Local Source FAQ

Learn how to import and read your offline manga, comic archives, and EPUB novels in Wammy.

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What file formats can I read locally?

Wammy supports a wide range of standard comic and document formats:

• Comic Archives: .cbz, .cbr, .zip, and .rar files.
• Novel Formats: .epub electronic publication files.
• Folder Images: Uncompressed image directories containing .jpg, .jpeg, .png, or .webp pages.

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Where should I place my local files?

By default, Wammy looks for offline files in: Internal Storage/Wammy/local/

You can change or inspect your storage location at: Settings > Data and storage > Storage location.

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How should I organize my folder structure?

To ensure Wammy correctly groups your series and chapters, organize your files into subdirectories:

For Manga & Comics:

Wammy/
  └── local/
      └── One Piece/
          ├── Chapter 001.cbz
          ├── Chapter 002.cbz
          └── Chapter 003/
              ├── 01.jpg
              ├── 02.jpg
              └── 03.jpg

For Light Novels:

Wammy/
  └── local/
      └── Overlord/
          ├── Volume 01.epub
          └── Volume 02.epub

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How do I set custom cover art and series metadata?

Place the following files directly inside the series folder (e.g. Wammy/local/One Piece/):

• Cover Image: Add a cover.jpg or cover.png file to display custom cover art on library cards.
• Metadata: Add a details.json file to populate author, artist, description, genres, and publication status.

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Why are my local files not showing up?

1. Verify that your files are placed in the directory configured under Settings > Data and storage > Storage location.
2. Go to Browse > Sources > Local source, pull down to refresh the catalog, and verify file permissions.
3. On Android 11+, ensure Wammy has been granted All Files Access (MANAGE_EXTERNAL_STORAGE) so it can read user-selected folders outside its sandboxed app directory.