SEO Checker

Tracking since Apr 23, 2026.

Changelog

• May 29, 2026
  description

  The rejection is specifically about the SMART BEHAVIOR section listing competitor/platform names. Remove that entire section and resubmit.
  
  ---
  
  SEO Checker – Fast On-Page SEO Audit
  
  Analyze any webpage instantly with automated SEO checks directly inside your browser. Review technical SEO, content structure, metadata, links, images, and structured data, all in one simple popup.
  
  No setup required. Open any page and start auditing.
  
  ---
  
  WHAT SEO CHECKER CHECKS
  
  Meta and Indexing
  • Title tags and length
  • Meta descriptions
  • Canonical tags
  • Noindex and robots directives
  • Duplicate or conflicting tags
  • OG image presence
  
  Content and Headings
  • H1 presence and heading structure
  • Duplicate headings
  • Word count
  • Keyword density and placement
  • Thin content signals
  • Hidden text detection
  • Copy heading hierarchy (H1 to H6)
  
  Technical SEO
  • HTTPS usage
  • Viewport and charset
  • HTML lang attribute
  • Favicon presence
  • URL structure issues
  • Mixed content warnings
  • DOM size and depth
  • Robots.txt check
  • Sitemap detection
  • llms.txt detection
  • Hreflang and international tags
  • Deprecated HTML usage
  • Iframes and page depth
  
  Performance
  • Render-blocking resources
  • Heavy JavaScript
  • Font loading issues
  • LCP hints
  
  Note: Built-in performance checks use browser timing data, not Core Web Vitals. For real Core Web Vitals use the PSI tab with a Google API key.
  
  Images
  • Missing alt text
  • Oversized and low resolution images
  • Responsive image usage
  • Lazy loading checks
  • Broken images
  • Image aspect ratio
  • LCP image detection
  • Image alt text visual highlighter to highlight missing alt images directly on the page
  
  Links
  • Internal and external links
  • Duplicate links
  • Empty anchor text
  • Nofollow usage
  • Broken link detection
  • Anchor text diversity
  • External link ratio
  • Visual link highlighter to highlight internal, external, and broken links on the page
  • Click any highlighted link to scroll and locate it instantly
  • Copy any link list as text in anchor: url format
  
  Structured Data
  • Schema markup detection
  • JSON-LD presence
  • Missing required fields
  • Empty schema values
  • Schema URL mismatch
  • Breadcrumb schema
  
  Social Tags
  • Open Graph tags
  • Twitter Cards
  • OG image dimensions and URL
  • OG URL vs canonical check
  • Social preview readiness
  
  ---
  
  HOW IT WORKS
  
  1. Open any webpage
  2. Click SEO Checker
  3. Audit runs instantly with live scan progress
  4. Review issues by category across Critical, Warnings, Info, and Passed
  5. Use Visual Tools to highlight links and images on the page
  6. Use Copy tools to export headings, meta tags, and link lists
  
  ---
  
  PRIVACY
  
  Runs entirely in your browser.
  • No tracking
  • No data collection
  • No data selling
  • No ads
  
  ---
  
  PRO: SEARCH CONSOLE
  
  Connect Google Search Console to view live search data per page.
  • Clicks, impressions, CTR, average position
  • Period over period and year over year comparison
  • New, gaining, and dropping queries
  • Device breakdown across desktop, mobile, and tablet
  • Top countries sending traffic
  • Search appearance showing rich result types your page appears in
  • Image search performance
  • Index status via URL Inspection API
  • Robots.txt and page fetch state
  • Country level filtering
  • 6 date range presets from 7 days to 16 months
  • CTR opportunity detection
  • Copy queries as CSV
  
  ---
  
  OPTIONAL: PAGE SPEED INSIGHTS
  
  Connect Google's PageSpeed Insights API for deeper analysis using your own free Google API key.
  • Lighthouse Scores showing Performance, Accessibility, Best Practices, and SEO from 0 to 100 with analysis and fix guidance
  • Core Web Vitals showing real user LCP, INP, CLS, FCP, and TTFB from Chrome UX Report with Good, Needs Work, and Poor ratings
  • Lighthouse Issues showing specific failing audits grouped by SEO vs Performance with actionable fixes
  • Knowledge Graph checking if your brand or topic is in Google's Knowledge Graph
  • NLP Entity Analysis showing what Google understands your page is about using Google's own Natural Language API
  
  Each section runs independently so you trigger only what you need.
  
