Bulk M4B to AIF Converter Online — Free HD Quality
Drag and drop your multiple M4B files into this 100% free online M4B to AIF converter (.m4b to .aif), and click the Convert button to bulk convert them to AIF format in HD quality. Use the quality slider to fine-tune your AIF output, then download your converted files one by one or as a single ZIP — no signup and no downloads needed, and your original M4B files are removed from our servers right after. Also see:APE to MP3 - free, no signup.
Drop your M4B files here to convert to AIF, or click to browse
Converts .m4b to AIF (.aif) in HD quality — bulk, free, no signup
Choose FilesM4B vs AIF — File Format Comparison
See how M4B and AIF compare across file extension, MIME type, compression, and feature support. Related:Change M4B to MP2.
| Feature | M4B | AIF |
|---|---|---|
| File Extension | .m4b | .aif |
| MIME Type | audio/mp4 | audio/aiff |
| Compression Type | Lossy | Lossless |
| Metadata Support | Yes | Yes |
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. See also:Turn M4B into ALAC.
- Compression: Lossy
- Tags & Metadata: Supported
What Is AIF Format?
Audio Interchange File Format (short extension) — the .aif variant of AIFF used by older Apple software and some DAWs; functionally identical to .aiff with the same uncompressed PCM quality.
- Compression: Lossless
- Tags & Metadata: Supported