diff --git a/options/locale_next/locale_en-US.json b/options/locale_next/locale_en-US.json
index b1c98e4551..a551db87dc 100644
--- a/options/locale_next/locale_en-US.json
+++ b/options/locale_next/locale_en-US.json
@@ -102,5 +102,6 @@
     "admin.dashboard.cleanup_offline_runners": "Cleanup offline runners",
     "settings.visibility.description": "Profile visibility affects others' ability to access your non-private repositories. <a href=\"%s\" target=\"_blank\">Learn more</a>",
     "avatar.constraints_hint": "Custom avatar may not exceed %[1]s in size or be larger than %[2]dx%[3]d pixels",
+    "og.repo.summary_card.alt_description": "Summary card of repository %[1]s, described as: %[2]s",
     "meta.last_line": "Thank you for translating Forgejo! This line isn't seen by the users but it serves other purposes in the translation management. You can place a fun fact in the translation instead of translating it."
 }
diff --git a/services/context/repo.go b/services/context/repo.go
index cce3a5fa70..c8876d7166 100644
--- a/services/context/repo.go
+++ b/services/context/repo.go
@@ -644,7 +644,11 @@ func RepoAssignment(ctx *Context) context.CancelFunc {
 	ctx.Data["OpenGraphImageURL"] = repo.SummaryCardURL()
 	ctx.Data["OpenGraphImageWidth"] = cardWidth
 	ctx.Data["OpenGraphImageHeight"] = cardHeight
-	ctx.Data["OpenGraphImageAltText"] = ctx.Tr("repo.summary_card_alt", repo.FullName())
+	if util.IsEmptyString(repo.Description) {
+		ctx.Data["OpenGraphImageAltText"] = ctx.Tr("repo.summary_card_alt", repo.FullName())
+	} else {
+		ctx.Data["OpenGraphImageAltText"] = ctx.Tr("og.repo.summary_card.alt_description", repo.FullName(), repo.Description)
+	}
 
 	if repo.IsFork {
 		RetrieveBaseRepo(ctx, repo)
diff --git a/tests/integration/opengraph_test.go b/tests/integration/opengraph_test.go
index 56fbedd351..aa6d8daf5c 100644
--- a/tests/integration/opengraph_test.go
+++ b/tests/integration/opengraph_test.go
@@ -98,7 +98,7 @@ func TestOpenGraphProperties(t *testing.T) {
 				"og:url":          setting.AppURL + "/user27/repo49/src/branch/master/test/test.txt",
 				"og:type":         "object",
 				"og:image":        setting.AppURL + "user27/repo49/-/summary-card",
-				"og:image:alt":    "Summary card of repository user27/repo49",
+				"og:image:alt":    "Summary card of repository user27/repo49, described as: A wonderful repository with more than just a README.md",
 				"og:image:width":  "1200",
 				"og:image:height": "600",
 				"og:site_name":    siteName,
@@ -141,7 +141,7 @@ func TestOpenGraphProperties(t *testing.T) {
 				"og:description":  "A wonderful repository with more than just a README.md",
 				"og:type":         "object",
 				"og:image":        setting.AppURL + "user27/repo49/-/summary-card",
-				"og:image:alt":    "Summary card of repository user27/repo49",
+				"og:image:alt":    "Summary card of repository user27/repo49, described as: A wonderful repository with more than just a README.md",
 				"og:image:width":  "1200",
 				"og:image:height": "600",
 				"og:site_name":    siteName,