# Can Mp3Tag convert between mp3 files and m4b and vice versa?
**URL:** https://community.mp3tag.de/t/can-mp3tag-convert-between-mp3-files-and-m4b-and-vice-versa/62188
**Category:** Support
**Created:** [September 24, 2023, 12:59am UTC](https://community.mp3tag.de/t/can-mp3tag-convert-between-mp3-files-and-m4b-and-vice-versa/62188 "2023-09-24T00:59:26Z")
**Posts on this page:** 4
**Page:** 1
### Author:  [@nhan](https://community.mp3tag.de/u/nhan)
#### Post date: [September 24, 2023, 12:59am UTC](https://community.mp3tag.de/t/can-mp3tag-convert-between-mp3-files-and-m4b-and-vice-versa/62188/1 "2023-09-24T00:59:26Z")
Sorry for such a noob question. I've spent the last few hours searching around the internet + docs + the forum and still don't really understand what mp3Tag does although I can see that people recommend it a lot.
I think my need is quite simple:
- combine a bunch of mp3 files into 1 m4b file.
- split 1 m4b file into multiple mp3 files.
- edit the chapter name.
- add new chapter/edit the chapter timestamp without re-encoding the file.
Please give me instructions or links to the relevant docs if possible. Thanks a lot!
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### Author:  [@MotleyG](https://community.mp3tag.de/u/MotleyG)
#### Post date: [September 24, 2023, 1:41am UTC](https://community.mp3tag.de/t/can-mp3tag-convert-between-mp3-files-and-m4b-and-vice-versa/62188/2 "2023-09-24T01:41:16Z")
The function of mp3tag is to add and edit metadata information that is embedded in most music files, along with a few other formats. It does not edit or convert the actual music files themselves.
Chapter name editing is possible, however those chapters must already exist. Again, mp3tag is the tag editor, it does not manipulate the audio or video streams within those files.
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### Author:  [@ohrenkino](https://community.mp3tag.de/u/ohrenkino)
#### Post date: [September 24, 2023, 6:25am UTC](https://community.mp3tag.de/t/can-mp3tag-convert-between-mp3-files-and-m4b-and-vice-versa/62188/3 "2023-09-24T06:25:47Z")
> [@nhan](#):
>
> still don't really understand what mp3Tag does
> ...
> Please give me instructions or links to the relevant docs if possible
Here is an overview of MP3tag's functions:
> **[Overview – Mp3tag Documentation](https://docs.mp3tag.de/getting-started/overview/)**
>
> General description about Mp3tag, the design philosophy and the intention of this documentation. Mp3tag is the universal Tag Editor.
and see also here:
> [@Adding chapter markers to audio and video files](https://community.mp3tag.de/t/adding-chapter-markers-to-audio-and-video-files/62009):
>
> I'm currently researching how to embed chapter information inside audio and video files, so that they still work when playing a file standalone. Can a chapter index be written to the ID3 metadata?
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### Author:  [@system](https://community.mp3tag.de/u/system)
#### Post date: [February 9, 2026, 12:30pm UTC](https://community.mp3tag.de/t/can-mp3tag-convert-between-mp3-files-and-m4b-and-vice-versa/62188/4 "2026-02-09T12:30:09Z")