21 checkers, 5 generators, no account
Free SEO and website tools
Each tool answers one question fast: is my robots.txt blocking ChatGPT, does my sitemap work, how does my page look when it is shared. When you want the whole picture, run the full audit.
Crawlability and indexing7AI search readiness4On-page SEO5Structured data1Performance1Accessibility1Security2Generators5
Crawlability and indexing
7 tools. Can search engines reach the page and index it.
SEO CheckerFind the technical problems that keep a page out of search results. The checker reads the page the way a search crawler does and lists what to fix first, with the evidence behind every verdict.Robots.txt CheckerCheck that robots.txt is published, parses cleanly and does not block the pages you want found. See at a glance which search engines and AI crawlers the rules allow.Sitemap CheckerCheck that your sitemap exists, parses as valid XML, is declared in robots.txt and lists urls that actually work. A broken sitemap wastes the crawl budget you give it.Redirect CheckerFollow every redirect of an address, hop by hop. Find chains that slow crawlers down, loops that break pages, and host variants that split your signals across duplicates.Indexability CheckerA page can be blocked from the index in four places: the status code, a noindex directive, robots.txt and the canonical link. Check all four at once and see exactly which one is the problem.Canonical CheckerThe canonical link tells search engines which url is the real one when several show the same content. Check that it exists, that it is absolute and that it points at a working page.Broken Link CheckerDead links frustrate visitors and waste crawl budget. Check a page for internal links that answer with errors or long redirect chains.
AI search readiness
4 tools. Can ChatGPT, Claude and Perplexity reach and read it.
AI Crawler CheckerFind out whether ChatGPT, Claude, Perplexity and other AI assistants can read your site. The checker reads your robots.txt rules for each AI crawler and requests the page with each crawler's user agent, so a firewall block shows up too.llms.txt Validatorllms.txt is a Markdown file that gives language models a short, curated map of a site. Check that yours is published, follows the proposed format and links to pages that work.AI Search Readiness CheckerGenerative engine optimization starts with access. Check that AI assistants can crawl your pages, receive the real content rather than a block page, and read it without running JavaScript.JavaScript SEO CheckerMany crawlers, including most AI crawlers, read the HTML the server sends and never run your JavaScript. Check how much of the page they actually see.
On-page SEO
5 tools. Titles, descriptions, headings, previews and images.
Meta Tag CheckerSee the title and description a search engine reads, how the result could look, and whether the canonical, robots, viewport and language tags are set correctly.Open Graph CheckerWhen someone shares your page, the preview comes from its Open Graph and Twitter card tags. Check that they are complete and see a preview of the card.Heading CheckerHeadings are the outline of a page for screen readers, search engines and AI assistants. See the outline of any page and fix skipped levels, empty headings and missing or duplicate H1s.Hreflang Checkerhreflang tells search engines which language version of a page to show to whom. Check the codes, the self reference and the x-default before the wrong version shows up in the wrong country.Image SEO CheckerImages without alt text are invisible to screen readers and image search. Oversized and legacy images slow the page down. Check both in one go.
Structured data
1 tool. The JSON-LD that describes the page to machines.
Performance
1 tool. Core Web Vitals and the causes of a slow page.
Accessibility
1 tool. The problems automated testing can catch.
Security
2 tools. HTTPS, certificates and security headers.
Security Headers CheckerSecurity headers tell browsers to stay on HTTPS, refuse to be framed, stop guessing content types and limit what scripts may do. Check which ones your site sends and how they are set.SSL and HTTPS CheckerA trusted certificate is only part of HTTPS. Check that the handshake succeeds, that http redirects to https, that HSTS keeps browsers on https and that no resource is loaded insecurely.
Generators
5 tools. Write the files and tags, in your browser.
Robots.txt GeneratorWrite a correct robots.txt in a minute. Pick a policy for AI crawlers, list the paths to keep crawlers out of, add your sitemap and copy the file.llms.txt GeneratorGive language models a clean map of your site. Fill in the name, a one sentence summary and the links that matter, and copy a valid llms.txt.Meta Tag GeneratorWrite the head of a page with a live preview of the search result and the social card. Copy the tags into your template when they look right.Schema Markup GeneratorPick a type, fill in the fields and copy valid JSON-LD. The generator includes the properties search engines require and recommend for each type.Security Headers GeneratorChoose the headers and their values, pick your platform, and copy a configuration for Nginx, Apache, Cloudflare, Netlify or Vercel.
Want everything at once?
The full audit runs all 55 checks in seven categories, scores the site and gives you a plan ordered by what helps most.