diff --git a/scripts/seo-audit.mjs b/scripts/seo-audit.mjs
index 68ab7212..ebcab8fa 100644
--- a/scripts/seo-audit.mjs
+++ b/scripts/seo-audit.mjs
@@ -7,12 +7,17 @@ const __dirname = path.dirname(__filename);
 
 const DIST_DIR = path.resolve(__dirname, '../dist');
 const LOCALES_DIR = path.resolve(__dirname, '../public/locales');
-const SITE_URL = (process.env.SITE_URL || 'https://www.bentopdf.com').replace(
+// The blog is BentoPDF's own content, so generate-blog.mjs and the hand-written
+// blog pages keep their canonicals on the official site, also in self-hosted
+// builds with a custom SITE_URL or BASE_URL.
+const OFFICIAL_SITE_URL = 'https://www.bentopdf.com';
+const SITE_URL = (process.env.SITE_URL || OFFICIAL_SITE_URL).replace(
   /\/+$/,
   ''
 );
 const BASE_PATH = (process.env.BASE_URL || '/').replace(/\/$/, '');
 const HOST = new URL(SITE_URL).hostname;
+const OFFICIAL_HOST = new URL(OFFICIAL_SITE_URL).hostname;
 
 const NOINDEX_ALLOWLIST = new Set(['404.html', 'wasm-settings.html']);
 const SKIP_DIRS = new Set([
@@ -90,18 +95,23 @@ function hasTrailingSlash(href) {
   return pathname !== '/' && pathname.endsWith('/');
 }
 
+function isBlogPage(rel) {
+  return rel.startsWith('blog/');
+}
+
 function expectedCanonicalForFile(rel) {
   const parts = rel.split('/');
   const fileName = parts.pop();
   const baseName = fileName.replace(/\.html$/, '');
   const slug = baseName === 'index' ? '' : baseName;
+  if (isBlogPage(rel)) {
+    return `${OFFICIAL_SITE_URL}/blog${slug ? `/${slug}` : ''}`;
+  }
   const translationKey = KEY_MAPPING[baseName] || toCamelCase(baseName);
   const segments = [SITE_URL];
   if (BASE_PATH) segments.push(BASE_PATH.replace(/^\//, ''));
   for (const dir of parts) {
-    if (dir === 'blog') {
-      segments.push(dir);
-    } else if (LOCALE_DIRS.has(dir)) {
+    if (LOCALE_DIRS.has(dir)) {
       const translated =
         baseName === 'index' ||
         Boolean(toolsByLang[dir] && toolsByLang[dir][translationKey]);
@@ -177,10 +187,11 @@ function auditHtml(file, knownSlugs) {
           `${file.rel}: canonical "${actual}" ends with "/" (the server redirects it to the slashless form)`
         );
       }
-      if (url.hostname !== HOST) {
+      const expectedHost = isBlogPage(file.rel) ? OFFICIAL_HOST : HOST;
+      if (url.hostname !== expectedHost) {
         warn(
           'canonical',
-          `${file.rel}: canonical host "${url.hostname}" != expected "${HOST}"`
+          `${file.rel}: canonical host "${url.hostname}" != expected "${expectedHost}"`
         );
       }
     } catch {