SourcePrep converts DRM-free EPUBs into structured Markdown. One file per chapter, with YAML frontmatter. Drop the output into Obsidian, Claude, or any LLM workflow.
Download on the Mac App Store One-time purchase. No subscription. No cloud.--- title: "Chapter 1" book: "Pride and Prejudice" author: "Jane Austen" chapter: 1 --- # Chapter 1 It is a truth universally acknowledged, that a single man in possession of a good fortune, must be in want of a wife. However little known the feelings or views of such a man may be on his first entering a neighbourhood...
Drag and drop or use the file picker. Add one book or an entire library.
Per-chapter .md files with YAML frontmatter. Clean text, preserved structure.
Drop the folder into Obsidian, Claude Projects, or your preferred AI workflow.
Each chapter becomes its own .md file with YAML frontmatter (title, author, chapter number). Exactly how LLMs work best: one chunk at a time.
No uploads, no cloud, no accounts, no analytics. Your books never leave your Mac. Period.
Convert your entire EPUB library at once. Progress tracking, error handling, and smart deduplication built in.
Headings, bold, italic, lists, and blockquotes preserved as Markdown. Scripts, styles, and nav stripped. HTML entities decoded.
Output drops directly into your vault. Frontmatter parsed automatically. Wikilinks and graph view just work.
Detects protected files and tells you clearly, instead of producing garbage output. Handles font obfuscation correctly.
Pride and Prejudice/
index.md
chapter-01.md
chapter-02.md
...
chapter-61.md
Pride and Prejudice.txt
Single file, all chapters joined with separators. Clean paragraphs, no markup.
SourcePrep doesn't summarize, analyze, or process your books with AI.
It prepares the raw material so your LLM can.