YAN SEO

YAN SEO — Advanced Technical SEO Audit Tool for Chrome STOP guessing. START ranking. YAN SEO is a powerful Chrome extension that performs a full on-page and technical SEO audit of any website — instantly, right from your browser's side panel. No external tools, no subscriptions, no data sent anywhere. Just open a page, click the icon, and get a complete professional-grade analysis in seconds. 🔍 What YAN SEO Does: ----------------------------------------- SEO Score An overall 0-100 score summarizing the page's SEO health, calculated across nearly every module in the audit: meta tags, heading structure, content depth and readability, image ALT text, technical checks (HTTPS, viewport, encoding), robots.txt/sitemap, canonical, schema markup, internal linking, link health, Core Web Vitals, hreflang, Open Graph, and AI content fingerprint. If the page is marked NOINDEX, the score is automatically capped since the page can't rank in search results. Meta & SERP Preview Analyzes the page's Title Tag and Meta Description, showing optimal length and a live preview of how the result would appear in Google. Also audits the permalink (URL) and suggests a clean slug when it detects characters, casing, or stop words that should be removed. Keyword Density Analysis Lets you enter a target keyword and calculates how many times it appears in the content and its density (%), with a recommended repetition range based on the page's word count. Content Stats & Readability Shows word count, estimated reading time, and evaluates whether the content is thin, acceptable, or pillar content. Includes the Flesch Reading Ease score, sentence count, paragraph count, and average words per sentence. Heading Structure (H1-H6) Maps every heading on the page, counts how many exist at each level, and flags hierarchy errors (like jumping from H2 to H4 without an H3) or pages with more than one H1. Content Links Lists every link visible in the content (excluding nav/footer), separating internal from external, and automatically checks the HTTP status of each one to catch broken links. Images & ALT Text Detects every image on the page, showing a thumbnail, ALT text, and Title attribute, and flags which ones are missing ALT (image SEO/accessibility) or a Title attribute. Canonical Checks whether a canonical tag exists and whether it correctly self-references the page or points to a different URL. Hreflang Detects configured hreflang tags for other language/region versions and validates that each one has a valid language code and URL. Schema Markup (Structured Data) Detects every JSON-LD block on the page (Product, Article, FAQ, LocalBusiness, etc.), displays its type with an identifying icon, and lets you view the full JSON for each block. Open Graph / Social Preview Shows how the page would look when shared on social media (Open Graph image, title, and description) and warns if the og:title/og:description don't match the real title/meta description. Core Web Vitals Measures LCP (Largest Contentful Paint), CLS (Cumulative Layout Shift), and INP (Interaction to Next Paint) directly on the live page being audited, plus TTFB, long tasks, and render-blocking resources. Top Keywords Extracts the most frequent words and phrases (n-grams) from the content, letting you switch between unigram, bigram, and trigram to spot the page's real topical focus. Root Files (Robots.txt, Sitemap.xml, LLMs.txt) Automatically checks whether the domain has a robots.txt, sitemap.xml (searching standard paths and also the directives inside robots.txt), and llms.txt. Link Checker A dedicated bulk module to check the status of every link on the page, classifying them as valid, redirected, warning, or broken, with CSV export and quick URL copying per category. AI Content Fingerprint Analyzes writing patterns (vocabulary variety, sentence-length uniformity, generic AI-typical phrases, first-person usage, data density, and named-entity density) to estimate how human or AI-generated the content sounds. Internal Link Architecture Analyzes the real internal linking of the content (excluding nav/footer): top anchors used, linked section categories, average link depth, and detection of nofollow internal links. Page Intent Classifier Automatically classifies the page by likely search intent (transactional, commercial, informational, or navigational) based on page elements like pricing, forms, questions, and URL structure. Competitor Radar Lets you enter a competitor's URL and compares both pages side by side on key metrics: meta, content, images, schema, internal linking, and readability, plus shows the keyword gap between them. Markdown Export Converts the page's content into clean Markdown, showing the "noise" (token) reduction versus the original HTML — useful for feeding content into AI tools with less wasted context. SEO Character Counter A standalone character/word counting tool for drafting titles and descriptions from scratch, with quick conversion to uppercase, lowercase, or Title Case. Robots.txt Analysis Fetches and parses the site's robots.txt into a readable table of rules per crawler (Googlebot, Bingbot, GPTBot, ClaudeBot, and others). Flags accidental full-site blocks and blocked CSS/JS files, and lists any sitemap the file declares. Sitemap.xml Analysis Finds the site's sitemap — including sitemap indexes with multiple sub-sitemaps, showing the URL count for each — checks a sample of URLs for broken links, and cross-checks it against robots.txt to catch pages that are submitted for crawling but accidentally blocked. Orphan & Unindexed Pages Crawls the site's internal links from the homepage to see how pages connect to each other, then flags pages with no internal links pointing to them, pages marked noindex, leftover default WordPress pages (like "Hello World"), and content that reads as off-topic compared to the rest of the site.