  PSI requires a free Google Cloud API key. PageSpeed Insights, Chrome UX Report, and Knowledge Graph APIs are completely free with no billing account needed. NLP Entity Analysis requires a billing account on your Google Cloud project with a free tier of 5,000 units per month.
  
  Billing disclaimer: SEO Checker uses your own Google API key. We have no access to your key, your Google Cloud project, or your billing account. Any charges from Google Cloud are solely between you and Google. We are not responsible for any charges incurred through your use of Google APIs. Always set a budget alert in Google Cloud Console to avoid unexpected charges.
  
  ---
  
  PERMISSIONS
  • Storage saves scan results and settings per tab
  • Active Tab analyzes the current page
  • Identity is optional Google login for Search Console

  SEO Checker – Fast On-Page SEO Audit
  
  Analyze any webpage instantly with automated SEO checks directly inside your browser. Review technical SEO, content structure, metadata, links, images, and structured data, all in one simple popup.
  
  No setup required. Open any page and start auditing.
  
  ---
  
  WHAT SEO CHECKER CHECKS
  
  Meta and Indexing
  • Title tags and length
  • Meta descriptions
  • Canonical tags
  • Noindex and robots directives
  • Duplicate or conflicting tags
  • OG image presence
  
  Content and Headings
  • H1 presence and heading structure
  • Duplicate headings
  • Word count
  • Keyword density and placement
  • Thin content signals
  • Hidden text detection
  • Copy heading hierarchy (H1 to H6)
  
  Technical SEO
  • HTTPS usage
  • Viewport and charset
  • HTML lang attribute
  • Favicon presence
  • URL structure issues
  • Mixed content warnings
  • DOM size and depth
  • Robots.txt check
  • Sitemap detection
  • llms.txt detection
  • Hreflang and international tags
  • Deprecated HTML usage
  • Iframes and page depth
  
  Performance
  • Render-blocking resources
  • Heavy JavaScript
  • Font loading issues
  • LCP hints
  
  Note: Built-in performance checks use browser timing data, not Core Web Vitals. For real Core Web Vitals use the PSI tab with a Google API key.
  
  Images
  • Missing alt text
  • Oversized and low resolution images
  • Responsive image usage
  • Lazy loading checks
  • Broken images
  • Image aspect ratio
  • LCP image detection
  • Image alt text visual highlighter to highlight missing alt images directly on the page
  
  Links
  • Internal and external links
  • Duplicate links
  • Empty anchor text
  • Nofollow usage
  • Broken link detection
  • Anchor text diversity
  • External link ratio
  • Visual link highlighter to highlight internal, external, and broken links on the page
  • Click any highlighted link to scroll and locate it instantly
  • Copy any link list as text in anchor: url format
  
  Structured Data
  • Schema markup detection
  • JSON-LD presence
  • Missing required fields
  • Empty schema values
  • Schema URL mismatch
  • Breadcrumb schema
  
  Social Tags
  • Open Graph tags
  • Twitter Cards
  • OG image dimensions and URL
  • OG URL vs canonical check
  • Social preview readiness
  
  ---
  
  HOW IT WORKS
  
  1. Open any webpage
  2. Click SEO Checker
  3. Audit runs instantly with live scan progress
  4. Review issues by category across Critical, Warnings, Info, and Passed
  5. Use Visual Tools to highlight links and images on the page
  6. Use Copy tools to export headings, meta tags, and link lists
  
  ---
  
  PRIVACY
  
  Runs entirely in your browser.
  • No tracking
  • No data collection
  • No data selling
  • No ads
  
