MobileRead Forums - View Single Post - Help: missing embedded fonts after ePub3 transfer to Kindle

Nightjar · 12-24-2022, 01:20 PM

Dear friends,
After many years of happy ePub2 coding – whose files were converted to .mobi using Amazon's Kindle Previewer to provide the widest choice for our readers – we were forced to start from scratch and build a new ePub3 structure for our ebooks.

Everything is fine on any "basic" ePub reader (including ADE) and Apple Books, but when we sideload ePub3 files on our Kindle readers, all the custom fonts we use are completely missing.

Please note that if we convert the ePub3 files to .mobi using Kindle Previewer 3.70 and copy them to the same readers, all the custom fonts show up. So, there seems to be something "filtering" these fonts.

We have tried everything and of course all the ePub3 and CSS validations passed with flying colours, but basically now we are stuck because we don't know how to get a Kindle reader to properly display an ePub3 with embedded fonts.

Any help or suggestion would be greatly appreciated!

Thanks.

12-24-2022, 01:20 PM	#1
Nightjar Member Posts: 14 Karma: 10 Join Date: Dec 2022 Location: Bologna, Italy Device: Kindle Paperwhite, Fire HD8, 4, iPad 1st, 2th, 3th, 5th gen	Help: missing embedded fonts after ePub3 transfer to Kindle Dear friends, After many years of happy ePub2 coding – whose files were converted to .mobi using Amazon's Kindle Previewer to provide the widest choice for our readers – we were forced to start from scratch and build a new ePub3 structure for our ebooks. Everything is fine on any "basic" ePub reader (including ADE) and Apple Books, but when we sideload ePub3 files on our Kindle readers, all the custom fonts we use are completely missing. Please note that if we convert the ePub3 files to .mobi using Kindle Previewer 3.70 and copy them to the same readers, all the custom fonts show up. So, there seems to be something "filtering" these fonts. We have tried everything and of course all the ePub3 and CSS validations passed with flying colours, but basically now we are stuck because we don't know how to get a Kindle reader to properly display an ePub3 with embedded fonts. Any help or suggestion would be greatly appreciated! Thanks.