diff --git a/src/xenia/gpu/gl4/gl4_trace_viewer_main.cc b/src/xenia/gpu/gl4/gl4_trace_viewer_main.cc
index 48a108be6..70db61b9a 100644
--- a/src/xenia/gpu/gl4/gl4_trace_viewer_main.cc
+++ b/src/xenia/gpu/gl4/gl4_trace_viewer_main.cc
@@ -19,6 +19,7 @@
 #include "xenia/gpu/gl4/gl4_command_processor.h"
 #include "xenia/gpu/gl4/gl4_graphics_system.h"
 #include "xenia/gpu/gl4/gl4_shader.h"
+#include "xenia/ui/file_picker.h"
 
 DEFINE_string(target_trace_file, "", "Specifies the trace file to load.");
 
@@ -69,21 +70,40 @@ class GL4TraceViewer : public TraceViewer {
 
 int trace_viewer_main(const std::vector<std::wstring>& args) {
   // Grab path from the flag or unnamed argument.
-  if (FLAGS_target_trace_file.empty() && args.size() < 2) {
-    xe::FatalError("No trace file specified");
-    return 1;
-  }
-
   std::wstring path;
   if (!FLAGS_target_trace_file.empty()) {
     // Passed as a named argument.
     // TODO(benvanik): find something better than gflags that supports
     // unicode.
     path = xe::to_wstring(FLAGS_target_trace_file);
-  } else {
+  } else if (args.size() >= 2) {
     // Passed as an unnamed argument.
     path = args[1];
   }
+
+  // If no path passed, ask the user.
+  if (path.empty()) {
+    auto file_picker = xe::ui::FilePicker::Create();
+    file_picker->set_mode(ui::FilePicker::Mode::kOpen);
+    file_picker->set_type(ui::FilePicker::Type::kFile);
+    file_picker->set_multi_selection(false);
+    file_picker->set_title(L"Select Trace File");
+    file_picker->set_extensions({
+        {L"Supported Files", L"*.*"}, {L"All Files (*.*)", L"*.*"},
+    });
+    if (file_picker->Show()) {
+      auto selected_files = file_picker->selected_files();
+      if (!selected_files.empty()) {
+        path = selected_files[0];
+      }
+    }
+  }
+
+  if (path.empty()) {
+    xe::FatalError("No trace file specified");
+    return 1;
+  }
+
   // Normalize the path and make absolute.
   auto abs_path = xe::to_absolute_path(path);