{"id":16713,"date":"2026-02-18T06:24:16","date_gmt":"2026-02-18T06:24:16","guid":{"rendered":"https:\/\/www.copebusiness.com\/?p=16713"},"modified":"2026-02-18T06:24:19","modified_gmt":"2026-02-18T06:24:19","slug":"technical-seo-checklist","status":"publish","type":"post","link":"https:\/\/www.copebusiness.com\/fr\/technical-seo\/liste-de-verification-technique\/","title":{"rendered":"Technical SEO Checklist for Migrating Large Websites"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">Migrating a large website is one of the most complex processes in technical SEO. Whether you\u2019re changing domains, redesigning your site, moving to a new CMS, or restructuring URLs, a poorly executed migration can lead to traffic loss, ranking drops, crawl errors, and indexing issues.<br><br>A structured technical SEO checklist ensures that search engines can crawl, index, and transfer ranking signals properly during and after the migration. This guide covers every critical step required to migrate large websites safely while preserving SEO equity.<\/p><div id=\"ez-toc-container\" class=\"ez-toc-v2_0_84 ez-toc-wrap-left counter-hierarchy ez-toc-counter ez-toc-grey ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title\" style=\"cursor:inherit\">On this page<\/p>\n<span class=\"ez-toc-title-toggle\"><a href=\"#\" class=\"ez-toc-pull-right ez-toc-btn ez-toc-btn-xs ez-toc-btn-default ez-toc-toggle\" aria-label=\"Toggle Table of Content\"><span class=\"ez-toc-js-icon-con\"><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">Toggle<\/span><span class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #0a0a0a;color:#0a0a0a\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewBox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #0a0a0a;color:#0a0a0a\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewBox=\"0 0 24 24\" version=\"1.2\" baseProfile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/span><\/span><\/a><\/span><\/div>\n<nav><ul class='ez-toc-list ez-toc-list-level-1 ' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/www.copebusiness.com\/fr\/technical-seo\/liste-de-verification-technique\/#Why_Technical_SEO_Matters_in_Website_Migration\" >Why Technical SEO Matters in Website Migration<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/www.copebusiness.com\/fr\/technical-seo\/liste-de-verification-technique\/#Pre-Migration_Technical_SEO_Checklist\" >Pre-Migration Technical SEO Checklist<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/www.copebusiness.com\/fr\/technical-seo\/liste-de-verification-technique\/#During_Migration_Technical_SEO_Checklist\" >During Migration Technical SEO Checklist<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/www.copebusiness.com\/fr\/technical-seo\/liste-de-verification-technique\/#Post-Migration_Technical_SEO_Checklist\" >Post-Migration Technical SEO Checklist<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/www.copebusiness.com\/fr\/technical-seo\/liste-de-verification-technique\/#Common_Migration_Mistakes_to_Avoid\" >Common Migration Mistakes to Avoid<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/www.copebusiness.com\/fr\/technical-seo\/liste-de-verification-technique\/#Best_Practices_for_Large_Website_Migration\" >Best Practices for Large Website Migration<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/www.copebusiness.com\/fr\/technical-seo\/liste-de-verification-technique\/#Final_Thoughts\" >Final Thoughts<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-8\" href=\"https:\/\/www.copebusiness.com\/fr\/technical-seo\/liste-de-verification-technique\/#Need_Help_With_Website_Migration\" >Need Help With Website Migration?<\/a><\/li><\/ul><\/nav><\/div>\n\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Why_Technical_SEO_Matters_in_Website_Migration\"><\/span>Why Technical SEO Matters in Website Migration<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Large websites often contain thousands \u2014 or even millions \u2014 of URLs. During migration, even small technical mistakes can multiply into major SEO issues, such as:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Broken internal links<\/li>\n\n\n\n<li>Lost backlinks<\/li>\n\n\n\n<li>Duplicate content<\/li>\n\n\n\n<li>Crawl inefficiencies<\/li>\n\n\n\n<li>Deindexed pages<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Following a proven SEO migration checklist minimizes these risks and ensures continuity in organic performance.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Pre-Migration_Technical_SEO_Checklist\"><\/span>Pre-Migration Technical SEO Checklist<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Preparation is the most important phase of any migration.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">1. Perform a Full Website Crawl<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Start by crawling your existing website to create a complete URL inventory.<br>Include:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Indexable pages<\/li>\n\n\n\n<li>Canonical URLs<\/li>\n\n\n\n<li>Redirected URLs<\/li>\n\n\n\n<li>Broken links<\/li>\n\n\n\n<li>Metadata<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Tools like Screaming Frog or Sitebulb can help extract this data. This crawl becomes your baseline for post-migration comparison.