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Identify all technologies behind any website — CMS, frameworks, analytics, and more. Website Tech Scanner by Semalt Detect what technologies power any website — fast and easy with Website Tech Scanner by Semalt. Discover what powers any website in one click. Website Tech Scanner by Semalt instantly detects all technologies used to build a site — from CMS, frameworks, and analytics to eCommerce, security, and marketing tools. Each technology includes a short description and official link. Works in milliseconds — fast, free, and intuitive with neatly organized categories. ➋ Who can benefit from extension? ➣ SEO specialists & digital marketers Identify CMS, analytics, frameworks, and other tech behind competitors’ websites for better SEO insights. ➣ Web developers & QA testers Instantly detect front-end and back-end technologies, frameworks, and libraries to simplify debugging and audits. ➣ Content managers & editors Understand what CMS or plugins power each page to improve publishing workflows and compatibility checks. ➣ Business owners & entrepreneurs Analyze competitors’ websites, discover the tools they use, and find new ideas to enhance your online presence. ➣ Students & researchers Explore real-world websites to learn about modern web technologies, frameworks, and optimization methods. ➣ Everyday users Reveal what powers your favorite websites and learn how different platforms and technologies work. ➌ How to install the extension? It takes 5 (literally) seconds to install this extension in just several clicks: - Click #1 — Hit the Add to Chrome button - Click #2 — Add the extension - Click #3 — Click the Extensions button next to your profile pic - Click #4 — Pin Website Tech Scanner by Semalt to your toolbar by hitting the pushpin icon And now it’s there. ➍ How to get started with extension? Open any website in the Chrome browser tab, then left-click the Website Tech Scanner by Semalt icon in your Chrome extensions menu. In the extension window, you’ll see a complete list of all technologies used to build the website or page. Clicking on any specific technology opens its short description and an official link for more details. ➎ About Semalt Semalt has been providing SEO analytics data and SEO services since 2013. We’ve helped over 600,000 businesses grow so far and are ready to help yours. Learn more about Semalt at semalt.com/about. ➏ Privacy Policy Your privacy means everything to us. Website Tech Scanner by Semalt does NOT collect data on how you use Chrome, search, or navigate websites. It only uses the URL of the web page you enable it on, as well as additional elements associated with this page. Learn more about Semalt’s Privacy Policy at semalt.com/privacy-policy. ➐ Support If you have any questions, comments, or suggestions, contact us at extension@semalt.com or go to our Support page - semalt.com/support.
Site Inspector
Inspect. Analyze. Understand. All-in-one tool for web developers and SEO professionals. Comprehensive web analysis and insights. Site Inspector streamlines your workflow by providing instant access to essential website insights directly within your browser. This powerful extension runs conveniently in a side panel, ensuring it's always at hand without disrupting your browsing experience. Completely free and with no ads. 🔍 Meta Tag Analyzer Comprehensive analysis of meta tags including title, descriptions, Open Graph, Twitter Cards, and various verification tokens to enhance visibility on social media and search engines. 🧱 Heading Structure Visualization Instantly visualize and assess the structure and counts of all headings and subheadings (H1-H6) on a webpage to optimize content for better readability and SEO rankings. 🧬 Structured Data Inspection Extract and analyze JSON-LD structured data with direct links to schema.org definitions, enhancing your site’s presence with rich snippets in search results. 🖼️ Image Optimization Insights Evaluate and optimize images with detailed attributes like alt texts, titles, and loading types to improve page speed, accessibility, and overall user experience. 🔗 Comprehensive Link Analysis Deep dive into page links with advanced filtering options for texts, titles, follow status, and more, helping you refine your link strategy and enhance site navigation. 🕸️ Indexing & Crawling Tools Ensure your site is properly indexed and crawlable with tools to check canonical URLs, meta robots tags, HTTP headers, sitemaps, and robots.txt directives. 🌐 Favicon Checks Verify and optimize favicon implementations to improve site branding and ensure consistent display across browsers and devices. 📱 PWA Checks Evaluate Progressive Web App (PWA) setups, including Web App Manifests and Microsoft Pinned Sites configurations, to ensure optimal app-like functionality. 