How to convert Opus to Apple Lossless (ALAC)
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Upload your file
Drag and drop a file or click to select one. Keep this page open while the file uploads and converts.
- 2
Convert Opus to Apple Lossless (ALAC)
NexMedia converts Opus to Apple Lossless (ALAC) on its own servers. Processing time depends on the file size and how busy the queue is.
- 3
Download the converted file
When the conversion finishes, the download appears on this page. Your converted file is kept for 2 hours, then deleted.
About Opus
Opus is an open, royalty-free lossy audio codec standardised by the IETF in 2012 (RFC 6716). It handles both speech and music well, from very low to high bitrates.
Voice and video calls, WhatsApp voice messages, WebRTC, and the audio track of WebM videos.
Opus always decodes at 48 kHz, and some older players and devices do not support it.
Convert Opus to ALAC online free, no account required — ALAC is Apple's lossless audio codec.
Change Opus to ALAC without losing quality — convert Opus to ALAC free in your browser.
Why won't my car stereo or older phone play Opus files? The codec only became widespread in the last decade, and hardware that predates it usually decodes just MP3 — converting keeps the music compatible.
About Apple Lossless (ALAC)
Apple Lossless (ALAC) is Apple's lossless audio codec, usually stored in an .m4a file; Apple released it as open source in 2011.
Lossless music in iTunes, Apple Music and on iPhones.
ALAC files are smaller than WAV but several times larger than AAC, and many devices outside Apple's prefer FLAC.
Why convert a CD to ALAC? You keep every sample of the original at half the WAV size, and it syncs and plays inside the Apple ecosystem untouched.
What changes when you convert Opus to ALAC
- The audio is decoded and re-encoded as ALAC at the default settings, so the result is close to the Opus but not bit-identical.
- Opus is a lossy format and ALAC is not: the ALAC keeps the decoded Opus exactly, but it cannot restore detail the Opus compression already removed, and the file is usually larger.
Settings you can change
Before you convert Opus to ALAC, you can adjust: Audio codec, Rate control, Audio bitrate, Quality (VBR), Sample rate, Channels, Normalize loudness, Trim start, Trim duration, and Keep tags.
Limits
Each plan sets a maximum file size and a number of conversions per day, and video and audio files also have a maximum length. Guests can convert files up to 100 megabytes and 5 per day; a free account raises this to 500 megabytes and 25 per day; paid plans go up to 100 gigabytes.
Your converted ALAC file is kept for 2 hours, then deleted.
Opus to ALAC: questions and answers
Does converting Opus to ALAC reduce quality?
The audio is decoded and re-encoded as ALAC at the default settings, so the result is close to the Opus but not bit-identical. Opus is a lossy format and ALAC is not: the ALAC keeps the decoded Opus exactly, but it cannot restore detail the Opus compression already removed, and the file is usually larger.
What is the difference between Opus and ALAC?
Opus is a modern open lossy codec for speech and music. ALAC is Apple's lossless audio codec.
Can I change the settings when converting Opus to ALAC?
Before you convert Opus to ALAC, you can adjust: Audio codec, Rate control, Audio bitrate, Quality (VBR), Sample rate, Channels, Normalize loudness, Trim start, Trim duration, and Keep tags.
Do I need an account to convert Opus to ALAC?
No. You can convert Opus to ALAC without an account; signing in raises the file-size and daily limits.
How long is my converted ALAC file kept?
The ALAC file you convert from Opus is kept for 2 hours, then deleted automatically.
Does converting Opus to ALAC restore the quality the Opus lost?
Opus is a lossy format and ALAC is not: the ALAC keeps the decoded Opus exactly, but it cannot restore detail the Opus compression already removed, and the file is usually larger.
When I convert Opus to ALAC, is the audio re-encoded?
The audio is decoded and re-encoded as ALAC at the default settings, so the result is close to the Opus but not bit-identical.