Audit Any Page.
Fix Every
SEO Issue.
YAN SEO is the all-in-one technical SEO extension that audits titles, meta tags, headings, images, links, schema markup, and 18+ checks — instantly in your browser's side panel, on any website.
18+
SEO Checks
100%
Free Forever
Any
Website Works
0
Setup Required
Everything You Need to Master On-Page SEO
One click. Full analysis. No external tools, no tab-switching, no spreadsheets. YAN SEO runs everything directly inside your Chrome side panel.
Title & Meta Description Analyzer
On-PageVisual progress bars show you exactly if your title (0–60 chars) and meta description (0–160 chars) hit the sweet spot — or need trimming.
Heading Hierarchy Validator
StructureInstantly see your full H1–H6 tree with jump detection. Click any heading to scroll directly to it on the page.
Bulk Link Checker
LinksBatch-check every link on the page: valid, redirects, warnings, broken. Run 3 concurrent checks and export results as CSV.
Image SEO Auditor
ImagesScan all images for missing ALT text and title attributes. Supports lazy-loaded images. Click any thumbnail to scroll to it on the page.
Content Links Analyzer
LinksIsolates content-area links — excluding nav and footer — and shows the internal/external split with HTTP status codes for each URL.
Social Preview (Open Graph)
SocialSee exactly how your page looks when shared on social media. Detects OG title, description, and image mismatches vs your meta tags.
Keyword Density Analyzer
KeywordsEnter your target keyword and get instant density stats, repetition count, and SEO recommendations based on actual word count.
Technical SEO Checklist
TechnicalAutomated pass/fail checks: HTTPS, single H1, noindex/nofollow/nosnippet alerts, HTML lang attribute, mobile viewport, and UTF-8 charset.
SEO Counter & Scratchpad
ToolsLive word and character counter with real-time validation against recommended title and description length limits. Write and measure without leaving the browser.
Markdown Export for AI
AI ToolsConverts any page to clean Markdown. Compare HTML vs Markdown token count and see how much noise you eliminate for AI tools like ChatGPT.
Hreflang & Root Files
InternationalValidates hreflang tags for international SEO, then checks the existence of robots.txt, sitemap.xml (with smart discovery), and llms.txt.
UI Design Extractor
DesignExtract every font-family, text color, and background color used on a page. Click any color swatch to instantly copy the HEX code.
Plus: Content quality score, reading time, top keyword extractor, SEO text counter & scratchpad
Get All Features Free — Add to ChromeThree Steps to a Perfect SEO Audit
No dashboards to log into. No API keys. No configuration. Just install and audit.
Install the Free Extension
Add YAN SEO to Chrome from the Web Store in one click. No account, no signup, no subscription required.
Available on the Chrome Web Store. Always free.Navigate to Any Webpage
Open any website you want to audit — your own pages, competitor sites, or pages you're optimizing for clients.
Works on any URL: blogs, e-commerce, landing pages, news sites.Click YAN SEO → Instant Audit
Click the extension icon to open the side panel. Your full SEO audit loads instantly — no waiting, no exports needed.
Scroll, click headings to jump, check links, export Markdown. Find Broken Links
Before Google Does
YAN SEO's Bulk Link Checker runs concurrent HTTP checks on every link on the page — categorizing them as valid, redirects, warnings, or broken. No more manual checking with external tools.
- Checks up to 3 links simultaneously for speed
- Exports any category or all results as a CSV file
- Detects 301/302 redirects, 404 errors, and slow responses
- Internal vs. external link breakdown with percentages
- Copy all URLs in any category to clipboard in one click
Frequently Asked Questions
Everything you need to know about YAN SEO.
Yes. YAN SEO is 100% free, forever. There are no premium tiers, no credit card required, and no usage limits. Install it from the Chrome Web Store and use every feature without restrictions.
YAN SEO is built as a Chrome extension and works on Google Chrome and any Chromium-based browser (such as Microsoft Edge, Brave, or Opera). It uses Chrome's side panel API for a seamless experience.
Absolutely. YAN SEO works on any publicly accessible webpage — competitor sites, client pages, e-commerce stores, news sites, blogs, and more. Just navigate to the page and click the extension.
No. YAN SEO only runs when you explicitly open the side panel and trigger an audit. It has zero impact on your browsing performance when it's not in use. The extension uses a lightweight content script that activates on demand.
YAN SEO collects all visible links on the page (excluding navigation menus) and performs concurrent HTTP HEAD requests, falling back to GET when needed. Each link is categorized as valid (2xx), redirect (3xx), warning (slow), or broken (4xx/5xx). Results can be exported as a CSV file.
It converts the main content of any webpage into clean Markdown format — stripping HTML tags, scripts, and noise. The export includes frontmatter with the page title, description, URL, and OG image. It also shows you the estimated token count difference between raw HTML and clean Markdown, which is useful when feeding content into AI tools.
No. YAN SEO performs all analysis locally in your browser. It does not collect, store, or transmit any of your browsing data or page content to external servers. Your audits stay entirely on your device.
It's an automated set of pass/fail checks that run on every page you audit: single H1 validation, HTTPS detection, noindex/nofollow/nosnippet alerts, HTML lang attribute, mobile viewport meta tag, and UTF-8 charset encoding. These are common issues that silently harm SEO rankings.
Ready to Supercharge
Your SEO?
Join developers, SEOs, and marketers who use YAN SEO to audit pages instantly — directly in their browser. Free, forever.
Get in Touch
Have a question, suggestion, or just want to say hi? Send us a message.