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127free tools covering technical SEO, schema markup, on-page, performance, links, and AI search optimization (AEO/GEO/LLMO). Search by the problem you're facing, or browse below.
Test if your robots.txt blocks search engines from crawling your site.
Check Google AI Overviews eligibility signals.
Audit Experience, Expertise, Authoritativeness, Trust.
Extract and validate schema markup from any URL.
Run Google PageSpeed Insights on any URL.
Generate llms.txt to control AI crawlers.
Robots, sitemaps, redirects, headers, SSL, hreflang.
Test if your robots.txt blocks search engines from crawling your site.
Build a clean robots.txt file for your site in seconds.
Validate XML sitemaps for syntax errors and broken URLs.
Generate a valid XML sitemap from a list of URLs.
Build hreflang tags for multi-language sites.
Check hreflang tags on a URL for errors and reciprocity.
Find the canonical URL set on any page.
View HTTP response headers from any URL, including security headers.
Trace HTTP redirects from any URL to find chains and loops.
Check the HTTP status code returned by any URL.
Verify SSL certificate validity, expiration, and chain.
Find insecure HTTP resources loaded on HTTPS pages.
Generate a downloadable QR code for any URL, free and instantly.
Generate .htaccess or Nginx 301 redirect rules from old and new URLs.
Test whether a specific URL is allowed or blocked by your robots.txt rules.
Detect noindex and nofollow in the meta robots tag and X-Robots-Tag header.
Read the X-Robots-Tag HTTP response header and decode its indexing directives.
Check that http/https and www/non-www variants all redirect to one canonical URL.
Validate rel=next and rel=prev link tags on paginated pages.
Check the responsive viewport meta tag and the page's character encoding declaration.
Check for favicon link tags and the default favicon files browsers and Google look for.
Detect a sitemap index file and list and validate the child sitemaps it references.
Detect AMP pages and run basic checks for required AMP markup and the amphtml link.
Detect pages that return HTTP 200 but are really 'not found' error pages.
One verdict on whether a page can be indexed — combining meta robots, X-Robots-Tag, robots.txt, canonical, and HTTP status.
Score any URL for SEO-friendliness — length, depth, parameters, uppercase, underscores, stop words, and readability.
Check whether a site has a valid security.txt file and validate its RFC 9116 fields like Contact and Expires.
Read the Strict-Transport-Security header, parse max-age, includeSubDomains, and preload, and report preload-list eligibility.
Parse the Content-Security-Policy header, list every directive, and flag weaknesses like unsafe-inline, unsafe-eval, and wildcards.
Cross-check your robots.txt against your sitemaps to find sitemap URLs that your own robots.txt would block from crawling.
JSON-LD generators and validators for rich results.
Generate Article schema markup for blog posts and news articles.
Generate Product schema markup for e-commerce pages.
Generate FAQPage schema markup for FAQs.
Generate LocalBusiness schema for local SEO.
Generate BreadcrumbList schema for navigation paths.
Generate HowTo schema for tutorial pages.
Generate Recipe schema for food blogs.
Generate Event schema for event pages.
Validate JSON-LD structured data syntax.
Extract and validate schema markup from any URL.
Generate Service schema markup for service businesses and offerings.
Generate Course schema markup for online and offline courses.
Generate SoftwareApplication schema for apps and SaaS products.
Generate Person schema markup for authors, founders, and profiles.
Generate WebSite SearchAction schema for a Google sitelinks searchbox.
Generate ItemList schema for Google carousel rich results.
Recommend the right schema types for any page based on its content.
Paste BreadcrumbList JSON-LD and validate the itemListElement array, ListItem fields, and position order.
Paste Review or AggregateRating JSON-LD and validate ratingValue range, author, itemReviewed, and Google policy compliance.
Fetch a page, extract every JSON-LD block, and score how many recommended and required properties each schema type includes.
Meta tags, headings, OG, Twitter Cards, readability.
Inspect all SEO meta tags on any URL.
Check if your title tag fits Google's 600-pixel limit.
Check if your meta description fits Google's SERP.
Preview how your page looks in Google search results.
Preview and generate Open Graph tags for social sharing.
Preview and generate Twitter Card meta tags.
Inspect H1-H6 hierarchy on any page.
Find images missing alt text on any page.
Count words and check readability score for any text.
Turn any title into a clean, SEO-friendly URL slug.
See which words and phrases dominate a page and whether any are over-stuffed.
