Add Kindle-optimized font collection with complete 4-variant families#44
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Born2Root merged 1 commit intoBorn2Root:mainfrom Nov 17, 2025
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This addresses multiple Kindle compatibility issues reported in Born2Root#8 and other issues by providing properly structured font families optimized specifically for Kindle devices. ## What's Included The `fast-fonts-for-kindle` folder contains 6 font families, each with complete 4-variant sets (Regular, Italic, Bold, Bold Italic) in OTF format: - **Fast Sans** / **Fast Sans Dotted** - Clean sans-serif fonts - **Fast Serif** - Traditional serif font - **Fast Atkinson** / **Fast Atkinson Dotted** - Based on Atkinson Hyperlegible - **Fast OpenDyslexic** - Based on OpenDyslexic, optimized for dyslexia ## Why This Fixes Kindle Issues **Problem:** Many users reported that bold text doesn't show correctly on Kindle (Issue Born2Root#8). **Root Cause:** Kindle requires a complete font family with all 4 variants (Regular, Italic, Bold, Bold Italic) to properly display bold and italic text. Single font files, even with embedded bold glyphs, won't work correctly. **Solution:** Each family now includes: - All 4 style variants as separate OTF files - Proper PANOSE classification (fixes serif display issue) - Correct language system declarations (latn, grek, cyrl) - Unique family metadata for proper font detection - Preview images for easy identification ## Technical Improvements 1. **OTF Format**: Better compatibility with older Kindle devices 2. **Complete Families**: 4-variant sets for proper bold/italic rendering 3. **Fixed Metadata**: Proper PANOSE (2,11,5,2,2,2,2,2,2,4) prevents serif fallback 4. **Language Support**: Explicit languagesystem declarations for Kindle compatibility 5. **Unique Names**: Each family has distinct metadata to prevent conflicts ## Additional Font Families Beyond the original Fast Sans/Serif fonts, this adds: - **Fast Atkinson**: Based on Braille Institute's Atkinson Hyperlegible font, designed for enhanced readability with improved character distinction - **Fast OpenDyslexic**: Based on OpenDyslexic font with weighted bottoms to reduce letter confusion for readers with dyslexia - **Dotted Variants**: Space-reading technique with dots between words ## Installation Users should download the entire folder for their chosen font family and copy all 4 OTF files to their Kindle's fonts folder. See https://github.com/jloutsch/fast-fonts-for-kindle for detailed installation instructions and additional documentation. 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude <noreply@anthropic.com>
This was referenced Oct 6, 2025
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One comment to add is that, for older models without azw3 support, the files must be converted to KFX using the calibre KFX input and KFX output plugins. |
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After following this instruction on my Paperwhite 12 Gen, I've only had "Fast_Sans" in italic. I added all 4 otf file of Fast-Sans into my font folder as described. |
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I suggest that you connect your kindle to the computer but browse the file system from within your file explorer (NOT calibre). You may need to delete the ebook from your kindle there and add it back. You should also check in calibre via the ebook edit window that you do not have config for preferring publisher fonts. Check here: https://www.mobileread.com/forums/showthread.php?t=336445 On my 11th gen paperwhite, the fonts work with azw2 files, but I had to clear additional copies of the book that calibre didn't delete, but only duplicated. |
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Summary
This PR adds a comprehensive
fast-fonts-for-kindlefolder containing properly structured font families that resolve the Kindle compatibility issues reported in #8 and other issues.Problem Statement
Multiple users have reported that bold text doesn't display correctly on Kindle devices. The root cause is that Kindle requires a complete font family with all 4 variants (Regular, Italic, Bold, Bold Italic) to properly render bold and italic text. Single font files with embedded bold glyphs don't work correctly on Kindle.
Solution
This PR provides 6 complete font families, each with all 4 variants in OTF format:
Font Families Included
Each family includes:
Technical Improvements
(2,11,5,2,2,2,2,2,2,4)prevents the font name from displaying in seriflanguagesystemdeclarations ensure the speed-reading features work correctlyNew Font Families
Beyond the original Fast Sans/Serif fonts:
Installation Instructions
Users should:
Fast_Sans)fontsfolderRelated Issues
Fixes #8 - Bold text not showing on Kindle
Addresses user reports of fonts not appearing or bold not working
Additional Resources
For detailed installation instructions and documentation, see the standalone repository: https://github.com/jloutsch/fast-fonts-for-kindle
🤖 Generated with Claude Code