Hi glenanPL,

the Font Book upload works a little differently than a normal Joomla media upload. You cannot upload the original TTF or OTF file directly, and simply putting the font files into a ZIP archive is not enough either.

According to the official JoomShaper documentation, you first need to create a proper Webfont Kit.

JoomShaper recommends the following process:

1. Go to Transfonter and upload your original TTF or OTF font.
2. Use only one font file at a time when creating the package. JoomShaper specifically notes that multiple font files in one package can cause problems.
3. Convert the font and download the generated Webfont Kit.
4. The downloaded ZIP is the package that should be uploaded to SP Page Builder - not the original TTF/OTF file and not a manually created ZIP.
5. In Joomla, open SP Page Builder → Font Book, click Upload Font, and select the generated ZIP package.

If you still receive an upload error with a correctly generated package, JoomShaper also recommends checking the server configuration. In particular, the PHP memory_limit should be higher than 128M.

There are also some limitations worth noting: JoomShaper states that Font Book is intended for fonts used inside SP Page Builder Components and Modules. If you want to use a custom font globally across the entire Joomla site, they recommend using other methods.

The complete instructions, including the Transfonter settings and troubleshooting information, are available in the official documentation: https://www.joomshaper.com/documentation/sp-page-builder/font-book

If that workflow feels too complicated, you could also have a look at OD Local Fonts (ODLF) as an alternative for managing local fonts in Joomla. https://extensions.joomla.org/extension/od-local-fonts/