Best for professionals. It costs money (~$149 USD), but it is zero-hassle and zero-data-loss.
Upload file. TTC or DFONT, 50 MB max. Drag-and-drop is supported. My file is too large. What can I do? Download ZIP archive. Transfonter Convert or extract TTC font to TTF - how to? [closed] convert ttc font to ttf best
The script unfurled its logic like a map. Best for professionals