  ---
  
  PRO: SEARCH CONSOLE
  
  Connect Google Search Console to view live search data per page.
  • Clicks, impressions, CTR, average position
  • Period over period and year over year comparison
  • New, gaining, and dropping queries
  • Device breakdown across desktop, mobile, and tablet
  • Top countries sending traffic
  • Search appearance showing rich result types your page appears in
  • Image search performance
  • Index status via URL Inspection API
  • Robots.txt and page fetch state
  • Country level filtering
  • 6 date range presets from 7 days to 16 months
  • CTR opportunity detection
  • Copy queries as CSV
  
  ---
  
  OPTIONAL: PAGE SPEED INSIGHTS
  
  Connect Google's PageSpeed Insights API for deeper analysis using your own free Google API key.
  • Lighthouse Scores showing Performance, Accessibility, Best Practices, and SEO from 0 to 100 with analysis and fix guidance
  • Core Web Vitals showing real user LCP, INP, CLS, FCP, and TTFB from Chrome UX Report with Good, Needs Work, and Poor ratings
  • Lighthouse Issues showing specific failing audits grouped by SEO vs Performance with actionable fixes
  • Knowledge Graph checking if your brand or topic is in Google's Knowledge Graph
  • NLP Entity Analysis showing what Google understands your page is about using Google's own Natural Language API
  
  Each section runs independently so you trigger only what you need.
  
  PSI requires a free Google Cloud API key. PageSpeed Insights, Chrome UX Report, and Knowledge Graph APIs are completely free with no billing account needed. NLP Entity Analysis requires a billing account on your Google Cloud project with a free tier of 5,000 units per month.
  
  Billing disclaimer: SEO Checker uses your own Google API key. We have no access to your key, your Google Cloud project, or your billing account. Any charges from Google Cloud are solely between you and Google. We are not responsible for any charges incurred through your use of Google APIs. Always set a budget alert in Google Cloud Console to avoid unexpected charges.
  
  ---
  
  PERMISSIONS
  • Storage saves scan results and settings per tab
  • Active Tab analyzes the current page
  • Identity is optional Google login for Search Console

• May 29, 2026
  host_permissions

  https://www.googleapis.com/*, https://chromeuxreport.googleapis.com/*, https://kgsearch.googleapis.com/*, https://language.googleapis.com/*

  https://www.googleapis.com/*, https://searchconsole.googleapis.com/*, https://chromeuxreport.googleapis.com/*, https://kgsearch.googleapis.com/*, https://language.googleapis.com/*

• May 16, 2026
  description

  SEO Checker – Fast On-Page SEO Audit
  
  Analyze any webpage instantly with automated SEO checks directly inside your browser. Review technical SEO, content structure, metadata, links, images, and structured data in one simple popup.
  
  No setup required. Open any page and start auditing.
  
  ---
  
  WHAT SEO CHECKER CHECKS
  
  Meta & Indexing
  • Title tags and length
  • Meta descriptions
  • Canonical tags
  • Noindex and robots directives
  • Duplicate or conflicting tags
  
  Content & Headings
  • H1 presence and heading structure
  • Duplicate headings
  • Word count
  • Keyword usage
  • Thin content signals
  • Hidden text detection
  
  Technical SEO
  • HTTPS usage
  • Viewport and charset
  • HTML lang attribute
  • Favicon presence
  • URL structure issues
  • Mixed content warnings
  • DOM size
  
  Performance Hints
  • Render-blocking resources
  • Heavy scripts and assets
  • Font loading issues
  
  (Note: This is not a Core Web Vitals measurement tool)
  
  Images
  • Missing alt text
  • Oversized images
  • Responsive image usage
  • Lazy loading checks
  
  Links
  • Internal and external links
  • Duplicate links
  • Empty anchor text
  • Nofollow usage
  
  Structured Data
  • Schema markup detection
  • JSON-LD presence
  • Missing recommended fields
  
  Social Tags
  • Open Graph tags
  • Twitter Cards
  • Social preview readiness
  
  ---
  
  HOW IT WORKS
  
  1. Open any webpage
  2. Click SEO Checker
  3. Audit runs instantly
  4. Review issues by category
  
  ---
  
  PRIVACY
  Runs locally in your browser.
  • No tracking
  • No data collection
  • No data selling
  
  ---
  
  OPTIONAL: SEARCH CONSOLE
  Connect Google Search Console to view:
  • Clicks
  • Impressions
  • CTR
  • Average position
  • Query data
  
  ---
  
  PERMISSIONS
  • Storage – saves settings
  • Active Tab – analyzes current page
  • Identity – optional Google login

  The rejection is specifically about the SMART BEHAVIOR section listing competitor/platform names. Remove that entire section and resubmit.
  
