diff --git a/Userland/Utilities/gzip.cpp b/Userland/Utilities/gzip.cpp
index 7de3827470..a4b3ebdb3d 100644
--- a/Userland/Utilities/gzip.cpp
+++ b/Userland/Utilities/gzip.cpp
@@ -15,18 +15,29 @@ int main(int argc, char** argv)
     Vector<String> filenames;
     bool keep_input_files { false };
     bool write_to_stdout { false };
+    bool decompress { false };
 
     Core::ArgsParser args_parser;
     args_parser.add_option(keep_input_files, "Keep (don't delete) input files", "keep", 'k');
     args_parser.add_option(write_to_stdout, "Write to stdout, keep original files unchanged", "stdout", 'c');
-    args_parser.add_positional_argument(filenames, "File to compress", "FILE");
+    args_parser.add_option(decompress, "Decompress", "decompress", 'd');
+    args_parser.add_positional_argument(filenames, "Files", "FILES");
     args_parser.parse(argc, argv);
 
     if (write_to_stdout)
         keep_input_files = true;
 
     for (auto const& input_filename : filenames) {
-        auto output_filename = String::formatted("{}.gz", input_filename);
+        String output_filename;
+        if (decompress) {
+            if (!input_filename.ends_with(".gz"sv)) {
+                warnln("unknown suffix for: {}, skipping", input_filename);
+                continue;
+            }
+            output_filename = input_filename.substring(0, input_filename.length() - ".gz"sv.length());
+        } else {
+            output_filename = String::formatted("{}.gz", input_filename);
+        }
 
         // We map the whole file instead of streaming to reduce size overhead (gzip header) and increase the deflate block size (better compression)
         // TODO: automatically fallback to buffered streaming for very large files
@@ -37,26 +48,32 @@ int main(int argc, char** argv)
         }
         auto file = file_or_error.value();
 
-        auto compressed_file = Compress::GzipCompressor::compress_all(file->bytes());
-        if (!compressed_file.has_value()) {
-            warnln("Failed gzip compressing input file");
+        AK::Optional<ByteBuffer> output_bytes;
+        if (decompress) {
+            output_bytes = Compress::GzipDecompressor::decompress_all(file->bytes());
+        } else {
+            output_bytes = Compress::GzipCompressor::compress_all(file->bytes());
+        }
+
+        if (!output_bytes.has_value()) {
+            warnln("Failed gzip {} input file", decompress ? "decompressing"sv : "compressing"sv);
             return 1;
         }
 
         auto success = false;
         if (write_to_stdout) {
             auto stdout = Core::OutputFileStream { Core::File::standard_output() };
-            success = stdout.write_or_error(compressed_file.value());
+            success = stdout.write_or_error(output_bytes.value());
         } else {
             auto output_stream_result = Core::OutputFileStream::open(output_filename);
             if (output_stream_result.is_error()) {
                 warnln("Failed opening output file for writing: {}", output_stream_result.error());
                 return 1;
             }
-            success = output_stream_result.value().write_or_error(compressed_file.value());
+            success = output_stream_result.value().write_or_error(output_bytes.value());
         }
         if (!success) {
-            warnln("Failed writing compressed file to output");
+            warnln("Failed writing to output");
             return 1;
         }