SEO Tool - Website SEO Checker

Advanced SEO Checker Chrome Extension for Technical SEO, On-Page SEO, Core Web Vitals & Website Audits.

SEO Tools – Website SEO Checker SEO Tools helps you analyze webpages directly in Chrome. It brings together detailed checks for on-page SEO, technical SEO, performance, Core Web Vitals, security, mobile implementation, advanced website information, and E-E-A-T signals. Review the available information on a webpage from one convenient interface and identify areas that may require further attention. ━━━━━━━━━━━━━━━━━━━━ ★ ON-PAGE SEO ━━━━━━━━━━━━━━━━━━━━ ✓ SEO Title Checker Check the page title, confirm whether a title is present, and review its length. ✓ Meta Description Checker Review the page meta description and its available information. ✓ Heading Structure Analyzer Inspect H1, H2, H3, H4, H5, and H6 headings to understand the page's heading hierarchy. ✓ Image Alt Text Checker Review image alternative text and identify images that may not have useful alt attributes. ✓ Image Dimensions & Aspect Ratio Check image dimensions and identify images without declared dimensions that may affect layout stability. ✓ Responsive Image Checker Review responsive image implementation, including srcset, sizes, responsive image variants, and picture-based delivery. ✓ Image Format Checker Identify image formats and review the use of modern formats such as WebP and other optimized formats. ✓ Favicon Checker Check favicon implementation and related website icon configuration. ✓ Open Graph Checker Inspect Open Graph information including title, description, URL, image, image dimensions, secure image URL, image alt text, type, site name, and locale. ✓ Twitter/X Metadata Checker Review available Twitter/X card information, including card, title, description, image, site, and creator metadata. ✓ Keyword Usage Analyzer Review keyword usage across page content, meta description, title, H1, headings, and URL-related signals. ✓ Structured Data Checker Inspect JSON-LD and structured data implementation, including detected schema types, valid blocks, required properties, and recommended properties. ━━━━━━━━━━━━━━━━━━━━ ★ TECHNICAL SEO ━━━━━━━━━━━━━━━━━━━━ ✓ Robots.txt Checker Review robots.txt availability and information when it can be verified. ✓ XML Sitemap Checker Check sitemap availability and review available sitemap information. ✓ Canonical URL Checker Identify and inspect the canonical URL declared by the webpage. ✓ Indexability Checker Check page-level indexing directives and review whether the page is configured for indexing. ✓ Nofollow Link Checker Analyze links and identify nofollow, sponsored, and UGC link attributes. ✓ Meta Refresh Checker Detect meta refresh usage and identify pages using client-side refresh behavior. ✓ Character Encoding Checker Check the declared character encoding and UTF-8 implementation. ✓ Deprecated HTML Checker Detect deprecated HTML tags and review HTML markup quality. ✓ JavaScript & Resource Error Checker Check for JavaScript, console, and resource-related errors detected during analysis. ✓ Desktop Readiness Checker Review desktop page structure, word count, H1 usage, and available desktop layout information. ✓ Custom 404 Checker Check whether the website provides an appropriate custom 404 page. ✓ URL Redirect Checker Analyze URL redirect behavior and identify redirect chains or unnecessary redirects when server-side verification is available. ━━━━━━━━━━━━━━━━━━━━ ★ PERFORMANCE & CORE WEB VITALS ━━━━━━━━━━━━━━━━━━━━ ✓ Page Objects Analyzer Analyze page objects including HTML, JavaScript, CSS, images, SVGs, fonts, media, and iframes. ✓ JavaScript Error Checker Detect JavaScript errors that may affect page functionality. ✓ HTML Size Analyzer Measure HTML document size and identify potentially excessive HTML payloads. ✓ DOM Size Analyzer Analyze total DOM elements, DOM depth, div count, script count, and style sources. ✓ HTTP Request Analyzer Review resource requests including JavaScript, CSS, images, fonts, and other resources. ✓ Page Weight Analyzer Review measured page weight and available resource-size information. ✓ Compression Checker Review whether server-side compression such as gzip or Brotli can be verified. ✓ CDN Usage Checker Identify CDN and external delivery hosts referenced by the webpage. ✓ Browser Caching Checker Review caching-related headers such as Cache-Control, Expires, ETag, and Last-Modified when server-side information is available. ✓ JavaScript Minification Checker Check whether JavaScript appears to be minified. ✓ CSS Minification Checker Check whether CSS appears to be minified. ✓ Render-Blocking Resource Checker Identify blocking resources detected in the document head. ✓ Page Speed Analysis Review available page-speed information and identify when additional live-page or server-side measurement may be required. ✓ LCP Checker Analyze Largest Contentful Paint (LCP) information and review the detected LCP candidate. ✓ INP Checker Analyze Interaction to Next Paint (INP) information and identify potential