  ---
  
  SEO Checker – Fast On-Page SEO Audit
  
  Analyze any webpage instantly with automated SEO checks directly inside your browser. Review technical SEO, content structure, metadata, links, images, and structured data, all in one simple popup.
  
  No setup required. Open any page and start auditing.
  
  ---
  
  WHAT SEO CHECKER CHECKS
  
  Meta and Indexing
  • Title tags and length
  • Meta descriptions
  • Canonical tags
  • Noindex and robots directives
  • Duplicate or conflicting tags
  • OG image presence
  
  Content and Headings
  • H1 presence and heading structure
  • Duplicate headings
  • Word count
  • Keyword density and placement
  • Thin content signals
  • Hidden text detection
  • Copy heading hierarchy (H1 to H6)
  
  Technical SEO
  • HTTPS usage
  • Viewport and charset
  • HTML lang attribute
  • Favicon presence
  • URL structure issues
  • Mixed content warnings
  • DOM size and depth
  • Robots.txt check
  • Sitemap detection
  • llms.txt detection
  • Hreflang and international tags
  • Deprecated HTML usage
  • Iframes and page depth
  
  Performance
  • Render-blocking resources
  • Heavy JavaScript
  • Font loading issues
  • LCP hints
  
  Note: Built-in performance checks use browser timing data, not Core Web Vitals. For real Core Web Vitals use the PSI tab with a Google API key.
  
  Images
  • Missing alt text
  • Oversized and low resolution images
  • Responsive image usage
  • Lazy loading checks
  • Broken images
  • Image aspect ratio
  • LCP image detection
  • Image alt text visual highlighter to highlight missing alt images directly on the page
  
  Links
  • Internal and external links
  • Duplicate links
  • Empty anchor text
  • Nofollow usage
  • Broken link detection
  • Anchor text diversity
  • External link ratio
  • Visual link highlighter to highlight internal, external, and broken links on the page
  • Click any highlighted link to scroll and locate it instantly
  • Copy any link list as text in anchor: url format
  
  Structured Data
  • Schema markup detection
  • JSON-LD presence
  • Missing required fields
  • Empty schema values
  • Schema URL mismatch
  • Breadcrumb schema
  
  Social Tags
  • Open Graph tags
  • Twitter Cards
  • OG image dimensions and URL
  • OG URL vs canonical check
  • Social preview readiness
  
  ---
  
  HOW IT WORKS
  
  1. Open any webpage
  2. Click SEO Checker
  3. Audit runs instantly with live scan progress
  4. Review issues by category across Critical, Warnings, Info, and Passed
  5. Use Visual Tools to highlight links and images on the page
  6. Use Copy tools to export headings, meta tags, and link lists
  
  ---
  
  PRIVACY
  
  Runs entirely in your browser.
  • No tracking
  • No data collection
  • No data selling
  • No ads
  
  ---
  
  PRO: SEARCH CONSOLE
  
  Connect Google Search Console to view live search data per page.
  • Clicks, impressions, CTR, average position
  • Period over period and year over year comparison
  • New, gaining, and dropping queries
  • Device breakdown across desktop, mobile, and tablet
  • Top countries sending traffic
  • Search appearance showing rich result types your page appears in
  • Image search performance
  • Index status via URL Inspection API
  • Robots.txt and page fetch state
  • Country level filtering
  • 6 date range presets from 7 days to 16 months
  • CTR opportunity detection
  • Copy queries as CSV
  
