# Yes SEO

> Yes SEO is a free SEO and AI-search checker at https://yes-seo.com/: a single-page audit with an SEO score and an AI-visibility score (10 free audits per day, no signup) plus 41 free single-purpose tools, in English, French, Spanish and Arabic.

Every page is available as Markdown by adding `.md` to its URL (for example https://yes-seo.com/index.md). Tools can be called programmatically through a free JSON API (`GET /api/v1/{tool}?url=…`, OpenAPI spec at https://yes-seo.com/openapi.json) and through an MCP server at https://yes-seo.com/mcp (Streamable HTTP, no auth).

## Tools

- [Free SEO Checker](https://yes-seo.com/free-seo-checker.md): Full single-page SEO audit with no signup: 0–100 SEO score plus an AI-visibility score, 60+ checks, prioritized fix list with why/how, SERP and social previews, keywords, headings, AI crawler access, tech stack, export to Markdown/JSON/print. 10 free audits a day.
- [Website SEO Audit](https://yes-seo.com/website-seo-audit.md): Website SEO audit: free single-page audit, or a whole-site crawl (up to 100 pages on Pro, 250 on Agency) that finds broken internal links, duplicate titles/descriptions, thin pages and site-wide issues, ranked by impact.
- [SEO Analyzer](https://yes-seo.com/seo-analyzer.md): SEO analyzer that reads a page like Googlebot (server HTML, no JS): titles, headings, canonical, robots, hreflang, schema, links, speed signals, security headers, with a plain-English fix for every issue.
- [Check SEO Score](https://yes-seo.com/check-website-seo-score.md): Check a website SEO score from 0 to 100 and see exactly which checks cost points, the category breakdown (indexing, content, links, speed, mobile, security, social) and which fixes raise the score most.
- [On-Page SEO Checker](https://yes-seo.com/on-page-seo-checker.md): On-page SEO checker: title, meta description, H1 and heading outline, content depth, keyword consistency between title/H1/description, image alt text, internal links, readability.
- [SEO Report Generator](https://yes-seo.com/seo-report-generator.md): SEO report generator: shareable report link, free Markdown/JSON export and print-to-PDF; white-label branded PDF reports (logo, colors) on Pro and Agency plans for client work.
- [AI SEO Checker](https://yes-seo.com/ai-seo-checker.md): AI SEO / GEO checker: AI-visibility score (0–100) showing whether ChatGPT, Claude, Perplexity, Gemini and Google AI Overviews can access, understand and cite a page: AI crawler access in robots.txt, server-rendered text, snippet directives, answer-ready structure, entity schema, author/date (E-E-A-T) signals, freshness, citations, llms.txt (optional).
- [SEO Compare](https://yes-seo.com/seo-compare.md): Compare the SEO of two pages side by side (yours vs a competitor): scores, title and description, word count, headings, links, schema, speed, AI readiness, with the gaps highlighted.
- [AI Crawler Checker](https://yes-seo.com/ai-crawler-checker.md): AI crawler checker: tests a site's robots.txt against 25+ AI bots (GPTBot, OAI-SearchBot, ChatGPT-User, ClaudeBot, Claude-SearchBot, Claude-User, PerplexityBot, Perplexity-User, Google-Extended, Applebot-Extended, CCBot, Meta-ExternalAgent, Bytespider, Amazonbot, DuckAssistBot, MistralAI-User and more), grouped by purpose (search, user fetch, training), plus a live firewall test that requests the page with real AI user-agents to detect 403 blocks.
- [llms.txt Generator](https://yes-seo.com/llms-txt-generator.md): llms.txt generator and validator: checks whether /llms.txt exists and is well-formed (H1, summary, link sections), and generates a ready-to-upload llms.txt draft from the site's home page, navigation and sitemap. Honest note: llms.txt is optional and no major AI platform has confirmed using it for ranking or citations.
- [Meta Tags Checker](https://yes-seo.com/meta-tags-checker.md): Meta tags checker: lists every meta tag of a page (title, description, robots, viewport, charset, canonical, Open Graph, Twitter, hreflang, verification tags) with length and pixel-width checks and fixes.