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">For deeper crawling insights, review:<br><a href=\"https:\/\/www.copebusiness.com\/technical-seo\/deeply-nested-pages-audit\/\">How to Audit Deeply Nested Pages for Better Crawl Efficiency<\/a><\/p>\n\n\n\n<h3 class=\"wp-block-heading\">2. Benchmark Current SEO Performance<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Document your existing SEO metrics before migration:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Organic traffic<\/li>\n\n\n\n<li>Keyword rankings<\/li>\n\n\n\n<li>Indexed pages<\/li>\n\n\n\n<li>Backlink profile<\/li>\n\n\n\n<li>Top-performing URLs<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">This helps you measure migration success and quickly identify losses.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">3. Backup Your Website<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Always create a full backup of:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Website files<\/li>\n\n\n\n<li>Databases<\/li>\n\n\n\n<li>Media assets<\/li>\n\n\n\n<li>CMS configurations<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Backups ensure you can restore your site if migration errors occur.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">4. Map Old URLs to New URLs<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">URL mapping is the backbone of migration SEO.<br>Create a spreadsheet containing:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Old URL<\/li>\n\n\n\n<li>New URL<\/li>\n\n\n\n<li>Redirect type (301)<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Every indexable old URL must point to the most relevant new page to preserve link equity.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"During_Migration_Technical_SEO_Checklist\"><\/span>During Migration Technical SEO Checklist<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">5. Implement 301 Redirects<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">301 redirects pass ranking signals from old URLs to new ones.<br>Best practices:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Avoid redirect chains<\/li>\n\n\n\n<li>Avoid redirect loops<\/li>\n\n\n\n<li>Redirect page-to-page (not all to homepage)<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">If you need help fixing redirect issues, see:<br><a href=\"https:\/\/www.copebusiness.com\/technical-seo\/redirect-chains-and-loops-seo\/\">Optimizing Redirect Chains and Loops for Better Rankings<\/a><\/p>\n\n\n\n<h3 class=\"wp-block-heading\">6. Update Internal Links<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Internal links should point directly to new URLs \u2014 not redirected ones.<br>Update:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Navigation links<\/li>\n\n\n\n<li>Footer links<\/li>\n\n\n\n<li>Contextual links<\/li>\n\n\n\n<li>Breadcrumbs<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Clean internal linking improves crawl efficiency and indexing speed.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">7. Migrate Metadata Properly<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Ensure all SEO metadata transfers correctly:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Title tags<\/li>\n\n\n\n<li>Meta descriptions<\/li>\n\n\n\n<li>Canonical tags<\/li>\n\n\n\n<li>Hreflang tags<\/li>\n\n\n\n<li>Structured data<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Missing metadata can cause ranking volatility post-migration.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">For structured markup implementation, read:<br><a href=\"https:\/\/www.copebusiness.com\/technical-seo\/structured-data-implementation\/\">Structured Data Implementation Guide<\/a><\/p>\n\n\n\n<h3 class=\"wp-block-heading\">8. Optimize XML Sitemaps<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Create fresh XML sitemaps containing only new URLs.<br>Submit them in Google Search Console to guide search engines toward updated pages quickly.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">9. Check Robots.txt &amp; Noindex Tags<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Common migration mistake: blocking the new site from crawlers.<br>Verify:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Robots.txt allows crawling<\/li>\n\n\n\n<li>Noindex tags removed from live pages<\/li>\n\n\n\n<li>Staging site remains blocked<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Post-Migration_Technical_SEO_Checklist\"><\/span>Post-Migration Technical SEO Checklist<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">10. Run a Post-Migration Crawl<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Crawl the new site to identify:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Broken links<\/li>\n\n\n\n<li>Missing redirects<\/li>\n\n\n\n<li>Duplicate content<\/li>\n\n\n\n<li>Orphan pages<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Compare this crawl with your pre-migration data.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">11. Monitor Indexing<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Use Google Search Console to track:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Coverage reports<\/li>\n\n\n\n<li>Indexed pages<\/li>\n\n\n\n<li>Excluded URLs<\/li>\n\n\n\n<li>Crawl anomalies<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Submit priority pages for faster indexing.