  ---
  
  OPTIONAL: PAGE SPEED INSIGHTS
  
  Connect Google's PageSpeed Insights API for deeper analysis using your own free Google API key.
  • Lighthouse Scores showing Performance, Accessibility, Best Practices, and SEO from 0 to 100 with analysis and fix guidance
  • Core Web Vitals showing real user LCP, INP, CLS, FCP, and TTFB from Chrome UX Report with Good, Needs Work, and Poor ratings
  • Lighthouse Issues showing specific failing audits grouped by SEO vs Performance with actionable fixes
  • Knowledge Graph checking if your brand or topic is in Google's Knowledge Graph
  • NLP Entity Analysis showing what Google understands your page is about using Google's own Natural Language API
  
  Each section runs independently so you trigger only what you need.
  
  PSI requires a free Google Cloud API key. PageSpeed Insights, Chrome UX Report, and Knowledge Graph APIs are completely free with no billing account needed. NLP Entity Analysis requires a billing account on your Google Cloud project with a free tier of 5,000 units per month.
  
  Billing disclaimer: SEO Checker uses your own Google API key. We have no access to your key, your Google Cloud project, or your billing account. Any charges from Google Cloud are solely between you and Google. We are not responsible for any charges incurred through your use of Google APIs. Always set a budget alert in Google Cloud Console to avoid unexpected charges.
  
  ---
  
  PERMISSIONS
  • Storage saves scan results and settings per tab
  • Active Tab analyzes the current page
  • Identity is optional Google login for Search Console

• May 16, 2026
  host_permissions

  https://www.googleapis.com/*

  https://www.googleapis.com/*, https://chromeuxreport.googleapis.com/*, https://kgsearch.googleapis.com/*, https://language.googleapis.com/*

• May 16, 2026
  short_description

  Instantly checks any page for 50 SEO issues: meta, headings, links, images, schema, performance, and more.

  Instantly checks any page for multiple SEO issues: meta, headings, links, images, schema, gsc performance, and more.

• May 5, 2026
  description

  SEO Checker – Fast On-Page SEO Audit for Any Website
  
  SEO Checker helps you analyze any webpage instantly with automated SEO checks directly inside your browser. Get clear insights for technical SEO, content quality, metadata, links, images, schema markup, and performance signals — all in one simple popup.
  
  No complicated setup. No confusing reports. Just open any page and start auditing.
  
  
  WHAT SEO CHECKER ANALYZES
  
  META & SEARCH SNIPPETS
  • Title tags and title length
  • Meta descriptions
  • Canonical tags
  • Noindex directives
  • Robots meta tags
  • Duplicate or conflicting tags
  
  CONTENT & HEADINGS
  • H1 presence
  • Heading hierarchy (H1–H6)
  • Duplicate headings
  • Thin content signals
  • Keyword usage checks
  • Word count
  • Hidden text detection
  
  TECHNICAL SEO
  • HTTPS / HTTP support
  • Viewport tag
  • Charset declaration
  • Language attribute
  • Favicon checks
  • URL structure issues
  • Mixed content warnings
  • DOM size and page complexity
  
  PERFORMANCE SIGNALS
  • Render-blocking resources
  • Largest Contentful Paint hints
  • Font loading best practices
  • Heavy scripts and assets
  • Speed-related page issues
  
  IMAGES & MEDIA
  • Missing alt text
  • Oversized images
  • Low-resolution images
  • Responsive image usage
  • Lazy loading checks
  • Aspect ratio issues
  
  LINKS
  • Internal and external link review
  • Duplicate links
  • Broken anchors
  • Empty anchor text
  • Nofollow checks
  • Link count overview
  
  STRUCTURED DATA
  • Schema markup detection
  • JSON-LD checks
  • Breadcrumb schema
  • Missing recommended fields
  
  SOCIAL TAGS
  • Open Graph tags
  • Twitter Cards
  • OG image checks
  • Social preview readiness
  
  
  HOW IT WORKS
  1. Visit any webpage
  2. Open SEO Checker
  3. Audit runs instantly
  4. Review issues by category and severity
  5. Improve your page faster
  
  
  PRIVACY FIRST
  Everything runs locally in your browser.
  • No tracking
  • No unnecessary data collection
  • No data selling
  • No account required for core features
  
  Your page analysis stays on your device.
  
