# Rank-O-Saur

> Rank-O-Saur is a free Chrome extension for on-page and technical SEO analysis. It inspects a page's title tag, meta description, canonical, robots directives, headings, content, links, images, structured data, Core Web Vitals, rendering (SSR vs CSR) and AI-crawler accessibility — directly in the browser. This site hosts the extension's homepage and a comprehensive SEO knowledge base.

## Main Pages

- [Homepage](https://rankosaur.com/): Overview of the Rank-O-Saur SEO extension, its features and how to install it.
- [Changelog](https://rankosaur.com/changelog): Version history and recent updates to the extension.
- [SEO Knowledge Base](https://rankosaur.com/en/wiki/): Index of all SEO guides, with code examples and best practices.

## SEO Wiki Guides

- [Title Tag](https://rankosaur.com/en/wiki/title-tag): The most important on-page tag — ideal pixel length and keyword placement.
- [Meta Description](https://rankosaur.com/en/wiki/meta-description): Writing snippets that increase click-through rate from the search results.
- [Canonical Tag](https://rankosaur.com/en/wiki/canonical-tag): Consolidating duplicate content signals to a single primary URL.
- [Meta Robots Tag](https://rankosaur.com/en/wiki/meta-robots-tag): Page-level indexing control with noindex and nofollow directives.
- [robots.txt](https://rankosaur.com/en/wiki/robots-txt): Controlling web crawlers, crawl budget and blocking AI bots.
- [X-Robots-Tag](https://rankosaur.com/en/wiki/x-robots-tag): Controlling the indexing of non-HTML files via HTTP response headers.
- [XML Sitemap](https://rankosaur.com/en/wiki/sitemap-xml): Helping search engines discover and prioritize your pages.
- [Core Web Vitals](https://rankosaur.com/en/wiki/core-web-vitals): Google's LCP, INP and CLS performance and user-experience metrics.
- [Language & Hreflang](https://rankosaur.com/en/wiki/hreflang): International SEO with the HTML lang attribute and hreflang tags.
- [JSON-LD Structured Data](https://rankosaur.com/en/wiki/json-ld-markups): Earning rich results with Schema.org structured data.
- [URLs & Status Codes](https://rankosaur.com/en/wiki/url-structure): SEO-friendly URL structure and HTTP status codes (200, 3XX, 4XX, 5XX).
- [Heading Structure](https://rankosaur.com/en/wiki/heading-structure): Using H1–H6 headings and building a logical content hierarchy.
- [Content & Readability](https://rankosaur.com/en/wiki/content-readability): Content length, search intent and the Flesch Reading Ease score.
- [Image SEO](https://rankosaur.com/en/wiki/image-seo): Alt text, file size, compression and modern image formats.
- [Link Analysis](https://rankosaur.com/en/wiki/link-analysis): Internal and external links, nofollow, redirects (3XX) and broken links (4XX).
- [Open Graph & Twitter Cards](https://rankosaur.com/en/wiki/open-graph): Controlling how pages look when shared on social media.
- [Rendering (SSR vs CSR)](https://rankosaur.com/en/wiki/rendering): Server-side vs client-side rendering and JavaScript SEO.
- [llms.txt & AI Crawlers](https://rankosaur.com/en/wiki/llms-txt): The llms.txt standard, AI crawlers and Generative Engine Optimization.

## Optional

- [Support & FAQ](https://rankosaur.com/support): Help, frequently asked questions and contact information.
- [Privacy Policy](https://rankosaur.com/privacy): How the extension handles data and privacy.