SkillsAdd

thedaviddias/front-end-checklist

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.

First seen Aug 11, 2026

Installation

$ npx skills add thedaviddias/front-end-checklist --skill webfont-format
View on skills.sh ↗ GitHub repository ↗

Also in this package

Other skills from thedaviddias/front-end-checklist · top by installs.

npx skills add thedaviddias/front-end-checklist
frontend-checklist-global 96 color-contrast 22 animation-performance 22 https 19 pdf-size 18 word-count 18 image-optimization 18 cumulative-layout-shift 18 mobile-testing 18 quality 17

Browse all from thedaviddias/front-end-checklist

More details

Agent compatibility

Declared targets from SKILL.md / docs. Unmarked agents are not listed — the skill may still install via the CLI.

Claude Code Not declared
Cursor Not declared
Codex Not declared
GitHub Copilot Not declared
Windsurf Not declared
Gemini CLI Not declared
Cline Not declared
OpenCode Not declared

Repository health

Stars 74.1K
License MIT
Default branch main
Open issues 5
Status Active

Skill metadata

Parsed from SKILL.md frontmatter.

More metadata
category
css
priority
medium
difficulty
intermediate
estimatedTime
20
source
frontendchecklist.io
url
https://frontendchecklist.io/en/rules/css/webfont-format

Package contents

Files included with this skill beyond the listing page.

  • skill md SKILL.md 1,678 B
  • docs SUMMARY.md 225 B

History

  1. First seen on skills.sh
  2. First recorded snapshot · 5 installs

SKILL.md

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