  
  SEARCH CONSOLE INTEGRATION (OPTIONAL / Pro)
  Connect Google Search Console to view page performance data directly inside the extension. See useful metrics such as:
  • Clicks
  • Impressions
  • CTR
  • Average Position
  • Query insights
  • Trend comparisons
  
  
  LIGHTWEIGHT PERMISSIONS
  • Storage – save settings and results locally
  • Tabs – analyze the current page
  • Identity – optional Google login for Search Console
  
  
  Whether you manage your own website or audit client pages, SEO Checker helps you find issues quickly and make smarter SEO decisions — without expensive software.

  SEO Checker – Fast On-Page SEO Audit
  
  Analyze any webpage instantly with automated SEO checks directly inside your browser. Review technical SEO, content structure, metadata, links, images, and structured data in one simple popup.
  
  No setup required. Open any page and start auditing.
  
  ---
  
  WHAT SEO CHECKER CHECKS
  
  Meta & Indexing
  • Title tags and length
  • Meta descriptions
  • Canonical tags
  • Noindex and robots directives
  • Duplicate or conflicting tags
  
  Content & Headings
  • H1 presence and heading structure
  • Duplicate headings
  • Word count
  • Keyword usage
  • Thin content signals
  • Hidden text detection
  
  Technical SEO
  • HTTPS usage
  • Viewport and charset
  • HTML lang attribute
  • Favicon presence
  • URL structure issues
  • Mixed content warnings
  • DOM size
  
  Performance Hints
  • Render-blocking resources
  • Heavy scripts and assets
  • Font loading issues
  
  (Note: This is not a Core Web Vitals measurement tool)
  
  Images
  • Missing alt text
  • Oversized images
  • Responsive image usage
  • Lazy loading checks
  
  Links
  • Internal and external links
  • Duplicate links
  • Empty anchor text
  • Nofollow usage
  
  Structured Data
  • Schema markup detection
  • JSON-LD presence
  • Missing recommended fields
  
  Social Tags
  • Open Graph tags
  • Twitter Cards
  • Social preview readiness
  
  ---
  
  HOW IT WORKS
  
  1. Open any webpage
  2. Click SEO Checker
  3. Audit runs instantly
  4. Review issues by category
  
  ---
  
  PRIVACY
  Runs locally in your browser.
  • No tracking
  • No data collection
  • No data selling
  
  ---
  
  OPTIONAL: SEARCH CONSOLE
  Connect Google Search Console to view:
  • Clicks
  • Impressions
  • CTR
  • Average position
  • Query data
  
  ---
  
  PERMISSIONS
  • Storage – saves settings
  • Active Tab – analyzes current page
  • Identity – optional Google login

• May 5, 2026
  permissions

  storage, tabs, identity

  storage, activeTab, identity

• May 5, 2026
  short_description

  Instantly audit any webpage for SEO issues, content quality, technical errors, links, images, schema, and performance checks.

  Instantly checks any page for 50 SEO issues: meta, headings, links, images, schema, performance, and more.

• Apr 28, 2026
  description

  SEO Checker runs 50 automated checks on every page you visit, showing results instantly in the toolbar badge and popup.
  
  What it checks:
  
  Meta: title length, description, canonical, noindex, robots directives, cross-domain canonical
  Content: H1 tags, heading hierarchy, keyword density, word count, hidden text
  Technical: viewport, charset, lang attribute, favicon, HTTPS, mixed content, DOM size, URL issues
  Performance: render-blocking resources, LCP hints, font-display, page speed signals
  Social: Open Graph tags, Twitter Cards, OG image dimensions
  Schema: JSON-LD validation, breadcrumb structured data
  Media: image alt text, dimensions (CLS), formats, aspect ratio, low resolution, oversized images, lazy loading, video captions
  Links: link structure, duplicates, broken anchors, nofollow internal, empty anchor text, link count
  
  How it works:
  1. Navigate to any page
  2. Checks run automatically
  3. Badge shows issue count (red = critical, orange = warnings)
  4. Click the icon to see full results filtered by severity and category
  
  Every check runs locally in your browser. No data is sent anywhere. No account needed.
  
