Kindle compatibilty

[arcanite24]

Hi!

Is this compatible with Kindle?

I'm putting the .ttf files into the /fonts directory and they're not showing up

[Born2Root]

Hi,

I have no Kindle so I cannot check it out myself, but I know it works on Kobo-KoReader.

Still I looked it up on the internet. As far as I understood the Kindle needs 4 font-variants of the same font, be placed in the folder.

The official info is:

Note: In order for the Kindle to recognize which style the font has, the fonts must comply with these conventions:
    Fontname-Regular.ttf (normal)
    Fontname-Italic.ttf (italic)
    Fontname-Bold.ttf (bold)
    Fontname-BoldItalic.ttf (bold and italic)

If the font is copied to the device and does not correspond to this naming scheme, the Kindle will not recognize it.

This means you first of all have to name the font like "Fastfont-Regular.ttf". I also read somewhere that the kindle (dependend on the firmware version) needs exactly this 4 names. Since we have Regular and Bold combined in the FastFont you have to copy the Font four times and name it differently - Regular, -Italic, -Bold and -BoldItalic like mentioned above.

Afterwards the Kindle should at least show you the font in the selection menu. You have to try out if the speed-reading functionality works. That is dependend on, if the kindle supports the opentype features of the font, that are the intelligence to print certain letters bold for speed-reading.

It would be great if you could post a short comment, if it worked or not. That could help other users trying the same ;-)

[arcanite24]

Thanks for your response!

I'll definitely try adding the 4 variants.

Some interesting findings I made last week:

• The two regular files work out of the box on Kindle but only with DRM books, in this case, those purchased directly on the Amazon store.
• Local books pushed to the Kindle via Calibre doesn't allow the font change
• Removing the DRM or converting them to AZW3/Mobi unlock the font change feature
• "Baking" the font in Calibre editor doesn't work too, Kindle overrides it

Hopefully I can find a solution and open up a PR with the fix

Thanks for the amazing work, I've been reading waaay faster and I can understand a lot more than before

[maciejmrowiec]

I can verify that the font worked straight out of the box with Kindle Paperwhite (5th gen) by copying Fast-sans.ttf and Fast-serif.ttf as they are.

[GoSuToSaKuRa]

I can verify that the font worked straight out of the box with Kindle Paperwhite (5th gen) by copying Fast-sans.ttf and Fast-serif.ttf as they are.

Hi, I am using Paperwhite 7th generation, but I cannot find the font after transferring to the font folder.

Update: I finally successfully transferred the font files to the Kindle, however, when I apply the font, it is just plain Sans and Serif

[arcanite24]

Same @GoSuToSaKuRa

It works great with books purchased directly from Amazon.

For books sent via Calibre:

• MOBI files doesn't show the fonts
• AZW3 files, show the fonts, but it doesn't have the effect, looks like a regular font

I've been trying a lot of things, from "burning" the font directly into the AZW3, custom CSS and nothing works. Only PDF files with the incrusted font works, but they look horrible on Kindle

[arcanite24]

I just created a Python script that applies this effect directly to the files: https://github.com/arcanite24/libre-bioread

[echarrod]

Can confirm this works out the box for me too, copying the two files (Fast-sans.ttf and Fast-serif.ttf) over to my Kindle Paperwhite 6" 👌 Thanks!

[giutala]

I made a python script that reads the books in your Calibre, let's you choose which ones to convert, and runs @arcanite24 script automatically: https://github.com/giutala/calibre_bionic_converter