.f4b file: how to open it on Windows
1 Windows app registers the .f4b extension. Install one of them to open the file with a double-click.
About the format
- Format
- MPEG-4 audio book
- MIME type
- audio/x-m4b
Format data: freedesktop.org shared-mime-info and PRONOM (The National Archives, UK).
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Subtitle Speech SynchronizerAutomatic subtitle synchronisation app
Related guide: Change the default app for a file type in Windows