Checkbot

Checkbot is a browser extension that crawls websites to identify SEO, speed, and security issues, such as broken links, duplicate content, invalid HTML, and insecure pages. It is designed for web developers, marketers, and IT professionals who need to maintain website health across multiple sites. The tool tests hundreds of pages at once, including local sites, and provides instant feedback to prevent critical issues from going live. It is available as a free Chrome extension with a paid Pro tier.

Key features

• Crawl 100s of pages at once
• Test for broken links
• Check duplicate content
• Validate HTML, CSS, JS
• Detect insecure pages
• Identify redirect chains
• Minify CSS and JavaScript
• Leverage browser caching
• Enable server compression
• Avoid render blocking scripts
• Use HTTPS on all pages
• Avoid mixed content errors
• Secure password forms
• Enable HSTS preload
• Turn on XSS protection
• Disable type sniffing
• Use unique page titles
• Eliminate duplicate pages
• Use human readable URLs
• Avoid temporary redirects