KoboFix Font Processor

Overview

kobofix.py is a Python script designed to process TTF and OTF fonts for Kobo e-readers.

It generates a renamed font, fixes PANOSE information based on the filename, adjusts the baseline with the font-line utility, and adds a legacy kern table which allows the kepub engine for improved rendering of kerned pairs.

Requirements

• Python 3.8+
• FontTools

pip3 install fonttools

• font-line utility

pip3 install font-line

Usage

1. Open a terminal and navigate to the directory containing your font files.

2. Run the script with a glob pattern to include all TTF/OTF files:

   python3 kobofix.py *.ttf
   

3. The script will:

   • Validate filenames.
   • Process each font.
   • Apply kerning, rename, PANOSE adjustments, and baseline shift.
   • Save output as KC_<original_filename>.

Example:

Original: Lora-BoldItalic.ttf
Processed: KC_Lora-BoldItalic.ttf