- [SERP Preview](https://yes-seo.com/serp-preview.md): SERP snippet preview / Google simulator: type or fetch a title, meta description and URL and see the desktop and mobile Google result with real pixel-width truncation (title ~580 px, description ~920 px), character counts and a live checklist.
- [Heading Checker](https://yes-seo.com/heading-checker.md): Heading checker: shows the H1–H6 outline of a page as a tree, flags missing or multiple H1, skipped levels, empty and overlong headings.
- [Keyword Density Checker](https://yes-seo.com/keyword-density-checker.md): Keyword density checker: top 1-, 2- and 3-word phrases with counts and density for a URL or pasted text (stop words removed in English, French, Spanish and Arabic), and whether the main phrases appear in the title, H1 and description.
- [Image Alt Text Checker](https://yes-seo.com/image-alt-checker.md): Image alt text and image SEO checker: every image on a page with its alt text, file size, format (JPEG/PNG vs WebP/AVIF), dimensions, lazy loading; flags missing alt, oversized files and layout-shift risks.
- [Link Analyzer](https://yes-seo.com/link-analyzer.md): Link analyzer: every internal and external link on a page with anchor text, rel attributes (nofollow, sponsored, ugc), empty anchors, duplicates and counts.
- [Word Counter](https://yes-seo.com/word-counter.md): Word and character counter: words, characters with and without spaces, sentences, paragraphs, reading and speaking time, keyword frequency; works in any language, entirely in the browser.
- [Readability Checker](https://yes-seo.com/readability-checker.md): Readability checker: Flesch Reading Ease (English), Kandel-Moles (French), Fernández Huerta (Spanish), plus sentence length, long sentences, word length and passive-voice hints for a URL or pasted text.
- [Open Graph Checker](https://yes-seo.com/open-graph-checker.md): Open Graph and Twitter Card checker: previews how a link looks when shared on Facebook, X/Twitter, LinkedIn, WhatsApp and Slack, validates og:image size and every tag.
- [Meta Tag Generator](https://yes-seo.com/meta-tag-generator.md): Meta tag generator: fill a form and copy ready HTML for title, description, robots, canonical, viewport, Open Graph, Twitter Card and hreflang tags, with a live SERP preview.
- [robots.txt Tester](https://yes-seo.com/robots-txt-tester.md): robots.txt tester: fetches and parses robots.txt, tests any URL against Googlebot, Bingbot and AI bots with Google's longest-match rules, highlights the matching rule, syntax errors and sitemap lines. Also accepts pasted robots.txt rules.
- [robots.txt Generator](https://yes-seo.com/robots-txt-generator.md): robots.txt generator: build a robots.txt with presets (allow all, block admin areas, block or allow AI training bots, allow AI search bots), custom rules and sitemap lines.
- [Sitemap Validator](https://yes-seo.com/sitemap-validator.md): XML sitemap validator: finds the sitemap (robots.txt, /sitemap.xml, sitemap index), validates XML and limits (50,000 URLs / 50 MB), lastmod dates, hreflang alternates, and status-checks a sample of listed URLs for 404s, redirects and noindex.
- [Sitemap Generator](https://yes-seo.com/sitemap-generator.md): XML sitemap generator: crawls up to 300 pages of a site (respecting robots.txt, skipping noindex and non-canonical pages) and produces a downloadable sitemap.xml.
- [Redirect Checker](https://yes-seo.com/redirect-checker.md): Redirect checker: traces every hop of a redirect chain (301, 302, 307, 308, meta refresh) with status, location, timing; detects loops, long chains and http→https / www consolidation.
- [HTTP Header Checker](https://yes-seo.com/http-header-checker.md): HTTP header checker: shows the raw response headers (status, server, cache-control, content-type, encoding, X-Robots-Tag, link, HSTS) and explains the SEO-relevant ones.
- [HTTP Status Checker](https://yes-seo.com/http-status-checker.md): Bulk HTTP status code checker: paste up to 50 URLs and get each status code, redirect target and response time.
