diff --git a/Userland/Libraries/LibWeb/MimeSniff/MimeType.cpp b/Userland/Libraries/LibWeb/MimeSniff/MimeType.cpp
index 4157960161..5ac43eab40 100644
--- a/Userland/Libraries/LibWeb/MimeSniff/MimeType.cpp
+++ b/Userland/Libraries/LibWeb/MimeSniff/MimeType.cpp
@@ -284,6 +284,16 @@ bool MimeType::is_zip_based() const
     return subtype().ends_with_bytes("+zip"sv) || essence().is_one_of("application/zip"sv);
 }
 
+// https://mimesniff.spec.whatwg.org/#archive-mime-type
+bool MimeType::is_archive() const
+{
+    // An archive MIME type is any MIME type whose essence is one of the following:
+    //    - application/x-rar-compressed
+    //    - application/zip
+    //    - application/x-gzip
+    return essence().is_one_of("application/x-rar-compressed"sv, "application/zip"sv, "application/x-gzip"sv);
+}
+
 // https://mimesniff.spec.whatwg.org/#xml-mime-type
 bool MimeType::is_xml() const
 {
diff --git a/Userland/Libraries/LibWeb/MimeSniff/MimeType.h b/Userland/Libraries/LibWeb/MimeSniff/MimeType.h
index c5fecf1243..8d22153110 100644
--- a/Userland/Libraries/LibWeb/MimeSniff/MimeType.h
+++ b/Userland/Libraries/LibWeb/MimeSniff/MimeType.h
@@ -30,6 +30,7 @@ public:
     bool is_audio_or_video() const;
     bool is_font() const;
     bool is_zip_based() const;
+    bool is_archive() const;
     bool is_xml() const;
     bool is_html() const;
     bool is_javascript() const;