After lots struggling, searching and researching, I finally found a working solution, which I am posting it here just for future reference to help out anyone who might want to do the same.
I have seen several posts here about using custom fonts under TiddlyWiki 5 most focus on external third party font services like Google Fonts <https://groups.google.com/d/msg/tiddlywiki/HynvAJZ21_8/-jyW5yzDfZAJ> or Font Awesome <http://blog.jeffreykishner.com/2014/01/23/how-to-incorporate-font-awesome-icons-into-tiddlywiki-5.html>, some try embedding custom <https://groups.google.com/d/msg/tiddlywiki/utsLmgHZAhM/B8tHIRTjJYMJ> font files using base64 encodind <https://www.fontsquirrel.com/tools/webfont-generator> inside the tiddlywiki file. All I wanted was a simple way to use a locally installed external font file, preferably using a basic relative path. Just create a new tiddler with whatever name you want, tag it with $:/tags/Stylesheet and add the following content to it, customizing where necessary @font-face { font-family: myFontFamily; src: url(Font_File.ttf); } .tc-title{ color: red; font-family: "myFontFamily" , sans-serif; } Adjust the src: url() part to a path pointing to your ttf otf or woff file, and adjust .tc-title to style whatever part of the wiki you wish. Hope this helps anywome in the future -- You received this message because you are subscribed to the Google Groups "TiddlyWiki" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To post to this group, send email to [email protected]. Visit this group at https://groups.google.com/group/tiddlywiki. To view this discussion on the web visit https://groups.google.com/d/msgid/tiddlywiki/be846fa4-208e-45c5-96e1-26f2c7b75ddd%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.

