Bulk MID to M4B Converter Online — Free HD Quality
Drag and drop your multiple MID files into this 100% free online MID to M4B converter (.mid 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 — no signup and no downloads needed, and your original MID files are removed from our servers right after. Also see:Convert WMA to IPHONE.
Drop your MID files here to convert to M4B, or click to browse
Converts .mid to M4B (.m4b) in HD quality — bulk, free, no signup
Choose FilesMID vs M4B — File Format Comparison
See how MID and M4B compare across file extension, MIME type, compression, and feature support. Related:Quick MID to OPUS online converter.
| Feature | MID | M4B |
|---|---|---|
| File Extension | .mid | .m4b |
| MIME Type | audio/midi | audio/mp4 |
| Compression Type | Varies | Lossy |
| Metadata Support | Yes | Yes |
What Is MID Format?
MIDI File — Musical Instrument Digital Interface note-event data synthesised to audio using a soundfont; the .mid format is the universal standard for exchanging musical scores between DAWs, keyboards, and sequencers. See also:M4P to Android Audio conversion.
- Compression: Varies
- 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