- [Broken Link Checker](https://yes-seo.com/broken-link-checker.md): Broken link checker: tests up to 200 links on a page (internal and external) for 404, 410, 5xx, DNS errors and redirects, with the anchor text of each broken link.
- [Canonical Checker](https://yes-seo.com/canonical-checker.md): Canonical checker: finds rel=canonical in HTML and HTTP headers, checks it is absolute, self-referencing or intentional, returns 200 and is indexable, and tests http/https and www/non-www variants redirect to one version.
- [Hreflang Checker](https://yes-seo.com/hreflang-checker.md): Hreflang checker: lists hreflang alternates from HTML, HTTP headers, validates language/region codes, x-default, self-reference, and fetches each alternate to verify return links and canonicals.
- [Schema Validator](https://yes-seo.com/schema-validator.md): Schema markup validator: extracts JSON-LD, microdata and RDFa types, validates JSON syntax and Google's required/recommended properties for Article, Product, Organization, LocalBusiness, BreadcrumbList, Event, Recipe, VideoObject, JobPosting, Review, SoftwareApplication; notes that FAQ (since 2026) and HowTo rich results are no longer shown by Google.
- [Schema Generator](https://yes-seo.com/schema-generator.md): Schema markup generator: build JSON-LD for Organization, LocalBusiness, Article, Product, BreadcrumbList, Person, Event, WebSite, SoftwareApplication and FAQPage with a form, then copy the script tag.
- [Page Speed Test](https://yes-seo.com/page-speed-test.md): Page speed test: server response time (TTFB), download time, HTML size and compression, HTTP version, number and weight of scripts, styles and images, render-blocking resources, caching and modern image formats; Core Web Vitals (LCP, INP, CLS) from Google PageSpeed Insights when available.
- [Mobile-Friendly Test](https://yes-seo.com/mobile-friendly-test.md): Mobile-friendly test: viewport tag, responsive CSS (media queries), fixed-width elements, legible base font, tap-target hints, responsive images, plugins, interstitial hints — static checks since Google retired its own Mobile-Friendly Test in 2023.
- [Indexability Checker](https://yes-seo.com/indexability-checker.md): Indexability checker: answers "can Google index this page?" in one view: HTTP status, robots.txt rule, meta robots and X-Robots-Tag, canonical target, sitemap presence, redirect, nosnippet — with the blocking reason highlighted.
- [CMS Checker](https://yes-seo.com/website-technology-checker.md): Website technology checker / CMS detector: detects the CMS (WordPress, Shopify, Wix, Squarespace, Webflow, Joomla, Drupal, Magento, Ghost…), frameworks (Next.js, Nuxt, React, Vue, Angular), CDNs, analytics and tag managers, servers and SEO plugins from HTML and headers.
- [IndexNow Submitter](https://yes-seo.com/indexnow-submitter.md): IndexNow submitter: generate an IndexNow key, verify the key file on your site and submit up to 1,000 URLs to Bing, Yandex, Naver, Seznam and Yep in one click (Google does not support IndexNow).
- [SSL Checker](https://yes-seo.com/ssl-checker.md): SSL certificate checker: issuer, validity dates and days left, covered domains (SAN), key and signature, TLS version, and whether HTTP redirects to HTTPS.
- [Security Headers Checker](https://yes-seo.com/security-headers-checker.md): Security headers checker: grades A+ to F for Strict-Transport-Security, Content-Security-Policy, X-Content-Type-Options, X-Frame-Options, Referrer-Policy, Permissions-Policy and cookie flags, with copy-paste fixes for Apache, Nginx and Cloudflare.
- [DNS Lookup](https://yes-seo.com/dns-lookup.md): DNS lookup: A, AAAA, CNAME, MX, NS, TXT, SOA and CAA records, with SPF and DMARC parsed and checked for common mistakes.
- [Domain Age Checker](https://yes-seo.com/domain-age-checker.md): Domain age and expiry checker (RDAP/WHOIS): registration date and age, expiry date and days left, registrar, status codes and name servers.

