ChapterForge

Turn audiobook files into polished, chapter-based M4B releases with a Mac workflow built for control, cleanup, and less manual work.

ChapterForge helps audiobook collectors, authors, narrators, producers, and Mac power users convert, merge, organize, and automate audiobook workflows without command-line tools.

CONVERT MP3 FOLDERS TO M4B

Import MP3 chapters and ChapterForge creates a project from your source files. It reads metadata, detects track order, finds folder or embedded artwork, and prepares chapters for review. Reorder chapters, edit titles, update book metadata, then export a finished M4B with chapter markers and cover art.

MERGE EXISTING M4B FILES

Combine multipart or split M4B audiobooks into one continuous file without re-encoding the audio. ChapterForge extracts embedded chapters, rebuilds the timeline, lets you rename chapters or use Find & Replace, and carries cover art into the final release.

SMART AUTO-IMPORT

Scan larger audiobook collections, group files by metadata and folder structure, detect multipart albums, find artwork, and review results before creating projects in bulk. Live percentage progress shows file discovery and metadata-reading activity throughout longer scans.

WATCH FOLDERS

Monitor folders for new audiobook drops, review detected items, track duplicates and history, and choose whether ChapterForge should create projects, add jobs to the queue, or begin conversion automatically.

CUSTOM OUTPUT TEMPLATES

Control how finished audiobooks are organized and named under your Master Output folder.

Build reusable folder and filename templates with:

{title} {album} {author} {authorSort} {narrator} {genre} {year}

Example folder:

{authorSort}/{year}/{title}

Example filename:

{title} - {narrator}

A live preview shows the resolved output path before conversion. The same templates work across MP3 conversion, M4B merging, batch jobs, and watch-folder automation.

Publication Year can be read from source metadata or entered manually. Conflicting source years are flagged for review. Empty Album falls back to Title, empty Author Sort falls back to Author, and missing Year uses “Unknown Year.”

HIGHLIGHTS

• Convert MP3 folders into chapter-based M4B audiobooks
• Merge multiple M4B files without re-encoding
• Review, reorder, rename, and bulk-edit chapters
• Clean chapter names with Find & Replace
• Read metadata and artwork automatically
• Prefer folder cover images with embedded artwork fallback
• Create custom output folders and filenames from metadata
• Preview the final output path before conversion
• Scan larger libraries and create projects in bulk
• Monitor watch folders and automate incoming work
• Add jobs to a batch queue, track progress, and retry failures
• Open completed audiobooks in Books
• Save projects and return to them later

TRY CHAPTERFORGE FREE

Free mode lets you test real output using your own files:

• Convert up to 3 chapters in a single project
• Merge up to 3 M4B files

ChapterForge Pro unlocks full-length conversion, batch queueing, Smart Auto-Import, expanded metadata, larger merge jobs, and automated watch-folder actions.

BUILT FOR MACOS

ChapterForge combines a native macOS interface with an FFmpeg-powered conversion and merge pipeline, delivering a practical Mac app for serious audiobook workflows.

Perfect for collectors cleaning up local libraries, authors and narrators packaging releases, and producers combining multipart audiobooks.

Terms of Use:
https://www.apple.com/legal/internet-services/itunes/dev/stdeula/