How do I install the Webfont Format skill?

Run npx skillmds@latest add thedaviddias/webfont-format in your terminal (requires Node.js), paste this page's agent-chat prompt into Claude, Cursor, or any MCP-connected agent, or download the SKILL.md file and copy it into your agent's skills directory.

Is Webfont Format safe to use?

This skill has not completed SkillMD's automated safety review yet. SkillMD never runs a skill's scripts for you; review the SKILL.md before installing.

Which AI agents work with Webfont Format?

This skill is tagged as working with Claude Code, Claude.ai, OpenAI Codex. SKILL.md is an open format, so most agents that read a skills directory can load it too.

Is Webfont Format free to use?

Yes. Installing skills from SkillMD is free, and the skill stays under its author's original license.

Who published Webfont Format?

thedaviddias (@thedaviddias) published this skill. Their other Agent Skills are listed on their SkillMD profile.

Webfont Format by thedaviddias — Agent Skill

Name: Webfont Format
Author: thedaviddias

Webfont Format

Use when reviewing stylesheets, component styles, and responsive behavior related to Optimize web font formats. Check the rendered layout across breakpoints and interaction states before proposing a fix.

thedaviddias 05e8302 2 files · 22.3 KB Updated Sep 17, 2026

File contents

Optimize web font formats

Modern font formats reduce file sizes by 30-50%—directly improving page load speed and Core Web Vitals scores.

Quick Reference

Use WOFF2 as primary format (~30% smaller than WOFF)
Include WOFF fallback for older browsers
Apply font-display: swap for better perceived performance
Preload critical fonts and subset to reduce file sizes

Check

Verify that web fonts use modern formats (WOFF2, WOFF) with proper fallbacks and are optimized for performance with font-display and preloading strategies.

Fix

Convert fonts to WOFF2/WOFF formats, implement proper font loading strategies, and optimize font delivery with compression and caching.

Explain

Explain how modern web font formats reduce file sizes, improve loading performance, and provide better browser support compared to legacy formats.

Code Review

Review stylesheets, component styles, and responsive states related to Optimize web font formats. Flag exact selectors, declarations, or breakpoints that violate the rule in the rendered UI.

For full implementation details, code examples, and framework-specific guidance, see references/rule.md.

Rule page: https://frontendchecklist.io/en/rules/css/webfont-format

Frequently asked questions