## For developers and AI agents

- [Developers: API and MCP server](https://yes-seo.com/developers.md): how to call every tool from code or from Claude, ChatGPT, Cursor and other MCP clients
- [OpenAPI specification](https://yes-seo.com/openapi.json): machine-readable description of the JSON API
- [Full-site audit API](https://yes-seo.com/api/v1/audit?url=https://example.com): returns SEO score, AI-visibility score, categories, every check with why/how-to-fix

## Guides

- [How Accurate Are SEO Checkers? Facts, Guesses and How to Verify Them](https://yes-seo.com/blog/are-seo-checkers-accurate.md): SEO checkers report facts about your HTML very reliably, but their scores are opinions that vary from tool to tool. Here’s where results go wrong, how to read any report and how to confirm findings in Search Console.
- [Why Your Website Isn’t Showing Up on Google (and How to Fix It)](https://yes-seo.com/blog/website-not-showing-on-google.md): Most sites that don’t appear on Google have one of nine causes, from a leftover noindex tag to a canonical pointing elsewhere. Use the diagnosis table to match your Search Console status to the fix, then request indexing the right way.
- [How to Find and Fix Broken Links on Your Website](https://yes-seo.com/blog/how-to-fix-broken-links.md): A practical routine for finding broken internal and external links, deciding between a 301 redirect and a 410, and fixing them in WordPress. It ends with the habits that stop new broken links from appearing.
- [How Long Should an SEO Title Be? Pixel Widths, Rewrites and Examples](https://yes-seo.com/blog/seo-title-length.md): Google cuts titles off by pixel width, not by character count, and rewrites the ones that are vague or stuffed. Here’s the safe length, a title formula and 15 before-and-after examples you can adapt.
- [How to Write Meta Descriptions That Earn the Click](https://yes-seo.com/blog/meta-description-best-practices.md): Meta descriptions don’t affect rankings, but they shape whether people click. Learn the right length, how to match intent and why Google rewrites them, then borrow from 20 examples by page type.
- [How to Run an SEO Audit for a Client, From Scope to Presentation](https://yes-seo.com/blog/seo-audit-for-clients.md): A step-by-step process for client SEO audits that end in fixes, not filing cabinets. It covers scoping, data collection, prioritization, a report outline you can reuse and how to present the results.
- [The Best Free SEO Checkers of 2026: An Honest Comparison](https://yes-seo.com/blog/best-free-seo-checker-tools.md): Nine popular free SEO checkers compared on free limits, depth, link testing, AI-search checks, exports and languages, as of October 2026. Includes which combination to use for your kind of site.
- [Generative Engine Optimization: How to Get Cited by AI Answer Engines](https://yes-seo.com/blog/generative-engine-optimization-guide.md): GEO is mostly good SEO plus a few AI-specific checks: crawler access, quotable passages and visible expertise. This guide covers how AI answers choose sources, what to do and what is still unproven.
- [What Is llms.txt? A Practical Guide With an Example](https://yes-seo.com/blog/llms-txt-guide.md): What the llms.txt proposal is, how its Markdown format works and a complete example you can adapt. Plus an honest look at who reads the file in 2026 and when it’s worth your time.
- [How to Block AI Crawlers With robots.txt (2026 List and Recipes)](https://yes-seo.com/blog/block-ai-crawlers-robots-txt.md): Every major AI user agent in 2026, grouped into search, user-triggered and training bots. Copy-paste robots.txt recipes, firewall options and a quick way to verify your rules.
