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Bulk OPUS to M4A Converter Online — Free HD Quality

Drag and drop your multiple OPUS files into this free online OPUS to M4A converter (.opus to .m4a), and click the Convert button to bulk convert them to M4A format in HD quality. Use the quality slider to fine-tune your M4A output, then download your converted files one by one or as a single ZIP — your original OPUS files are removed from our servers right after.

To:
85%

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Max 100MB per file

OPUS vs M4A — File Format Comparison

Feature OPUS M4A
File Extension .opus .m4a
MIME Type audio/opus audio/mp4
Compression Type Lossy Lossy
Metadata Support Yes Yes

What Is OPUS Format?

Opus — the IETF standard for internet voice and music streaming; outperforms MP3, AAC, and Vorbis at every bitrate, and is the default codec for WebRTC, Discord, and Spotify Connect.

  • Compression: Lossy
  • Tags & Metadata: Supported

What Is M4A Format?

MPEG-4 Audio — AAC audio in an MP4 container, the standard format for Apple Music, iTunes purchases, and iPhone voice memos, offering better quality than MP3 at equivalent bitrates.

  • Compression: Lossy
  • Tags & Metadata: Supported

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