: You can convert only the characters you need (e.g., just numbers 0-9), significantly saving memory on hardware with limited storage. Leading Conversion Tools Several tools are commonly used to create these files:

While LVGL's official converter is best, here are alternatives:

Because VLW files are bitmaps, they don't scale. If you create a font at size 12, it will look tiny on a high-resolution screen or huge on a small OLED. You usually need to generate multiple .h files for different sizes (e.g., FontSmall.h , FontLarge.h ) and switch between them in your code.

Thus, a converter is a tool that reads a .ttf file and outputs a .vlw file.