Drop in a folder of MP3s — get back one clean M4B with real chapter markers, cover art, and complete metadata. Often without re-encoding a single sample.
Coming soon to the App Store for Mac, iPhone, and iPad.
Many converters wrap your audio in an M4A and rename it. Apple Books can tell the difference — that's how audiobooks end up chapterless, lose your place, or get filed under Music. Audiobook Studio writes a true M4B container from the first byte.
| Loose MP3s | Renamed M4A | Audiobook Studio | |
|---|---|---|---|
| Container brand | ✕ No container | △ Claims to be M4A | ✓ True M4B major brand |
| Chapter markers | ✕ One file per chapter | △ One format, if any | ✓ QuickTime + Nero |
| Remembers your place | ✕ Rarely | △ Unreliable | ✓ Always |
| Metadata & sort tags | ✕ Fragmented | △ Minimal | ✓ Complete, incl. sort tags |
| Lands in Apple Books | ✕ Goes to Music | △ Unpredictable | ✓ Filed as an audiobook |
| Classic iPod playback | △ No chapters | ✕ Often breaks | ✓ Dedicated iPod mode |
Built around one idea: get from messy files to a clean book with the least fiddling — and zero quality loss whenever possible.
MP3 and AAC sources are merged bit-for-bit — no re-encode, no generation loss, and exports that finish in seconds.
Writes both QuickTime and Nero chapter formats, so every player — Apple Books, CarPlay, Plex, iPods — sees your chapters.
Search Audible, Apple Books, and Google Books for the title, author, narrator, series, description, and cover art.
Pull the actual chapter titles and timings for your book from Audible's catalog and snap them to silences in your audio.
One long file with no structure? Analyze it once and carve chapters at the pauses — with live, instant re-tuning.
Click any track or chapter to hear the assembled book from that point, at up to 2× speed — across file boundaries.
Set a book cover and even per-chapter images. Missing chapter art is filled with the cover automatically.
High Detail, Balanced, or Space Saver — each showing the estimated file size before you commit. Full manual control too.
One toggle keeps a long book playable as a single file on vintage iPods, picking the best safe sample rate for its length.
One file, parts of a maximum length, or one file per chapter — plus M4A, MP3, AIFF, and WAV when you need them.
Save a book in progress and pick it up later. Your session is restored automatically if you close the app mid-edit.
Your audio never leaves your device. No accounts, no uploads, no tracking — metadata search is the only thing that goes online.
You drop the files. Audiobook Studio handles the fussy parts.
Drag in files or whole folders — MP3, M4A/M4B, FLAC, WAV, AIFF, OGG, Opus, even the audio track of a video. Files are sorted naturally, embedded tags are read, and tidy folder names become title, author, and series.
One search across Audible, Apple Books, and Google Books brings back the real cover, narrator, series, year, and description. Pick a result and every field fills itself.
Each file becomes a chapter — rename inline, merge files with Join, split them back apart, or expand a chapter to see exactly which files are inside. Prefer automation? Detect chapters from silence, import a CUE sheet, or apply Audible's real chapter list.
Click any row and the assembled book plays from that exact point — across file boundaries, exactly as the export will sound. A floating mini-player keeps speed and position at hand.
Pick a preset — or go fully manual — and see the estimated size before you export. When your sources allow it, the merge is bit-perfect lossless and takes seconds, not minutes.
No files handy? One tap loads a complete public-domain audiobook so you can explore every feature — then export the result and keep it.
Rename the chapters, swap the cover, preview the narration, and export a finished M4B — the whole workflow on real audio, before you commit a single file of your own.
Public-domain recording courtesy of LibriVox.
One codebase builds every edition, so the M4B that comes out of your iPhone is byte-for-byte as correct as the one from your Mac. Exports even keep running on iOS when you switch apps.
Cover, metadata, and search in one tab.
The whole workflow, one hand.
The Mac-style layout, touch-first.
MP3, M4A, M4B, AAC, FLAC, WAV, AIFF, OGG, Opus, CAF — and the audio from video files like MP4, MOV, and MKV. You can mix formats freely in one book.
When all your sources are MP3, or all are AAC in MP4-family containers, with matching sample rates and channel counts, Audiobook Studio copies the audio frames bit-for-bit into the new file. No re-encode, no quality loss — and it's nearly instant. The export sheet tells you when a lossless merge is possible.
Yes. Audiobook Studio writes chapter data in both of the formats players actually read — QuickTime chapter tracks and Nero chpl atoms — and stamps the file with a true M4B container brand so it's recognized as an audiobook everywhere.
That's a specialty. Detect chapters from the silences in the narration, import timestamps from a CUE or text file, or fetch the book's real chapter list from Audible's catalog and snap each marker to the nearest pause.
No. All audio processing happens on your device. The only network requests are the optional metadata and chapter lookups, which send just your search text or the book's catalog ID.
The Mac edition adds drag-and-drop import, multi-window projects, MP3 encoding, and optional xHE-AAC export for roughly half-size files. See the Mac page for details.
Coming soon to the App Store for Mac, iPhone, and iPad.