# PageChecks Full Corpus

Canonical host: https://pagechecks.com

## Core
- [PageChecks Home](https://pagechecks.com/): Homepage with core positioning and direct access to the full free tool suite.
- [All Tools Directory](https://pagechecks.com/tools/): Directory of all free tools for on-page, technical, and AI search workflows.
- [Blog](https://pagechecks.com/blog/): Guides and product writing on technical SEO, AI visibility, and publishing workflows.
- [Chrome Extension](https://pagechecks.com/chrome-extension/): Chrome extension landing page for instant on-page SEO checks inside the browser.
- [Tool Alternatives](https://pagechecks.com/vs/): Comparison hub for alternative pages against popular SEO platforms.
- [About PageChecks](https://pagechecks.com/about/): Company context, editorial standards, and contact information for PageChecks.

## Authors
- [Max](https://pagechecks.com/authors/max/): Web developer who built PageChecks out of the audit toolkit he used at his agency.
  Summary: Max has been building websites since high school. PageChecks started as the internal audit toolkit at his web agency, a set of small browser checks he ran on client URLs before paying for full crawls or vendor reports. After enough clients asked how he ran them, he packaged the kit up and shipped it publicly so any developer or marketer could run the same diagnostics for free.

Today he builds the tools, writes the editorial, and reviews every page against the live product before it goes out. Coverage spans technical SEO, AI crawler access, machine-readable publishing, and retrieval workflows, with the editorial focus tied to what moves traffic on the page in front of you, not what fills a content calendar.

## Categories
- [On-Page SEO Tools](https://pagechecks.com/tools/on-page-seo/): Free on-page SEO tools to audit meta tags, preview SERP snippets, generate schema markup, check Open Graph tags, and validate structured data. No signup required.
- [Technical SEO Tools](https://pagechecks.com/tools/technical-seo/): Free technical SEO tools for robots.txt, sitemaps, redirects, Core Web Vitals, HTTP headers, canonical tags, and site-wide audits. No signup required.
- [Free AI SEO Tools](https://pagechecks.com/tools/ai-seo/): Free AI SEO tools to audit LLM crawl access, test machine readability, map entity coverage, and optimize for AI search engines like ChatGPT and Google AI Overviews.

## Tools: On-Page SEO
- [Title & Meta Pixel-Width Checker](https://pagechecks.com/tools/title-meta-pixel-width-checker/): Measure title and meta description pixel width to avoid truncated snippets.
- [UTM Campaign Link Builder](https://pagechecks.com/tools/utm-campaign-link-builder/): Build tagged campaign URLs with consistent utm_source, medium, and campaign values.
- [FAQ & HowTo Schema Generator](https://pagechecks.com/tools/faq-howto-schema-generator/): Build valid FAQPage and HowTo JSON-LD from simple Q&A and step rows.
- [Anchor Text & Link Auditor](https://pagechecks.com/tools/anchor-text-link-auditor/): Audit anchor text, rel attributes, and link security from pasted HTML.
- [JSON-LD & Microdata Converter](https://pagechecks.com/tools/jsonld-microdata-converter/): Convert structured data between JSON-LD and Microdata in either direction.
- [Word Count & Keyword Density](https://pagechecks.com/tools/word-count-keyword-density/): Count words and unique terms, then score 1-, 2-, and 3-word keyword density for any URL.
- [OG Image Dimension Validator](https://pagechecks.com/tools/og-image-dimension-validator/): Verify og:image and twitter:image pixel size, ratio, and weight.
- [Meta Tag Checker](https://pagechecks.com/tools/meta-tag-checker/): Analyze title, description, canonical, robots, and OG tags.
- [SERP Simulator](https://pagechecks.com/tools/serp-simulator/): Preview Google title and description snippets on desktop and mobile.
- [Schema Generator](https://pagechecks.com/tools/schema-generator/): Generate JSON-LD for Article, FAQ, Product, LocalBusiness, and more.
- [Open Graph Checker](https://pagechecks.com/tools/open-graph-checker/): Test OG and Twitter tags with social card previews.
- [Hreflang Generator](https://pagechecks.com/tools/hreflang-generator/): Generate valid hreflang link tags for multilingual pages.
- [Structured Data Validator](https://pagechecks.com/tools/structured-data-validator/): Validate JSON-LD syntax and required schema properties.
- [Duplicate Content Detector](https://pagechecks.com/tools/duplicate-content-detector/): Find duplicate titles, descriptions, and page content.
- [Image SEO Auditor](https://pagechecks.com/tools/image-seo-auditor/): Audit alt text, file size, and lazy-loading usage.