🛠️ Essential SEO Tools Access Gain quick access to top SEO tools for keyword research, backlink analysis, rank tracking, and comprehensive site audits directly within your browser. 📐 Responsive Design Testing Simulate different device screen sizes and breakpoints to ensure your site offers a seamless viewing experience across all devices, boosting engagement and conversions. 👤 Who Is It For Tailored for SEO Professionals, Web Developers, and Content Creators seeking detailed on-page SEO audits and optimizations. 🚀 Why Choose Site Inspector? Elevate your SEO efforts with in-depth insights and tools, save valuable time by auditing directly within your browser, and stay ahead of competitors with quick adaptations. 🔐 Permissions Explained "Read and change all your data on the websites you visit": Required to analyze elements on the pages you visit. 🔒 Privacy Policy Site Inspector doesn't collect or store any personal information. All analyses are performed locally on your device. Completely free and with no ads Made with ❤️ by Peta Sittek
Tech Detector Pro
Tech Detector Pro is a browser extension that instantly reveals the technology stack behind any website you visit. It is designed for developers, designers, web analysts, students, and tech enthusiasts who want to understand how websites are built. Analyze any webpage with a single click to discover: • Frontend frameworks and libraries • Backend technologies and servers • Content management systems • Analytics and tracking tools • Hosting providers and CDNs • CSS frameworks and UI libraries • JavaScript libraries and dependencies • One-Click Analysis – Scan the current tab instantly • Organized Results – Technologies grouped by category for easy reading • Scan History – Access your recent scans for quick reference • Export Options – Copy results, download as JSON, or share reports • Privacy-Focused – All analysis happens locally in your browser • Clean Interface – Modern and easy-to-use design 1. Navigate to any website 2. Click the extension icon in your browser toolbar 3. Press “Scan” to analyze the page 4. View results organized by technology category PERFECT FOR • No data collection or external tracking • All processing happens locally in your browser • No personal information is stored or transmitted Tech Detector Pro identifies technologies through DOM analysis, script inspection, and meta tag evaluation to provide clear and useful insights into how websites are built.
Uper SEO Auditor
All-in-one SEO auditor in your sidebar — meta tags, schema, links, images, 7K+ technologies and more. 100% local, no account needed. Uper SEO Auditor gives you a full on-page SEO audit directly in your browser's side panel — no tab switching, no external tools, no account needed. All analysis runs locally in your browser. 🔒 100% PRIVACY All data stays in your browser. No external servers, no tracking, no login required. Your data is yours. 🔍 WHAT YOU CAN ANALYZE META & CONTENT • Title, description, canonical URL, robots directives • Open Graph and Twitter Card validation with previews • Heading structure analysis (H1-H6 hierarchy) • Keyword density and readability scoring 📊 STRUCTURED DATA • JSON-LD schema detection and validation • Rich Results compatibility checking • Smart schema recommendations based on page type 🔗 LINKS • Internal and external link breakdown • Nofollow, sponsored, UGC attribute detection • Empty and broken link detection 🖼️ IMAGES & MEDIA • Alt text audit, dimensions, file size • Lazy loading and modern format detection • Oversized image warnings • CSS background-image analysis 🛠️ TECHNOLOGY DETECTION • Identify CMS, frameworks, libraries, analytics tools, CDNs and more • Over 7,000 technology signatures in the database • Version identification where available • Design system extraction — colors, fonts, spacing 📈 GOOGLE SERVICES • Detect analytics, tag management, ad services and other integrations • Event monitoring and categorization • Consent Mode v2 validation • DataLayer inspector 🍪 TRACKERS & COOKIES • Cookie identification against a database of 2,200+ known cookies • Privacy categorization and consent management detection • Storage analysis — localStorage, sessionStorage, IndexedDB • Tracking pixel and beacon detection ♿ ACCESSIBILITY • Automated WCAG 2.2 checks across 9 categories • Contrast ratio checking with font-size awareness • AI-powered fix suggestions you can paste into any AI assistant 🔐 SECURITY • HTTPS validation and security headers analysis • Cookie security flags audit 🌐 SITE ESSENTIALS • Check for robots.txt, sitemap.xml, security.txt, llms.txt, ads.txt • AI crawler access rules overview • Favicon and web manifest detection • Sitemap analyzer with CSV export 📤 EXPORT • Export reports to JSON, CSV, or PDF • Comprehensive PDF reports with SEO score ✨ WHY