Articles & Guides
Developer guides to complement our web tools.
Meta Tags Guide: Every HTML Meta Tag You Need for SEO
Which meta tags matter in 2026, which are obsolete, and how to implement them correctly.
SEO HTMLWeb Accessibility & Color Contrast: WCAG 2.1 Guide
AA vs AAA contrast requirements, common failing combinations, and how to make your site accessible.
Accessibility WCAGFavicon Guide: Complete Setup for Every Browser & Device
Required sizes, HTML implementation, and PWA manifest setup for complete favicon coverage.
Branding PWARobots.txt Explained: How to Control Search Engine Crawling
Syntax, common mistakes, and best practices for your robots.txt file.
SEO CrawlingCSS Box Shadow Guide: Create Beautiful Shadows Like a Pro
The syntax explained, preset shadows that look great, and performance tips.
CSS DesignComplete SEO Audit Checklist for 2026
Technical SEO, on-page SEO, and off-page factors. The definitive checklist for any website.
SEO ChecklistOpen Graph Tags Guide: Control How Your Links Look When Shared
Master Open Graph meta tags so your links show a clean title, description, and image when shared. Sizes, examples, and common mistakes.
Open Graph SEOCore Web Vitals in 2026: The Three Metrics Google Measures
LCP, INP, and CLS explained with the 2026 thresholds and practical fixes. Learn why INP replaced FID and how to pass at the 75th percentile.
Performance SEOCSS Units Explained: px, em, rem, %, vw, and When to Use Each
A clear guide to CSS length units. Learn how px, em, rem, percent, and viewport units calculate their values and exactly when to use each.
CSS LayoutResponsive Breakpoints Guide: Where to Put Your Media Queries
A practical set of responsive breakpoints, why mobile first wins, and how modern CSS lets you skip many media queries entirely.
CSS ResponsiveStructured Data with JSON-LD: A Practical Guide for 2026
Add JSON-LD structured data to earn rich results. Where it goes, common schema types, the rules that keep you safe, and how to test it.
SEO Structured Data