How to Find and Fix 11 Common SEO Issues Using Chrome DevTools
Search engine optimization doesn't require expensive tools. Your browser's built-in developer tools can identify and diagnose most SEO problems in under 15 minutes. Here are the 11 most impactful SEO checks you can run directly from Chrome DevTools. 1. Check Meta Description Length Right-click any element, Inspect, expand <head> , find <meta name="description"> . Metric Optimal Range Meta description length 120-155 characters Title tag length 50-60 characters H1 count per page Exactly 1 const meta = document . querySelector ( ' meta[name="description"] ' ); const len = meta ? meta . content . length : 0 ; console . log ( `Meta description: ${ len } chars` ); 2. Verify Only One H1 Tag Exists const h1s = document . querySelectorAll ( ' h1 ' ); console . log ( `H1 count: ${ h1s . length } ` ); A study of 1.2 million pages found pages with one H1 ranked 12% higher on average. 3. Find Images Missing Alt Text const imgs = document . querySelectorAll ( ' img ' ); const missing = [... imgs ]. filter ( i => ! i . alt || i . alt . trim () === '' ); console . log ( ` ${ missing . length } of ${ imgs . length } images missing alt text` ); Pages with complete alt text see 3.7% higher image search visibility. 4. Detect Render-Blocking Resources Open DevTools, Network tab, reload, click "Blocking" filter. Resources in red block first contentful paint. Total blocking time under 200ms More than 20 render-blocking resources signals a problem Each render-blocking CSS file adds 50-300ms to page load 5. Check Canonical Tag Consistency const canonical = document . querySelector ( ' link[rel="canonical"] ' ); console . log ( canonical ? `Canonical: ${ canonical . href } ` : ' No canonical tag ' ); 6. Audit Internal Links const links = [... document . querySelectorAll ( ' a[href] ' )]; const internal = links . filter ( l => { try { return new URL ( l . href ). hostname === window . location . hostname ; } catch ( e ) { return false ; } }); console . log ( `Internal links: ${ internal . len