UPER? • Side panel — audit pages without leaving them • Fast — instant analysis on page load • Private — everything runs locally, zero data sent anywhere • Free — no account, no subscription, no limits • Lightweight — small package, fast install • Dark and light theme support What's New in 2.7.14: - RSS/Atom Feed Detection — Finds feeds from page HTML and common paths (/feed, /rss.xml, /atom.xml). Shows type, title, and URL in Site Essentials - Social Preview Fix — OG/Twitter image previews now load on sites with strict CORP headers What's New in 2.7.13: - llms.txt Detection & Validation — Detects llms.txt/llms-full.txt and validates against the spec - llms.txt Generator — Generate llms.txt from sitemap data with language selector, smart filtering, and AI optimization prompt - Sitemap Hreflang from HTML — Merges hreflang from page with sitemap XML data - Thumbnail CORP Fix — Fixed images not loading due to Content Security Policy blocking What's New in 2.7.12: - Sitemap AI Audit — One-click AI prompt with full audit: status breakdown, duplicates, content stats, and fix recommendations - Sitemap Metadata — Extracts lastmod, priority, changefreq, images, videos, hreflang with new CSV columns - Sitemap Redirects — Detects 301/302 redirects with final URL tracking - Sitemap Tabbed Preview — Overview, Changes, and External Links tabs with charts and CSV export - Sitemap PDF & Print — Save or print the full audit report from the preview page - Sitemap Filter Sorting — Duplicates grouped together, length issues sorted by severity - Sitemap Large Cache Fix — Sites with 4,000+ URLs no longer fail silently - A11y HTML Context — AI suggestions include parent HTML for easier issue location - A11y Accuracy — Fixed text-resize false positives, filtered third-party widgets - Canonical Hash Fix — No false warnings when URL contains a hash fragment - Page Stats — Full URLs with CSS truncation instead of cut-off filenames What's New in 2.7.11: • CLS text snippets fixed — Layout shift source previews • Code cleanup — Removed duplicate code across modules, reducing codebase duplication to under 1% • 30% smaller extension
SiteAnalyzer SEO Tools: Free Meta & SEO Checker
Free browser extension that helps you analyze website content, detect and fix all SEO-errors (links, images, meta, content, etc.). SiteAnalyzer SEO Tools is a free browser extension providing a set of tools for analyzing SEO indicators of web site, technical audit (links, images, meta tags, content, indexing, etc.), URL analysis and correction of SEO optimization errors. SiteAnalyzer SEO Tools is a convenient tool for webmasters and SEO specialists, including many parameters for checking the quality of the site and its pages, configured to identify the most popular SEO errors. The main features of SiteAnalyzer SEO Tools ✓ Determining the total number of site pages in the Google & Yahoo! index ✓ Checking the URL indexing status in Google and Bing ✓ Reveals the contents of Title, Description, H1-H6 tags ✓ Proper check of «Robots.txt» and «Sitemap.xml» presence ✓ Rules accounting for «Robots.txt», meta tag «Robots» and header «X-Robots-Tag» ✓ Canonical URL Checker ✓ Checking for REL «Nofollow», «Sponsored» and «UGC» for links and URLs ✓ Defining internal and external page links ✓ Semantic analysis of page content ✓ Checking pages loading speed ✓ Receiving server response codes (200, 3xx, 4xx, 5xx) ✓ Determining what CMS is used by web site ✓ Checking the registration date and the domain age ✓ Displaying all images of the page and the contents of the ALT tag ✓ Determining the IP address and country of web site ✓ Display Schema, Open Graph and Twitter markup ✓ Determining the presence of links to social networks ✓ Search for subdomains and sites on the same IP ✓ Extracting text Suggestions from Google Images ✓ Show duplicate H1-H6 headers ✓ SSL Certificate Verification ✓ DNS Domain Validation ✓ PageRank Calculation ✓ Sitemap Visualization ✓ Sitemap Clustering ✓ CSR vs SSR Site Rendering Visualization ✓ Schema.org Visualization (visualize JSON-LD schema markup) ✓ Google SERP Analysis (Organic, Advert, Local, Product, Video, Image, News, FAQ, PAA) ✓ TF-IDF Checker for Google SERP ✓ Core Web Vitals ✓ Quick Source Viewer ✓ Integration with Google Search Console ✓ Integration with SimilarWeb ✓ Page SEO Audit by 40 parameters ✓ Export reports to CSV and PNG How can the plugin help SEO specialist? ★ Checking the indexing of pages ★ Analysis of meta tags and page content ★ Search for technical bugs on the site The extension is distributed absolutely free and does not require any registration since it does not collect or send elsewhere your personal data. Updating the version An extension installed via the Chrome Online Store or through Firefox Add-ons are updated independently so no additional actions are required.
