Link Checker - Website Health & Audit

Website link intelligence, SEO audit, accessibility, security scanner, redirect chain analyzer & health assistant.

Link Checker is the ultimate all-in-one Chrome extension and website auditor for SEO professionals, web developers, agencies, and site owners. Instantly scan, audit, and optimize website links, detect 404 broken links, trace multi-hop redirect chains, inspect WCAG 2.1 accessibility compliance, and generate white-label client reports. Whether you are auditing a single web page, analyzing an entire sitemap.xml, verifying site migration redirect mappings, or monitoring endpoint uptime, Link Checker delivers fast, actionable website intelligence directly inside your browser. ================================================== ⚡ KEY FEATURES & CAPABILITIES ================================================== 🔍 REAL-TIME LINK & 404 BROKEN LINK SCANNER • Instantly inspects all internal and external hyperlinks on any web page. • Identifies 404 Not Found, 500 Server Errors, 301/302 Redirects, and 200 OK links. • Measures exact HTTP response latency (TTFB) and server response headers. • Offers 3-option actionable repair suggestions for fixing broken URLs. 🎨 IN-PAGE DOM LINK HIGHLIGHTER & DRAWER • Real-time visual overlay highlighting active page links: - 🟢 Green outline for 200 OK active links - 🟡 Yellow outline & badge for 301/302 redirects - 🔴 Red highlight & badge for 404 broken links • Mounts a sleek, floating drawer widget for quick stats and 1-click dashboard access. 📈 SEO LINK INTELLIGENCE & ANCHOR OPTIMIZER • Calculates internal vs. external link ratios with visual progress breakdown. • Detects non-descriptive generic anchor text ("click here", "read more", "link"). • Provides automated keyword optimization suggestions to maximize topical authority. • Tracks rel="nofollow", rel="sponsored", and rel="ugc" link attributes. 🕸️ INTERNAL LINK OPTIMIZER • Analyzes internal link depth and identifies under-linked or orphaned pages. • Generates automated source link recommendations to improve crawling & indexing. 🛡️ SECURITY & WCAG 2.1 ACCESSIBILITY AUDITOR • Flags insecure HTTP mixed content links on HTTPS websites. • Calculates HTTPS compliance percentage across all page assets. • Audits empty anchor tags, missing aria-labels, and duplicate link text destinations. 🔀 REDIRECT CHAIN TRACER • Traces multi-hop redirect loops (e.g. Page A -> 301 -> 302 -> Page B). • Calculates estimated page load latency delays caused by redirect hops. • Suggests direct destination URL updates to conserve crawl budget and PageRank. 🗺️ SITEMAP.XML AUDITOR • Parses sitemap.xml files directly from URLs or raw XML text. • Extracts all <loc> page URLs and executes concurrent health checks. 📦 BULK CSV URL CHECKER • Batch audits thousands of raw URLs or imported link lists. • Shows real-time progress text with instant CSV and JSON export capabilities. 🔀 WEBSITE MIGRATION ASSISTANT • Verifies old URL vs. new URL redirect mappings during domain or CMS migrations. • Highlights 404 errors, wrong target paths, and missing 301 redirects. 🎯 COMPETITOR LINK & OUTREACH OPPORTUNITY ANALYZER • Compares target domain backlinks against competitors. • Identifies broken backlink outreach opportunities for link building campaigns. ⏱️ UPTIME & ENDPOINT MONITORING • SaaS-style endpoint monitoring simulator for tracking uptime percentages. • Logs response time history and alerts on 504 Gateway Down endpoints. 🏢 AGENCY MULTI-CLIENT SUITE & WHITE-LABEL REPORTS • Manage multiple client domains, health scores, and audit histories. • Export white-label, customizable PDF or HTML client reports complete with executive health summaries and broken link tables. ================================================== 🔒 PRIVACY & PERMISSIONS ================================================== • Privacy First: All audits run directly inside your browser. • No Tracking: We never sell user data, track personal browsing history, or serve advertisements. • Host Permissions: Required solely to fetch web page status codes and headers for link health validation. Upgrade your website health, eliminate 404 errors, and boost SEO rankings today with Link Checker!