchy support Opens almost everywhere
Best for Voice notes, calls and streaming at low bitrates Audio production on Macs, and importing into Logic or GarageBand
Introduced 2012 1988

How to convert OPUS to AIFF

  1. 01

    Add your OPUS

    Drop your OPUS file onto the box, or click to choose it. It is read from your disk and stays there.

  2. 02

    Check the settings

    The output is already set to AIFF. Change the bitrate if you want to; the defaults suit most files.

  3. 03

    Save the AIFF

    Press convert and save the AIFF. Several files come back together as a ZIP.

What changes when OPUS becomes AIFF

Bigger, not better

AIFF can’t restore what OPUS compression removed. It does make editing easier and stops further loss, which is why editors and some broadcast systems ask for it.

Who needs AIFF

Use AIFF for editing in Mac audio software, or when a Mac workflow asks for it.

Expect a much larger file

AIFF is far bigger for the same content. Choose it because something needs AIFF, not to send or store the file. OPUS: A minute of voice note is often under 200 KB. AIFF: About 10 MB a minute at CD quality.

This page is put together from our notes on each format, choosing only what is true of OPUS and AIFF, so every pairing states the same facts the same way. How these pages are made.

Why it doesn’t upload

Recordings are often private: interviews, voice notes, unreleased music. Your browser can decode and encode audio itself, so there is no reason to send it anywhere.

How to check for yourself

Worth knowing

  • About the OPUS. WhatsApp voice notes exported from a phone are Opus files, sometimes named .ogg, which many players and transcription services refuse.
  • About the AIFF. AIFF stores samples in the opposite byte order to WAV; tools that assume WAV turn it into loud static.
  • MP3, WAV, M4A, OGG, Opus and FLAC are converted by your browser directly. WMA, AMR, APE, AC3 and the other specialist formats use the FFmpeg engine, a one-time 31 MB download.

Questions

Does converting OPUS to AIFF lose quality?

No quality is lost converting to AIFF, though it can’t restore what the OPUS already discarded.

Will an AIFF play in my car or on my phone?

AIFF opens almost everywhere: Macs, iPhones and pro audio software; some Windows and web apps prefer WAV.

Other tools