01
Reads the chapter table
The marks are already in your file. Chaptify reads them with ffprobe and cuts exactly there — never guessed from silence, never invented.
ffprobe · 300 marks max
One audiobook, separated into every chapter it already has.
Chaptify cuts your M4B or MP3 at its embedded chapter marks, packs the parts into one archive, and emails a link that expires. No account, no library, no copy kept.
- Accepts
- M4B · MP3
- Up to
- 1.6 GB · 30 h
- Link expires
- 12 h
- Cost
- Free
Chapter meter
5 marks · 2:43:26
Point at it to run the cut again — an illustration of a five-chapter file.
What comes back
one-audiobook.m4b 01_chapter.mp3 02_chapter.mp3 + 3 more chapters.zip
Named in playback order, so any folder-only player keeps the sequence.
Split your audiobook
Your audiobook is processed, then deleted with its archive after 12 hours. Only upload audiobooks you own or are authorised to process.
How it works
02
Cuts and packs in order
Every chapter becomes its own file, named so any player keeps the sequence, then archived into a single ZIP.
MP3 or M4B · 1.6 GB in
03
Sends one link, then forgets
The link arrives by email and works once you are ready for it. After twelve hours the archive and your upload are gone.
TTL 12 h · no account
Built for the players that refuse one long file
It started as a script for a running watch that would not play a ten-hour M4B. It runs on one machine, one job at a time, free — and it improves from the files people tell it about.