The latest articles on DEV Community by x3xmaster (@x3xmaster). https://dev.to/x3xmaster https://media2.dev.to/dynamic/image/width=90,height=90,fit=cover,gravity=auto,format=auto/https:%2F%2Fdev-to-uploads.s3.us-east-2.amazonaws.com%2Fuploads%2Fuser%2Fprofile_image%2F1356164%2Ff4d3f3e5-9ca3-4d90-9b91-52d95a5fceff.png https://dev.to/x3xmaster en x3xmaster Tue, 10 Nov 2026 08:33:29 +0000 https://dev.to/x3xmaster/why-i-built-a-browser-based-seo-crawler-instead-of-another-cloud-tool-4ich https://dev.to/x3xmaster/why-i-built-a-browser-based-seo-crawler-instead-of-another-cloud-tool-4ich <p>Most SEO crawlers work by sending requests from remote servers. But what happens when a website relies heavily on JavaScript, requires authentication, runs on localhost, or is protected by a WAF?</p> <p>I wanted to explore a different approach.</p> <p>That's why I built SEOFixi — a technical SEO crawler that runs directly in the Chrome browser.</p> <p>Why a browser-based crawler?</p> <p>The idea was to use the actual browser environment instead of relying entirely on external crawling infrastructure.</p> <p><strong>This brings several practical advantages:</strong></p> <ul> <li>Fetch-based crawling — inspecting pages and resources through the browser environment.</li> <li>SPA support — working with JavaScript-powered websites and dynamically rendered content.</li> <li>Existing browser sessions — auditing pages accessible through an authenticated session.</li> <li>Localhost and staging — testing websites before deployment.</li> <li>Privacy-first processing — website data stays on the user's machine instead of being uploaded to external servers.</li> </ul> <p>This architecture is also designed with GDPR-related privacy requirements in mind.</p> <p>More than just crawling</p> <p><strong>SEOFixi currently includes 80+ technical SEO checks covering:</strong></p> <ul> <li>Titles, meta descriptions and headings.</li> <li>Broken links and redirects.</li> <li>Indexation and canonical URLs.</li> <li>Robots directives and structured data.</li> <li>Resources and performance diagnostics.</li> <li>Synthetic Core Web Vitals indicators.</li> </ul> <p>It also generates PDF and Excel audit reports directly in the browser.</p> <p><strong>The engineering challenge</strong></p> <p>The hardest part wasn't implementing individual SEO checks. It was combining crawling, page discovery, JavaScript rendering, browser security restrictions and reporting into one consistent workflow.</p> <p>I deliberately focused on technical SEO diagnostics rather than building another all-in-one marketing platform.</p> <p>Not everyone needs an expensive enterprise SEO subscription just to understand what's wrong with their website.</p> <p>What's next?</p> <p>SEOFixi is a working Chrome extension, and I'm now looking for developers, SEO specialists and website owners willing to test it.</p> <p>I'd especially appreciate feedback from people working with JavaScript-heavy websites, authenticated environments and technically complex projects.</p> <p>Try SEOFixi:<br> <a href="https://seofixi.com" rel="noopener noreferrer">https://seofixi.com</a></p> <p>Chrome Extension:<br> <a href="https://chromewebstore.google.com/detail/seofixi-%E2%80%94-technical-seo-a/dpkkllafhcmemjcmebaeclnjhpcooib" rel="noopener noreferrer">https://chromewebstore.google.com/detail/seofixi-%E2%80%94-technical-seo-a/dpkkllafhcmemjcmebaeclnjhpcooib</a></p> <p><strong>I would appreciate any feedback!</strong></p> javascript seo tools webdev