If you're experiencing issues with font previews not displaying properly, it may be due to one of the following reasons:

Outdated Font Design

Traditional fonts were primarily designed for print purposes without fully considering screen display requirements. These older fonts may not include the complete character sets needed for modern web pages, causing problems when displaying certain languages or symbols.

Solutions:

Look for modern versions of the font or suitable alternatives that have been optimized to support wider character sets
Use third-party font format conversion tools (such as Convertio) to convert old font files to web-compatible formats

Font Abnormalities or Missing Critical Data

The CMap (Character Mapping Table) in font files is responsible for mapping character codes to specific glyphs. If this part is missing or corrupted, browsers cannot render text correctly. Font files may become corrupted during creation or conversion processes.

Solutions:

Use third-party font format conversion tools (such as Convertio) to regenerate font files
Ensure all necessary data is included during the conversion process

Font File Size Exceeds 30 MB

This limitation exists because the Chromium technology stack used by Eagle has strict specifications for the maximum WebFont file size. This regulation is based on several considerations:

Larger font files may slow down page loading, affecting user experience
Large files consume more memory, potentially reducing performance or causing application crashes, especially on mobile devices
Large files increase loading time in poor network conditions, affecting page smoothness
Limiting file size helps reduce potential compatibility issues and crash risks, ensuring consistent experiences across different platforms and devices

Why Can't Some Fonts Be Previewed in Detail View?