How to Merge EPUB Files

Merging EPUB files is useful when you have a book split across multiple files, or want to combine a series into a single ebook. Here are three ways to do it.

Method 1: Use Epublys (Fastest)

1. Go to Merge EPUB
2. Drag and drop your EPUB files (up to 10 for free)
3. Reorder if needed, then click Merge EPUBs
4. Download your merged file

No sign up, no install. Works on Mac, Windows, Linux, and mobile.

Method 2: Calibre (Desktop App)

Calibre is a free desktop ebook manager. To merge EPUBs in Calibre, import all files, select them, right-click and choose "Merge selected records." This merges metadata and content but can be slow for large libraries.

If you don't want to install Calibre, try our online Calibre alternative instead.

Method 3: Command Line (epubmerge)

For developers, the epubmerge Python package can merge EPUBs programmatically. Install with pip install epubmerge and run from the terminal.

Tips for Merging EPUBs

• Files are combined in the order you add them — drag to reorder
• CSS styles from each book are preserved
• After merging, validate your EPUB to check for errors
• You can also compress the merged file to reduce size