M4B converter
Convert M4B files to 17 other formats, or turn 41 other formats into M4B. Everything runs in your browser — drop a file in and pick where it should end up.
Drop your M4B files here
or browse your device · paste with Ctrl+V
Accepts .m4b. Choose any output format from the menu on each row.
Your files never leave this device — there is no upload and no server to delete them from.
M4B
MPEG-4 AudiobookAn M4A that flags itself as an audiobook, so players remember your position and honour chapter markers. Audible titles land here once stripped of DRM.
- Developed by
- Apple
- Released
- 2003
- Extension
- .m4b
- MIME type
- audio/mp4
- Compression
- Lossy
- Readable directly in your browser.
- Can be written directly in your browser.
- 17 outgoing and 41 incoming conversions available.
- 01
Add M4B files
Drop them on the box above. Batches are fine — each file gets its own row and its own settings.
- 02
Pick an output format
The menu on each row lists every format this file can become, grouped by category and searchable.
- 03
Convert and save
Everything happens locally. Download the files individually, or grab the whole batch as a ZIP.