Bulk MID to M4B Converter Online — Free HD Quality
Drag and drop your multiple MID files into this 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 — your original MID files are removed from our servers right after.
Drop images here or click to browse
PNG, JPG, WebP, GIF, HEIC, RAW, PSD, SVG and more
Max 100MB per file
MID vs M4B — File Format Comparison
| 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.
- 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
Related Converters
- Batch AC3 to ALAC converter
- How to turn AIFF into M4A?
- Process multiple AMR to PPM files
- CAF to MP3 converter
- Quick M4A to CAF online converter
- Free MP2 to TIFF - no account needed
- Batch MP3 to PAM converter
- Quick PCD to PDF online converter
- Quick PS to BMP online converter
- Change PSD files to CUR
- Get M4R from Raw Audio
- Export Raw Audio as PBM
- Convert multiple RMI to RAS at once
- Bulk convert TIFF to BMP
- All MID conversion options
- Convert other formats to M4B
- Explore Audio converters
- ConvertFlash converter tools