## Tools: Technical SEO
- [URL Slug & Query Cleaner](https://pagechecks.com/tools/url-slug-query-cleaner/): Slugify any text and strip tracking parameters from URLs.
- [.htaccess & Nginx Redirect Generator](https://pagechecks.com/tools/htaccess-nginx-redirect-generator/): Turn from→to redirect rows into ready-to-paste Apache and Nginx rules.
- [Mobile-Friendly Test](https://pagechecks.com/tools/mobile-friendly-test/): Check viewport, layout, tap targets, and phone CrUX field data.
- [DNS Records Lookup](https://pagechecks.com/tools/dns-records-lookup/): Resolve A, AAAA, CNAME, MX, NS, TXT, SOA, and CAA records, then grade SPF and DMARC email-auth health.
- [SSL/TLS Certificate Checker](https://pagechecks.com/tools/ssl-tls-certificate-checker/): Inspect a site's live SSL/TLS certificate: expiry, hostname (SAN) match, trust chain, HTTPS redirect, and HSTS.
- [Single-URL Indexability Checker](https://pagechecks.com/tools/single-url-indexability-checker/): Get a clear yes/no on whether Google can index one URL — and the exact reason it can't.
- [Favicon & Touch Icon Checker](https://pagechecks.com/tools/favicon-touch-icon-checker/): Detect and validate the full modern icon set: favicon.ico, rel=icon, apple-touch-icon, manifest icons, and theme-color.
- [Robots.txt Validator](https://pagechecks.com/tools/robots-txt-validator/): Validate robots.txt syntax and test URL allow/block behavior.
- [Robots.txt Generator](https://pagechecks.com/tools/robots-txt-generator/): Build robots.txt files with per-bot rules and AI crawler controls.
- [Redirect Checker](https://pagechecks.com/tools/redirect-checker/): Trace full redirect chains with status codes and timing.
- [XML Sitemap Validator](https://pagechecks.com/tools/sitemap-validator/): Validate sitemap format, URL entries, and namespace compliance.
- [XML Sitemap Generator](https://pagechecks.com/tools/sitemap-generator/): Generate a clean XML sitemap for your site and export sitemap.xml instantly.
- [HTTP Header Checker](https://pagechecks.com/tools/http-header-checker/): Inspect cache, security, and content-type headers.
- [Canonical URL Checker](https://pagechecks.com/tools/canonical-checker/): Compare canonical tags and final URLs to detect canonical conflicts.
- [Hreflang Validator + Cluster Checker](https://pagechecks.com/tools/hreflang-validator-cluster-checker/): Validate hreflang clusters, return tags, canonicals, and sitemap alignment.
- [Technical SEO Audit](https://pagechecks.com/tools/free-instant-website-seo-audit/): Run a fast technical SEO audit on any page to find indexing, redirect, canonical, performance, and on-page issues in one scored report.
- [Core Web Vitals Checker](https://pagechecks.com/tools/core-web-vitals-checker/): Fetch real-user CrUX metrics for LCP, INP, and CLS.
- [Site-Wide Broken Link Checker](https://pagechecks.com/tools/site-wide-broken-link-checker/): Crawl a site and flag broken internal and external URLs.
- [Internal Link Graph + Orphan Finder](https://pagechecks.com/tools/internal-link-graph-orphan-page-finder/): Map internal links and find orphan pages.
- [Batch Indexability Checker](https://pagechecks.com/tools/batch-indexability-checker/): Check indexability signals for many URLs at once.
- [Domain Health + Tech Stack Checker](https://pagechecks.com/tools/domain-health-tech-stack-checker/): Audit DNS email-auth records, SSL expiry, RDAP age, and detect web stack signatures.

