Audiobook File Merger
Merge multiple audiobook files into one single audiobook in your browser. Reorder chapters, set a book title, and export one merged MP3 or M4B file without uploading anything.
Merge your audiobook files
Add multiple audiobook files, set the order, and export one merged audiobook. The first run downloads the browser audio engine.
Output format
Selected output: M4B. M4B is the better audiobook container. MP3 is useful when another player only handles MP3 well.
Merge queue
0 filesWhat this merger is good for
- Merge chapter files into one single audiobook for simpler imports and playback.
- Reorder tracks before export when folder order or track numbers are messy.
- Export to M4B for audiobook workflows or MP3 for broader player compatibility.
Current limits
This first version focuses on merging and re-encoding audio, not preserving every embedded tag from every source file.
Very large audiobook jobs can take time because everything runs locally in your browser with FFmpeg WASM.
M4B output is the better choice when you want a true audiobook-style container after merging.
Merge log
Use this to monitor browser-side processing during longer audiobook merges.
No merge logs yet.
Free Online Audiobook File Merger
Audiobooky's audiobook file merger is designed for people who have a multi-file audiobook and want one simpler output file. It works well for merging chapter MP3s into one audiobook, creating a single M4B for import into another app, or building one clean download for easier playback and archiving.
Can this merge multiple MP3 audiobook files into one file?
Yes. Add multiple audiobook files, set the order, and export one merged audiobook as MP3 or M4B directly in your browser.
Does the merger upload my audiobook files anywhere?
No. The merge workflow runs locally in your browser, so the audiobook files stay on your device while they are processed.
Related Audiobook Tools
Use these tools when you need to inspect, convert, or clean up the merged file.
Audiobook Metadata Editor
Clean up title, author, cover art, and chapter metadata after merging.
Audiobook Metadata Viewer
Inspect the merged file before importing it into another audiobook app.
MP3 to M4B Converter
Convert one existing file into M4B when you do not need a full merge workflow.
M4B to MP3 Converter
Create an MP3 copy after merging when another player prefers MP3 playback.
Helpful References
Primary references for local merge and container workflows.