Siteliner

Overview

Siteliner is a companion tool to Copyscape, built by the same team, but focused on internal duplicate content rather than cross-site plagiarism. While Copyscape checks if your content appears on other websites, Siteliner scans within your own site to find pages that share significant amounts of identical content. This internal duplication can confuse search engines about which page to rank and dilute the ranking signals across multiple similar pages.

Launched as a free web tool, Siteliner requires no account or installation. Enter a URL, and it crawls up to 250 pages, identifying duplicate content percentages, broken links, and average page load times. For a quick internal content audit, it remains one of the most accessible tools available.

Key Features

The duplicate content scanner compares every page on a site against every other page, calculating the percentage of content that is duplicated. Results show which pages share content, the specific duplicated text, and whether the duplication level is above average for sites of similar size. This goes beyond what most SEO crawlers do — while tools like Screaming Frog can identify identical pages, Siteliner detects partial duplication where pages share significant blocks of content.

Broken link detection identifies internal and external links that return error codes. While this is a standard feature in most crawlers, having it bundled with the duplicate content scan provides a convenient two-for-one audit.

Page speed analysis reports load times for each crawled page, highlighting the slowest pages that may need optimization. The tool compares your site’s average speed against its broader database of scanned sites.

The reporting interface shows site-wide statistics alongside page-level detail. Users can drill into specific pages to see exactly what content is duplicated and where the broken links point. Reports can be exported for offline analysis.

Pricing

Siteliner is free for scans up to 250 pages with a limit of one scan per month per site. Siteliner Premium allows unlimited scans with up to 25,000 pages per scan at $0.01 per page. The premium version also removes the monthly scan limit and provides additional export options.

Ideal Use Cases

Siteliner is ideal for quick duplicate content audits during site reviews, content audits, or pre-migration analysis. E-commerce sites with similar product descriptions, publishing sites with content syndication, and any site that has grown organically and may have accumulated internal duplication will benefit from a Siteliner scan. SEO consultants use it as a fast diagnostic tool when evaluating new client sites.

Limitations

Siteliner’s scope is intentionally narrow. It checks duplicate content, broken links, and page speed — nothing else. There is no technical SEO analysis, no schema validation, no Core Web Vitals assessment, and no ongoing monitoring. The 250-page limit on free scans is insufficient for large sites. The tool does not identify near-duplicate or paraphrased content, only exact text matches. For comprehensive site auditing, Siteliner is a supplement to broader tools, not a replacement.