Custom Fonts for EPUB Reader

Upload custom fonts to personalize your reading experience in Grimmory’s EPUB reader. Fonts from Google Fonts or Font Squirrel work well.

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Uploading a Font

1. Navigate to Settings > Reader and scroll to the Custom Font Library section

2. Click the Add New Font button

   

3. Click the upload area or drag and drop a font file

   

4. After selecting a file, a preview and name input appear. Enter a display name (or keep the filename).

   

5. Click Upload Font to save

Supported Formats and Limits

Format	Extension
TrueType	.ttf
OpenType	.otf
Web Open Font	.woff
Web Open Font 2	.woff2

• Max file size: 5 MB per font
• Max fonts per user: 10
• Storage location: ~/grimmory/data/custom-fonts/

Quota

If you already have 10 fonts, delete one before uploading.

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Managing Fonts

Your font collection is displayed in Settings > Reader > Custom Font Library.

To delete a font, click the trash icon on its card and confirm. If the deleted font was selected in your preferences, it reverts to the default.

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Using Custom Fonts

Global Default

Set a custom font as the default for all EPUB books in Settings > Reader > eBook Reader: Default Settings > Typography > Font Family.

Per-Book Setting

While reading an EPUB, open Settings > Typography in the reader header. Custom fonts appear at the bottom of the Font Family dropdown.

Note

Custom fonts only apply to the web-based EPUB reader. PDFs, comics, and device sync (Kobo/KOReader) use their own font settings.

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Troubleshooting

Issue	Solution
File size exceeds 5 MB	Convert to WOFF2 format using Transfonter for better compression
Font doesn’t appear in reader	Hard refresh the browser (Ctrl+F5 / Cmd+Shift+R), then re-select the font in preferences
Font renders incorrectly	Re-download from the original source, or try a different weight/version

License Compliance

Only upload fonts you have the right to use. Free fonts from Google Fonts and Font Squirrel are typically safe. Commercial fonts may have restrictions.