Annie Cushing's SEO audit worksheets (on Google Docs here).Website Health Check - a quick and easy to use Firefox plugin looking for duplication of pages within the Google search index.Siteliner - from the makers of Copyscape, highlights duplication across pages.Google & Bing also offer search by image features. TinEye - allows you to find other sites using your images.Copyscape - allows you to find other sites using your content, or where user generated content on your site might be duplicated from other sites.Tools like GWMT also have a broken links section. Most of the link analysis tools like Ahrefs, Majestic & OSE list broken inbound links and broken outbound links.Scrapebox - desktop-based web crawling software.SiteLiner - web-based crawl for find duplicate content & broken links.Free on smaller sites and has a paid premium version. Screaming Frog SEO Spider - similar to Xenu Link Sleuth with a lot more features.Xenu Link Sleuth - a website crawler tool.Robots.txt Analyzer - analyze your robots.txt file.

Robots.txt Generator - create a robots.txt file.

Robots.txt Primer - learn all about robots.txt files.

A/B Rankings - paid tool offering rank tracking, longtail keyword research & split testing tools.

One page seo checker