Free tier with generous crawl limits for small to medium websites
Last updated Jan 25, 2026
Siteliner occupies a niche position in the SEO tools market, specifically focusing on internal duplicate content detection. As a product from Copyscape, it benefits from brand recognition in the content originality space and serves as a complementary tool to external plagiarism detection services.
Siteliner is a specialized web-based tool designed to help website owners, SEO professionals, and content managers identify and resolve duplicate content issues across their websites. The platform crawls websites to detect identical or similar content across multiple pages, broken links, page load times, and other technical SEO factors that can impact search engine rankings and user experience. By providing detailed reports on content duplication percentages, internal linking structures, and page-level metrics, Siteliner enables users to optimize their websites for better search engine performance and content quality. Developed by Copyscape, a well-established company in the plagiarism detection space, Siteliner leverages similar technology to analyze internal website content rather than external plagiarism. The tool serves as a complementary product to Copyscape's external duplicate content detection services, offering webmasters a comprehensive solution for maintaining content originality both internally and externally. Siteliner has become a trusted resource in the SEO and digital marketing community for its straightforward interface and actionable insights that help improve website quality and search engine optimization.
Scans websites to identify pages with duplicate or highly similar content, providing percentage matches and specific page comparisons
Identifies broken internal and external links across the website to improve user experience and SEO
Measures and reports page load speeds to help optimize website performance
Maps internal linking structure and identifies pages with too many or too few internal links
Provides overview metrics including total pages, word count, duplicate content percentage, and common content analysis
Detailed reports for individual pages showing duplicate content matches, link counts, and word counts