diff --git a/bin/dev b/bin/dev
index 82b0d9d..fc9ca41 100755
--- a/bin/dev
+++ b/bin/dev
@@ -138,6 +138,30 @@ class DevHelper:
         qrenderdoc = self._find_qrenderdoc()
         self._exec_in_root(qrenderdoc, replace=True)
 
+    ##
+    # Builds the Tracy profiler (viewer) from the third_party/tracy submodule,
+    # then runs it. Building from the submodule keeps the viewer's version in
+    # sync with the client compiled into the engine.
+    #   dev tracy [--fresh] [args...]
+    # Configures only when there is no build yet (or --fresh), then builds
+    # incrementally. Other arguments are passed through to the profiler.
+    def tracy(self, *args, **kwargs):
+        fresh = "--fresh" in args
+        args = [arg for arg in args if arg != "--fresh"]
+
+        source_dir = os.path.join("third_party", "tracy", "profiler")
+        build_dir = os.path.join(source_dir, "build")
+        if fresh or not os.path.isfile(os.path.join(self._project_root(), build_dir, "CMakeCache.txt")):
+            configure = ["cmake", "-B", build_dir, "-S", source_dir, "-DCMAKE_BUILD_TYPE=Release"]
+            if fresh:
+                configure.append("--fresh")
+            self._run_in_root(configure)
+        self._run_in_root(["cmake", "--build", build_dir, "--parallel"])
+
+        binary = os.path.join(self._project_root(), build_dir, "tracy-profiler")
+        print(f"Running: {shlex.join([binary, *args])}")
+        os.execv(binary, [binary, *args])
+
     def shaders(self, *args, **kwargs):
         shaders_dir = os.path.join(self._project_root(), "engine", "src", "shaders")
         if not os.path.isdir(shaders_dir):