Kestrel SEO – On-Page Audit, Technical SEO & AI Search Checker

Free one-click SEO audits: on-page, technical, SERP and AI-search readiness checks for any page, right in your browser.

Kestrel SEO is a free, all-in-one SEO audit extension that helps you analyze webpages, identify issues, and improve website performance. Get a detailed 0-100 audit score, an indexability assessment, and actionable recommendations directly in your browser. Built for SEO professionals, website owners, developers, and content teams, Kestrel brings essential website analysis tools into one convenient workspace. Run an audit from the toolbar popup or use the side panel to keep your results visible as you navigate between pages. No account required. No subscription. No paywall. ON-PAGE SEO ANALYSIS Understand how well each page is optimized and what needs attention. - Get an instant audit score with prioritized errors, warnings, and practical recommendations. - Review page titles, meta descriptions, canonical URLs, and indexing directives. - Preview how your pages may appear in desktop and mobile search results, with a live snippet editor. - Check essential page elements, including language settings, viewport configuration, and favicons. - See the current page's audit score directly on the toolbar badge. CONTENT AND LINK ANALYSIS Explore page structure and identify opportunities to improve content and navigation. - Inspect the complete heading hierarchy and highlight headings directly on the webpage. - Analyze word count, estimated reading time, readability, and text-to-HTML ratio. - Explore keyword frequency and phrase usage across important page elements. - Review internal and external links in a searchable table with filtering options. - Detect broken links and redirects, highlight links on the page, and export findings to CSV. IMAGE AND STRUCTURED DATA CHECKS Find common image optimization issues and review structured data implementation. - Identify images with missing alternative text, unspecified dimensions, or potentially inefficient loading. - Inspect image details and locate individual images directly on the webpage. - Review structured data, including JSON-LD, microdata, and RDFa. - Check supported rich result properties and open external validation tools. - Export image findings for further review. TECHNICAL SEO AND PAGE PERFORMANCE Investigate technical signals that affect crawling, indexing, usability, and loading performance. - Inspect HTTP response codes, redirect chains, and important response headers. - Evaluate indexability using available crawling and indexing directives. - Explore robots.txt rules and discover XML sitemaps. - Review hreflang annotations and identify potential implementation issues. - Examine Core Web Vitals and available performance metrics, including LCP, INP, and CLS. - Analyze resource sizes, third-party requests, caching, compression, and detected technologies. - Optionally access available real-user performance data using your own API key. SEARCH VISIBILITY AND AI DISCOVERY Understand how your pages are presented to search engines and automated crawlers. - Review technical signals relevant to search and AI-powered discovery. - Inspect crawler access rules and detect the presence of an llms.txt file. - Compare initial HTML with rendered content to identify JavaScript-dependent information. - Examine content attribution signals, including authorship and publication dates. - Preview social sharing metadata and how links may appear across social platforms. SEARCH RESULTS AND PRODUCTIVITY TOOLS Streamline everyday research, reporting, and website reviews. - Add result numbering and improve visibility of advertisements in supported search results. - Highlight selected domains and export search results for further analysis. - Copy related search questions and launch localized searches. - Generate a shareable HTML audit report or copy a Markdown summary. - Open external research and website analysis services directly from the current page. - Use page highlighters, context-menu actions, and keyboard shortcuts. - Choose between light and dark themes. BUILT FOR YOUR WORKFLOW Kestrel works directly in your browser, without requiring a separate dashboard. Whether you're checking a single page, investigating a technical issue, reviewing content, or preparing a client report, your essential tools are always within reach. The extension is free to use, requires no registration, and is designed with privacy in mind. Install Kestrel SEO to make everyday website audits faster, clearer, and easier to act on.