interaction-performance concerns. ✓ CLS Checker Analyze Cumulative Layout Shift (CLS) information and identify media elements that may lack reserved dimensions. ━━━━━━━━━━━━━━━━━━━━ ★ SECURITY & WEB PROTOCOLS ━━━━━━━━━━━━━━━━━━━━ ✓ HTTPS Checker Verify whether the analyzed webpage is served over HTTPS. ✓ Mixed Content Checker Identify insecure resources loaded by an HTTPS webpage. ✓ SSL/TLS Checker Review SSL/TLS certificate information when server-side certificate verification is available. ✓ HTTP/2 & HTTP/3 Information Review HTTP protocol information when it can be verified through server-side or network-level analysis. ✓ Plaintext Email Checker Identify email addresses exposed directly in webpage HTML. ✓ External Link Security Checker Review external links and identify target="_blank" links that may require security attributes such as rel="noopener noreferrer". ━━━━━━━━━━━━━━━━━━━━ ★ MOBILE SEO & USABILITY ━━━━━━━━━━━━━━━━━━━━ ✓ Mobile Optimization Checker Review mobile readiness and responsive implementation signals. ✓ Viewport Checker Check viewport configuration and mobile scaling settings. ✓ Responsive Media Query Checker Review available responsive CSS and media-query implementation. ✓ Mobile Usability Checker Review mobile usability signals and viewport configuration relevant to mobile browsing. ━━━━━━━━━━━━━━━━━━━━ ★ ADVANCED WEBSITE ANALYSIS ━━━━━━━━━━━━━━━━━━━━ ✓ Google Analytics Detection Detect available Google Analytics implementation. ✓ Analytics Detection Identify available analytics snippets and measurement technologies. ✓ SPF Checker Review SPF information associated with the website when DNS or server-side verification is available. ✓ ads.txt Checker Check ads.txt availability and review its HTTP response, content type, and DIRECT/RESELLER information when server-side access is available. ✓ Backlink Analysis Provide backlink-related analysis when backlink data is available through a supported data source or API. ━━━━━━━━━━━━━━━━━━━━ ★ E-E-A-T ANALYSIS ━━━━━━━━━━━━━━━━━━━━ ✓ E-E-A-T Quality Score Review available Experience, Expertise, Authoritativeness, and Trustworthiness signals and provide a combined assessment. ✓ Author Attribution Checker Check for visible author attribution and Person/author-related schema information. ✓ Publication & Update Date Checker Check for publication and modification dates and relevant date properties. ✓ Real-World Experience Signals Look for experience signals such as case studies, project portfolios, and real-world outcome evidence. ✓ Author Credentials Checker Review available author credentials such as job title, qualifications, credentials, and related Person schema properties. ✓ FAQ & How-To Schema Checker Check for FAQPage and HowTo structured data. ✓ Authoritative Citation Checker Review outbound references to authoritative sources. ✓ About / Team Page Checker Check whether an About or Team page is linked and available. ✓ Organization Authority Signals Review Organization schema and sameAs connections to external profiles and authoritative sources. ✓ Review & Rating Schema Checker Check for Review and AggregateRating structured data. ✓ Awards, Press & Recognition Signals Identify available recognition, awards, press coverage, certifications, and social-proof signals. ✓ Breadcrumb Schema Checker Check for BreadcrumbList structured data and website navigation context. ✓ Privacy Policy Checker Check whether a Privacy Policy page is available and linked. ✓ Terms & Legal Page Checker Check for Terms of Service or other available legal information. ✓ Contact Information Checker Check whether contact information is accessible on the website. ✓ Business Address Checker Check for a physical business address in page content or structured data. ✓ HTTPS Trust Signal Review HTTPS/SSL as part of the available website trust signals. ✓ Editorial Transparency Checker Review available editorial policies, disclaimers, sponsorship disclosures, and transparency signals. ✓ Cookie & Privacy Consent Checker Check for available cookie consent and privacy-notice signals. ━━━━━━━━━━━━━━━━━━━━ ★ WEBSITE ANALYSIS IN ONE PLACE ━━━━━━━━━━━━━━━━━━━━ SEO Tools brings these website analysis capabilities together in one Chrome extension. You can inspect page structure, metadata, images, links, structured data, technical configuration, performance information, security signals, mobile implementation, website information, and available E-E-A-T signals without manually checking each element separately. The extension is intended to provide useful diagnostic and analytical information while you review and troubleshoot webpages. Some checks depend on information available from the webpage, browser environment, server response, DNS, external services, or supported APIs. When the required information is unavailable, a particular check may not be able to produce a result. SEO Tools does not guarantee search-engine rankings, indexing, traffic increases, or specific SEO results. ★ Developed by Unika Infocom © 2026 Unika Infocom Pvt. Ltd. All rights reserved.