- [How to Get Your Pages Cited in Google’s AI Overviews](https://yes-seo.com/blog/how-to-appear-in-ai-overviews.md): Google says AI Overviews need no special markup: a page must be indexed and eligible for a snippet. Here’s how to check eligibility, what content gets cited, how to measure it in Search Console and which myths to ignore.
- [Core Web Vitals: Thresholds, Measurement and Fixes for LCP, INP and CLS](https://yes-seo.com/blog/core-web-vitals-guide.md): What LCP, INP and CLS measure, the 75th-percentile thresholds you need to pass and why field and lab data disagree. Then the specific fixes for each metric, plus TTFB.
- [Schema Markup in 2026: Which Types Still Work and How to Add Them](https://yes-seo.com/blog/schema-markup-guide.md): Which structured data types still earn rich results in 2026, the properties Google requires for each and copy-paste JSON-LD examples. Plus how schema helps AI understanding and the errors that cost you eligibility.
- [Hreflang Explained: How to Set Up Language and Region Versions](https://yes-seo.com/blog/hreflang-guide.md): When hreflang is worth adding, the exact syntax for HTML, HTTP headers and sitemaps, and how codes, x-default and return links work. Plus how hreflang interacts with canonicals and what Bing looks at instead.
- [The 2026 Technical SEO Checklist: Crawl, Index, Render, Speed and AI Access](https://yes-seo.com/blog/technical-seo-checklist.md): Nine areas every technical SEO audit should cover in 2026, from robots.txt and canonicals to Core Web Vitals and AI crawler access. Each item comes with exactly how to check it.
- [Local SEO Checklist: How to Show Up in Google Maps and the Local Pack](https://yes-seo.com/blog/local-seo-checklist.md): Eight steps to improve how your business appears in Google Maps and local results, from your Business Profile to LocalBusiness schema. Includes the review practices to avoid and how to measure what works.
- [Looking for a Seobility Alternative? A Fair Side-by-Side Look](https://yes-seo.com/blog/seobility-alternative.md): A fair look at Seobility’s strengths and where a no-signup checker with AI-search checks may suit you better. Includes a comparison table and the cases where Seobility is the better choice.
- [Looking for an SEOptimer Alternative? An Honest Comparison](https://yes-seo.com/blog/seoptimer-alternative.md): An honest comparison of SEOptimer and Yes SEO for audits, branded client reports and AI-search checks. Includes a hedged feature table and the cases where SEOptimer remains the better choice.
- [How to Check Your Website’s SEO in 15 Minutes](https://yes-seo.com/blog/how-to-check-website-seo.md): A step-by-step routine for checking any website’s SEO with free tools — and the order to fix things in so the first hour of work has the biggest impact.
- [What Is a Good SEO Score? (And What to Fix First)](https://yes-seo.com/blog/what-is-a-good-seo-score.md): SEO scores are useful — if you know what they measure. Here is what a good score looks like, why tools disagree, and which fixes move the number most.
- [SEO Audit Checklist: 25 Things to Check on Every Page](https://yes-seo.com/blog/seo-audit-checklist.md): The 25 checks we run on every page, grouped by what they protect — indexing, relevance, quality, speed and sharing — with how to test and fix each one.

## Reference

- [SEO glossary](https://yes-seo.com/glossary.md): 73 SEO and AI-search terms with definitions and examples
- [HTTP status codes](https://yes-seo.com/http-status-codes.md): every status code that matters for SEO, with causes and fixes
- [Pricing](https://yes-seo.com/pricing.md): free plan, Pro and Agency

## Optional

- [Full text of all tool pages and guides](https://yes-seo.com/llms-full.txt)
- [About](https://yes-seo.com/about.md)
- [Français](https://yes-seo.com/fr.md): Français version
- [Español](https://yes-seo.com/es.md): Español version
- [العربية](https://yes-seo.com/ar.md): العربية version