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Bulk AIFC to M4B Converter Online — Free HD Quality

Drag and drop your multiple AIFC files into this free online AIFC to M4B converter (.aifc to .m4b), and click the Convert button to bulk convert them to M4B format in HD quality. Use the quality slider to fine-tune your M4B output, then download your converted files one by one or as a single ZIP — your original AIFC files are removed from our servers right after.

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Max 100MB per file

AIFC vs M4B — File Format Comparison

Feature AIFC M4B
File Extension .aifc .m4b
MIME Type audio/x-aifc audio/mp4
Compression Type Lossy Lossy
Metadata Support Yes Yes

What Is AIFC Format?

Compressed AIFF — an extension of AIFF that supports compressed audio codecs (SOWT, ulaw, alaw, MAC3) inside the AIFF container, used in legacy Apple and SGI audio workflows.

  • Compression: Lossy
  • Tags & Metadata: Supported

What Is M4B Format?

MPEG-4 Audiobook — AAC audio in an MP4 container with bookmarking support, the standard format for audiobooks on Apple Books, Audible exports, and iPhone podcasts.

  • Compression: Lossy
  • Tags & Metadata: Supported

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