  Search Console Integration (Pro):
  Connect your Google Search Console for live performance data: clicks, impressions, CTR, average position, keyword rankings, index status, period comparisons, and year-over-year trends. All inside the same popup.
  
  Permissions:
  Only 3 permissions used: storage (save results locally), tabs (read current URL), identity (optional Google sign-in for Search Console). No browsing data is collected or transmitted.

  SEO Checker – Fast On-Page SEO Audit for Any Website
  
  SEO Checker helps you analyze any webpage instantly with automated SEO checks directly inside your browser. Get clear insights for technical SEO, content quality, metadata, links, images, schema markup, and performance signals — all in one simple popup.
  
  No complicated setup. No confusing reports. Just open any page and start auditing.
  
  
  WHAT SEO CHECKER ANALYZES
  
  META & SEARCH SNIPPETS
  • Title tags and title length
  • Meta descriptions
  • Canonical tags
  • Noindex directives
  • Robots meta tags
  • Duplicate or conflicting tags
  
  CONTENT & HEADINGS
  • H1 presence
  • Heading hierarchy (H1–H6)
  • Duplicate headings
  • Thin content signals
  • Keyword usage checks
  • Word count
  • Hidden text detection
  
  TECHNICAL SEO
  • HTTPS / HTTP support
  • Viewport tag
  • Charset declaration
  • Language attribute
  • Favicon checks
  • URL structure issues
  • Mixed content warnings
  • DOM size and page complexity
  
  PERFORMANCE SIGNALS
  • Render-blocking resources
  • Largest Contentful Paint hints
  • Font loading best practices
  • Heavy scripts and assets
  • Speed-related page issues
  
  IMAGES & MEDIA
  • Missing alt text
  • Oversized images
  • Low-resolution images
  • Responsive image usage
  • Lazy loading checks
  • Aspect ratio issues
  
  LINKS
  • Internal and external link review
  • Duplicate links
  • Broken anchors
  • Empty anchor text
  • Nofollow checks
  • Link count overview
  
  STRUCTURED DATA
  • Schema markup detection
  • JSON-LD checks
  • Breadcrumb schema
  • Missing recommended fields
  
  SOCIAL TAGS
  • Open Graph tags
  • Twitter Cards
  • OG image checks
  • Social preview readiness
  
  
  HOW IT WORKS
  1. Visit any webpage
  2. Open SEO Checker
  3. Audit runs instantly
  4. Review issues by category and severity
  5. Improve your page faster
  
  
  PRIVACY FIRST
  Everything runs locally in your browser.
  • No tracking
  • No unnecessary data collection
  • No data selling
  • No account required for core features
  
  Your page analysis stays on your device.
  
  
  SEARCH CONSOLE INTEGRATION (OPTIONAL / Pro)
  Connect Google Search Console to view page performance data directly inside the extension. See useful metrics such as:
  • Clicks
  • Impressions
  • CTR
  • Average Position
  • Query insights
  • Trend comparisons
  
  
  LIGHTWEIGHT PERMISSIONS
  • Storage – save settings and results locally
  • Tabs – analyze the current page
  • Identity – optional Google login for Search Console
  
  
  Whether you manage your own website or audit client pages, SEO Checker helps you find issues quickly and make smarter SEO decisions — without expensive software.

• Apr 28, 2026
  short_description

  Instantly checks any page for 50 SEO issues: meta, headings, links, images, schema, performance, and more.

  Instantly audit any webpage for SEO issues, content quality, technical errors, links, images, schema, and performance checks.

Permissions & access

Permissions

storageactiveTabidentity

Host access

https://www.googleapis.com/*, https://searchconsole.googleapis.com/*, https://chromeuxreport.googleapis.com/*, https://kgsearch.googleapis.com/*, https://language.googleapis.com/*

Screenshots