diff --git a/Userland/Libraries/LibArchive/TarStream.h b/Userland/Libraries/LibArchive/TarStream.h
index d0764faa4d8..5ffa04991ed 100644
--- a/Userland/Libraries/LibArchive/TarStream.h
+++ b/Userland/Libraries/LibArchive/TarStream.h
@@ -40,6 +40,9 @@ public:
     const TarFileHeader& header() const { return m_header; }
     TarFileStream file_contents();
 
+    template<VoidFunction<StringView, StringView> F>
+    ErrorOr<void> for_each_extended_header(F func);
+
 private:
     TarFileHeader m_header;
     InputStream& m_stream;
@@ -64,4 +67,51 @@ private:
     friend class TarFileStream;
 };
 
+template<VoidFunction<StringView, StringView> F>
+inline ErrorOr<void> TarInputStream::for_each_extended_header(F func)
+{
+    VERIFY(header().content_is_like_extended_header());
+
+    Archive::TarFileStream file_stream = file_contents();
+
+    ByteBuffer file_contents_buffer = TRY(ByteBuffer::create_zeroed(header().size()));
+    VERIFY(file_stream.read(file_contents_buffer) == header().size());
+
+    StringView file_contents { file_contents_buffer };
+
+    while (!file_contents.is_empty()) {
+        // Split off the length (until the first space).
+        Optional<size_t> length_end_index = file_contents.find(' ');
+        if (!length_end_index.has_value())
+            return Error::from_string_literal("Malformed extended header: No length found.");
+        Optional<unsigned int> length = file_contents.substring_view(0, length_end_index.value()).to_uint();
+        if (!length.has_value())
+            return Error::from_string_literal("Malformed extended header: Could not parse length.");
+        unsigned int remaining_length = length.value();
+
+        remaining_length -= length_end_index.value() + 1;
+        file_contents = file_contents.substring_view(length_end_index.value() + 1);
+
+        // Extract the header.
+        StringView header = file_contents.substring_view(0, remaining_length - 1);
+        file_contents = file_contents.substring_view(remaining_length - 1);
+
+        // Ensure that the header ends at the expected location.
+        if (file_contents.length() < 1 || !file_contents.starts_with('\n'))
+            return Error::from_string_literal("Malformed extended header: Header does not end at expected location.");
+        file_contents = file_contents.substring_view(1);
+
+        // Find the delimiting '='.
+        Optional<size_t> header_delimiter_index = header.find('=');
+        if (!header_delimiter_index.has_value())
+            return Error::from_string_literal("Malformed extended header: Header does not have a delimiter.");
+        StringView key = header.substring_view(0, header_delimiter_index.value());
+        StringView value = header.substring_view(header_delimiter_index.value() + 1);
+
+        func(key, value);
+    }
+
+    return {};
+}
+
 }