## Tools: AI SEO
- [AI Answer Engine Schema Builder](https://pagechecks.com/tools/ai-answer-schema-builder/): Build QAPage, speakable, ClaimReview, and Dataset JSON-LD for answer engines.
- [AI Content Freshness Auditor](https://pagechecks.com/tools/ai-content-freshness-auditor/): Cross-check visible dates, JSON-LD, Last-Modified, and sitemap lastmod for stale or conflicting freshness signals.
- [Passage & Chunk Optimization Checker](https://pagechecks.com/tools/passage-chunk-optimization-checker/): Segment a page into retrieval chunks and score each for AI extractability.
- [Comparison Table Extractability Auditor](https://pagechecks.com/tools/comparison-table-extractability-auditor/): Score how cleanly AI can extract your HTML comparison tables.
- [AI Discovery Files Checker](https://pagechecks.com/tools/ai-discovery-files-checker/): Probe the well-known AI and agent discovery files a domain should expose.
- [Quotable Statement Density](https://pagechecks.com/tools/quotable-statement-density/): Score how many sentences are liftable, citation-ready statements.
- [AI Readiness Checker](https://pagechecks.com/tools/ai-readiness-checker/): Check whether AI crawlers can access your content and whether your pages are easy for LLMs to parse.
- [Agent Protocol Readiness Checker](https://pagechecks.com/tools/agent-protocol-readiness/): Audit site readiness for AI agents and MCP protocols.
- [LLMs.txt Generator + Validator](https://pagechecks.com/tools/llms-txt-generator-validator/): Generate and validate LLMs.txt with bot directives.
- [AI Bot Path Tester](https://pagechecks.com/tools/ai-bot-path-tester/): Test AI bot path access against robots.txt and x-robots-tag.
- [LLMs.txt Drift Monitor](https://pagechecks.com/tools/llms-txt-drift-monitor/): Compare llms.txt links against sitemap URLs for drift.
- [Answer Extractability Checker](https://pagechecks.com/tools/answer-extractability-checker/): Score how easily answer engines can extract page answers.
- [Citation Readiness Analyzer](https://pagechecks.com/tools/citation-readiness-analyzer/): Measure attribution, source, and citation signals on a page.
- [Entity Coverage Mapper](https://pagechecks.com/tools/entity-coverage-mapper/): Map on-page entities against schema coverage signals.
- [Content Intelligence Suite](https://pagechecks.com/tools/content-intelligence-suite/): Visualize heading hierarchy, readability, keywords, entities, AI snippets, and freshness.
- [AI Text Humanizer](https://pagechecks.com/tools/ai-text-humanizer/): Clean invisible characters, punctuation fingerprints, and AI filler without rewriting the text.
- [Topical Authority Mapper](https://pagechecks.com/tools/topical-authority-mapper/): Cluster crawled pages by dominant topic keywords and visualize coverage gaps.

## Comparisons
- [PageChecks vs Ahrefs](https://pagechecks.com/vs/ahrefs/): Compare PageChecks with Ahrefs when you need a free browser-based alternative for audits, metadata QA, AI SEO checks, and technical diagnostics.
- [PageChecks vs Screaming Frog](https://pagechecks.com/vs/screaming-frog/): Compare PageChecks with Screaming Frog when you want a free browser-based alternative for SEO audits, redirects, broken links, and AI SEO checks.
- [PageChecks vs SEOptimer](https://pagechecks.com/vs/seoptimer/): Compare PageChecks with SEOptimer when you need a free browser-based alternative for audits, technical diagnostics, and AI SEO workflows.
- [PageChecks vs Semrush](https://pagechecks.com/vs/semrush/): Compare PageChecks with Semrush when you want a free browser-based alternative for technical SEO audits, content QA, and AI visibility checks.
- [PageChecks vs Moz](https://pagechecks.com/vs/moz/): Compare PageChecks with Moz when you need a free alternative focused on technical diagnostics, metadata QA, and AI SEO checks.
- [PageChecks vs Sitebulb](https://pagechecks.com/vs/sitebulb/): Compare PageChecks with Sitebulb when you need a free browser-based alternative for technical SEO checks, audits, and AI visibility workflows.
- [PageChecks vs Ubersuggest](https://pagechecks.com/vs/ubersuggest/): Compare PageChecks with Ubersuggest when you need a free browser-based alternative for audits, technical SEO checks, and AI visibility workflows.

