Free web development tools & generators
WCAG 2.1 contrast ratio checker for foreground/background color pairs. Pass/fail ratings for AA and AAA levels.
Generate robots.txt files with allow/disallow directives, sitemap URLs, crawl-delay, and user-agent blocks.
Generate favicon HTML meta tags in multiple sizes for optimal browser display.
Generate complete SEO meta tags including title, description, keywords, robots directives, and canonical URL.
Create OG and Twitter Card meta tags with live preview for social media sharing.
Visually create CSS box shadows with live preview. Adjust offset, blur, spread, color, and opacity.
Generate viewport, mobile, theme color, and PWA meta tags for responsive web design.