File Converter

Opus to AIFF converter Free, private, no upload.

Convert Opus files to AIFF right in your browser. AIFF is uncompressed and preferred by Logic Pro, GarageBand and other Mac audio software. Your files are never uploaded.

or drop files anywhere · paste with Ctrl/⌘ + V

How to convert Opus to AIFF

  1. 1 Drop your Opus files onto the page, or click “Choose files”. You can add many at once, or a whole folder.
  2. 2 AIFF is already selected as the output. Optionally open Options to adjust sample rate, channels, normalise loudness.
  3. 3 Click Convert, then Save. Converting several files? Save them all as one ZIP.

About the formats

Opus · Opus audio

Opus is a modern open audio codec with excellent quality at low bitrates. WhatsApp voice messages and many VoIP apps use it.

AIFF · Audio Interchange File Format

AIFF is Apple’s uncompressed audio format, the Mac equivalent of WAV, used in music production.

The conversion runs on your device using FFmpeg compiled to WebAssembly. You can adjust: sample rate, channels, normalise loudness, start at, end at.

Frequently asked questions

How do I convert Opus to AIFF?

Drop your Opus files onto the page, or click “Choose files”. You can add many at once, or a whole folder. AIFF is already selected as the output. Optionally open Options to adjust sample rate, channels, normalise loudness. Click Convert, then Save. Converting several files? Save them all as one ZIP.

Are my files uploaded to a server?

No. The conversion runs entirely in your browser using WebAssembly. Your files never leave your device, so it is safe for private photos, contracts and business data. Once the page has loaded it even works offline.

Will converting Opus to AIFF reduce quality?

No further quality is lost: AIFF stores the result losslessly. It cannot restore detail that was already discarded when the Opus file was created.

Can I convert multiple Opus files to AIFF at once?

Yes. Add as many Opus files as you like; they are converted in parallel on your device and you can download them all as a single ZIP.

Is it free? Are there limits?

It is free, with no sign-up, no watermark and no daily limits. Because nothing is uploaded there is no upload size limit either; the only limit is your device’s memory, which matters mostly for very large videos.

See everything the Opus converter and the AIFF converter can do.