## Blog
- [Common Technical SEO Issues That Kill Rankings](https://pagechecks.com/blog/common-technical-seo-issues-that-kill-rankings/): The technical SEO problems that most often hurt crawl quality, indexation, and ranking potential across real sites.
  Summary: Some technical SEO issues are annoying. Others quietly suppress rankings across entire sections. This guide covers the patterns that do the most damage and how to spot them early.
- [llms.txt Explained: What It Is and Whether You Need It](https://pagechecks.com/blog/do-you-need-llms-txt/): llms.txt is a proposed guide that points AI systems to a site's most useful pages. Learn what it does, what it cannot do, and why most sites probably do not need it.
  Summary: llms.txt gives AI systems a curated list of important pages, but evidence shows no clear search-visibility benefit. See when it helps and when to skip it.
- [What Is ClaudeBot? GPTBot vs ChatGPT-User vs ClaudeBot Explained](https://pagechecks.com/blog/gptbot-vs-chatgpt-user-vs-claudebot/): ClaudeBot is Anthropic's training crawler. Learn how it differs from Claude-User, Claude-SearchBot, GPTBot, ChatGPT-User, and other AI search bots.
  Summary: ClaudeBot is Anthropic's training crawler, not its live retrieval bot. Compare ClaudeBot with GPTBot, ChatGPT-User, and the search agents controlled separately in robots.txt.
- [How to Check if AI Crawlers Can Access Your Site](https://pagechecks.com/blog/how-to-check-if-ai-crawlers-can-access-your-site/): A practical workflow for checking whether GPTBot, ChatGPT-User, ClaudeBot, PerplexityBot, and other AI crawlers can reach your pages.
  Summary: If you want your pages cited in AI search, first confirm the bots can actually fetch them. This guide shows how to audit robots.txt, path-level rules, and page-level signals without guessing.
- [How to Optimize Your Site for AI Citations](https://pagechecks.com/blog/how-to-optimize-your-site-for-ai-citations/): A practical guide to making your pages easier for ChatGPT, Perplexity, Claude, and AI Overviews to quote and cite.
  Summary: Getting crawled is only the first step. If you want citations from AI systems, your content also needs clear structure, explicit answers, and machine-readable signals.
- [How to Prioritize Technical SEO Issues After an Audit](https://pagechecks.com/blog/how-to-prioritize-technical-seo-issues-after-an-audit/): A practical framework for deciding which technical SEO issues to fix first after an audit instead of treating every warning as equally urgent.
  Summary: A technical SEO audit is only useful if you can separate urgent issues from background noise. This guide shows how to rank findings by impact, scope, and next action.
- [How to Run a Technical SEO Audit Without Wasting Time](https://pagechecks.com/blog/how-to-run-a-technical-seo-audit-without-wasting-time/): A practical technical SEO audit workflow for checking the right pages, finding the highest-impact issues, and avoiding noisy audit busywork.
  Summary: A technical SEO audit only helps if it leads to action. This guide shows how to run a fast audit, choose the right sample, and focus on the issues that actually change rankings and crawl quality.
- [Site Migration SEO Checklist: A Technical SEO Checklist for Launch](https://pagechecks.com/blog/technical-seo-checklist-for-site-migrations/): Use this site migration SEO checklist as a technical SEO checklist for redirects, canonicals, internal links, sitemaps, launch checks, and ranking recovery.
  Summary: A practical site migration SEO checklist covering the technical SEO checks to run before launch, on release day, and throughout ranking recovery.
- [What a Technical SEO Audit Should Actually Check](https://pagechecks.com/blog/what-a-technical-seo-audit-should-actually-check/): The checks that belong in a real technical SEO audit, and the ones that usually add noise without adding decision value.
  Summary: A useful technical SEO audit is not a giant list of random checks. This guide breaks down the signals that matter most for crawling, indexing, page quality, and follow-up prioritization.
- [What Blocks AI Visibility in robots.txt](https://pagechecks.com/blog/what-blocks-ai-visibility-in-robots-txt/): The robots.txt mistakes that most often remove pages from AI retrieval and citation workflows.
  Summary: A single broad Disallow rule can quietly wipe out your AI visibility on the pages that matter most. This guide shows the patterns that cause the biggest problems.
- [Agent Readiness: How to Prepare Your Site for the Agentic Web](https://pagechecks.com/blog/agent-readiness-how-to-prepare-your-site-for-ai-agents/): A walkthrough of the new Agent Protocol Readiness Checker from PageChecks: Markdown negotiation, MCP, WebMCP, OAuth discovery, Web Bot Auth, x402, ACP, UCP, and MPP.
  Summary: AI agents now browse, buy, and book on behalf of users. Our new Agent Protocol Readiness Checker runs 20+ probes so you can see where your site is missing the signals agents expect.
- [The Complete Guide to Answer Engine Optimization (AEO) and GEO](https://pagechecks.com/blog/the-complete-guide-to-answer-engine-optimization-aeo/): A deep guide to Answer Engine Optimization and Generative Engine Optimization. Learn how to structure content, improve extractability, and earn citations in AI-driven search.
  Summary: Search is no longer a list of links. This guide shows you how to structure content for direct answers, AI citations, retrieval pipelines, and modern search visibility.

## Policies
- [Privacy Policy](https://pagechecks.com/privacy-policy/): Privacy disclosures for the website, shared audits, and Chrome extension.
- [Terms of Service](https://pagechecks.com/terms-of-service/): Terms governing use of PageChecks tools, data inputs, and shared audit links.