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">12. Track Rankings &amp; Traffic<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Temporary fluctuations are normal, but major drops signal issues.<br>Monitor:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Keyword positions<\/li>\n\n\n\n<li>Organic sessions<\/li>\n\n\n\n<li>Conversion rates<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">13. Audit Backlinks<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Ensure high-value backlinks point to redirected URLs correctly.<br>If needed, reach out to referring domains to update links to new URLs.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">14. Monitor Crawl Budget<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Large migrations can strain crawl budget.<br>Improve efficiency by:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Fixing redirect chains<\/li>\n\n\n\n<li>Removing duplicate URLs<\/li>\n\n\n\n<li>Strengthening internal linking<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Common_Migration_Mistakes_to_Avoid\"><\/span>Common Migration Mistakes to Avoid<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Launching without redirects<\/li>\n\n\n\n<li>Blocking search engines<\/li>\n\n\n\n<li>Changing URL structure unnecessarily<\/li>\n\n\n\n<li>Ignoring internal links<\/li>\n\n\n\n<li>Forgetting sitemap updates<\/li>\n\n\n\n<li>Not benchmarking SEO metrics<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Avoiding these errors protects your rankings and traffic.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Best_Practices_for_Large_Website_Migration\"><\/span>Best Practices for Large Website Migration<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Test migration on staging first<\/li>\n\n\n\n<li>Migrate during low-traffic periods<\/li>\n\n\n\n<li>Keep URL structure consistent where possible<\/li>\n\n\n\n<li>Communicate changes with stakeholders<\/li>\n\n\n\n<li>Monitor SEO daily post-launch<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Final_Thoughts\"><\/span>Final Thoughts<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Migrating a large website without an SEO checklist is extremely risky. Rankings, backlinks, and crawl signals built over years can vanish overnight if technical steps are missed.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">By following this powerful technical SEO checklist \u2014 from URL mapping and redirects to crawl monitoring and indexing validation \u2014 you can execute migrations confidently while preserving organic visibility.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">A well-planned migration not only protects rankings but can also improve site architecture, crawl efficiency, and long-term SEO performance.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Need_Help_With_Website_Migration\"><\/span>Need Help With Website Migration?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Large-scale migrations require technical precision and SEO expertise. If you\u2019re planning a redesign, domain change, or CMS migration, our team can ensure a smooth transition without traffic loss <a href=\"https:\/\/www.copebusiness.com\/contact\/\">Contact Cope Business<\/a>.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Migrating a large website is one of the most complex processes in technical SEO. Whether you&rsquo;re changing domains, redesigning your [&hellip;]<\/p>\n","protected":false},"author":2,"featured_media":16718,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"set","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":"","jetpack_publicize_message":"","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":true,"jetpack_social_options":{"image_generator_settings":{"template":"highway","default_image_id":0,"font":"","enabled":false},"version":2}},"categories":[1],"tags":[],"class_list":["post-16713","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-technical-seo"],"jetpack_publicize_connections":[],"_links":{"self":[{"href":"https:\/\/www.copebusiness.com\/fr\/wp-json\/wp\/v2\/posts\/16713","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.copebusiness.com\/fr\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.copebusiness.com\/fr\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.copebusiness.com\/fr\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.copebusiness.com\/fr\/wp-json\/wp\/v2\/comments?post=16713"}],"version-history":[{"count":1,"href":"https:\/\/www.copebusiness.com\/fr\/wp-json\/wp\/v2\/posts\/16713\/revisions"}],"predecessor-version":[{"id":16716,"href":"https:\/\/www.copebusiness.com\/fr\/wp-json\/wp\/v2\/posts\/16713\/revisions\/16716"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.copebusiness.com\/fr\/wp-json\/wp\/v2\/media\/16718"}],"wp:attachment":[{"href":"https:\/\/www.copebusiness.com\/fr\/wp-json\/wp\/v2\/media?parent=16713"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.copebusiness.com\/fr\/wp-json\/wp\/v2\/categories?post=16713"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.copebusiness.com\/fr\/wp-json\/wp\/v2\/tags?post=16713"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}