Measure how much of a page is real text versus HTML markup and code.
Measure your title tag in pixels to see if Google will truncate it in search results.
Check a page's title and meta description for missing, generic, or duplicated content.
See whether a page leads with real content or pushes it below heavy headers and scripts.
Check whether your target keyword appears in the title, H1, URL, meta description, headings, and first 100 words.
Scan a page for non-descriptive image filenames like IMG_1234.jpg, DSC_001, and hash-like names that hurt image SEO.
Estimate how long a page takes to read, with word, sentence, and paragraph counts based on 200 words per minute.
Detect published and modified dates from meta tags, time elements, and schema, and flag content that looks stale.
Detect whether a page has an on-page table of contents with jump links to its headings.
Page speed, Core Web Vitals, mobile, server timing.
Run Google PageSpeed Insights on any URL.
Check real-world Core Web Vitals data from CrUX.
Check if a page is mobile-friendly.
Measure Time To First Byte for any URL.
Measure total HTML size and count scripts, styles, images, and requests.
Detect which CDN serves a site from its HTTP response headers.
Parse Cache-Control, Expires, ETag, and Last-Modified headers and flag weak caching.
Count images and iframes missing loading="lazy" to find eager-loaded assets.
Detect fonts without font-display and flag render-blocking font loads.
Broken links, internal links, anchor text, outbound.
Find broken links on any single page.
Inspect internal linking structure on a page.
Analyze anchor text distribution on a page.
Inspect external links on a page.
Build trackable campaign URLs with UTM parameters for Google Analytics.
Classify every link on a page as nofollow or dofollow, internal or external.
Find sitemap URLs that your homepage does not link to — likely orphaned pages.
Paste old URLs and a find/replace rule to build a copy-ready old → new redirect map.
llms.txt, AI crawler access, GEO optimization.
Generate llms.txt to control AI crawlers.
Validate llms.txt files for syntax and structure.
Check if AI crawlers can access your site.
Check robots.txt for AI bot directives.
Check Google AI Overviews eligibility signals.
Find the 40-60 word answer block AI engines lift.
Audit Experience, Expertise, Authoritativeness, Trust.
Find sentences LLMs are likely to cite.
Simulate how ChatGPT or Perplexity excerpts your page.
Extract and suggest PAA-style questions.
Check paragraph, list, and table snippet readiness.
Validate FAQPage JSON-LD on any URL.
Validate HowTo JSON-LD on any URL.
Score voice/AI assistant readiness of any page.
Heading hierarchy + entity density for LLM parsing.
Audit outbound citations and authoritative sources.
Parse server logs to see which AI bots visited.
Generate llms-full.txt with full page content for AI.
Check entity, schema, and brand signals.
Generate SpeakableSpecification JSON-LD for voice.
Generate Dataset JSON-LD for AI data discovery.
Generate QAPage JSON-LD for forum-style content.
Test if AI engines mention your brand for queries.
Track if Perplexity cites your domain for queries.
Predict how a page is likely to render inside Google AI Mode and AI Overviews snippets.
Score whether your page leads with a direct, concise answer that AI engines can lift.
Measure how many statistics, dates, and authority citations your page packs per 100 words.
Paste your content and a topic to see which related entities and terms you cover and which you miss.
Compare two versions of an llms.txt file and see exactly which lines were added, removed, or changed.
Generate ready-to-run prompts to test whether ChatGPT cites or recommends your brand.
Generate prompts to test whether Google Gemini cites or recommends your brand.
Build a robots.txt block that allows or blocks GPTBot, ClaudeBot, Google-Extended, PerplexityBot and other AI crawlers.
Generate an ai.txt AI-usage-policy file that states how AI systems may use your site's content.
Split a page into passages and score how self-contained each chunk is for RAG and AI retrieval.
Find the 'X is / X refers to' definition sentences AI engines love to quote, and count them.
Detect HTML tables on a page and classify which are likely comparison tables AI engines extract.
Detect whether a page has a TL;DR, summary, or key-takeaways block near the top for AI engines.
Fetch a site's llms.txt and robots.txt and flag contradictions between what each file allows or blocks.
Fetch a page, extract its main content, and convert it to clean Markdown you can copy in one click.
Check whether a brand, person or term exists as a Wikidata entity and see its QID and description.
One scan. 75+ checks across your whole site. AI-written fix instructions for every issue found.