diff --git a/qmk b/qmk
index 5c5cf44..bc44888 100755
--- a/qmk
+++ b/qmk
@@ -22,17 +22,14 @@ _KEYBOARDS = {
 }
 
 
-def abs_path(*paths):
-    dirname = os.path.abspath(os.path.dirname(__file__))
-    return os.path.join(dirname, *paths)
+def qmk(cmd, targets):
+    for target in targets:
+        subprocess.check_call(["qmk", cmd, "-kb", target])
 
 
-def qmk(cmd, keyboard):
-    subprocess.check_call(["qmk", cmd, "-kb", keyboard])
-
-
-def show(keyboard, render):
-    render(abs_path("users/mnye"), abs_path("keyboards", keyboard, "keymaps/mnye"))
+def show(render, targets):
+    for target in targets:
+        render(target)
 
 
 def main():
@@ -42,15 +39,19 @@ def main():
     args = parser.parse_args()
 
     command = _COMMANDS.get(args.command, args.command)
-    keyboard = _KEYBOARDS.get(args.keyboard, args.keyboard)
+
+    if args.keyboard == "all":
+        targets = _KEYBOARDS.values()
+    else:
+        targets = [_KEYBOARDS.get(args.keyboard, args.keyboard)]
 
     try:
         if command == "show":
-            show(keyboard, visualizer.render_ascii)
+            show(visualizer.render_ascii, targets)
         elif command == "svg":
-            show(keyboard, visualizer.render_svg)
+            show(visualizer.render_svg, targets)
         else:
-            qmk(command, keyboard)
+            qmk(command, targets)
     except subprocess.CalledProcessError:
         return 1
     except KeyboardInterrupt:
diff --git a/visualizer/__init__.py b/visualizer/__init__.py
index ab95a08..c11b880 100644
--- a/visualizer/__init__.py
+++ b/visualizer/__init__.py
@@ -7,18 +7,29 @@
 from .svg import SvgLayout
 
 
-def render_ascii(user_dir, keyboard_dir):
+def abs_path(*paths):
+    dirname = os.path.abspath(os.path.dirname(os.path.dirname(__file__)))
+    return os.path.join(dirname, *paths)
+
+
+def render_ascii(keyboard):
+    user_dir = abs_path("users/mnye")
+    keyboard_dir = abs_path("keyboards", keyboard, "keymaps/mnye")
     keymap = KeyMap.load(user_dir, keyboard_dir)
     AsciiTemplate.load(keyboard_dir).render(keymap)
 
 
-def render_svg(user_dir, keyboard_dir):
+def render_svg(keyboard):
+    user_dir = abs_path("users/mnye")
+    keyboard_dir = abs_path("keyboards", keyboard, "keymaps/mnye")
     keymap = KeyMap.load(user_dir, keyboard_dir)
-    output_file = SvgLayout.load(keyboard_dir).render(keymap)
+
+    output_file = abs_path(keyboard.replace("/", "_") + "_mnye.svg")
+    SvgLayout.load(keyboard_dir).render(keymap, output_file)
     print("Wrote svg:", os.path.relpath(output_file))
-    _open_file(output_file)
+    _maybe_open_file(output_file)
 
 
-def _open_file(f):
+def _maybe_open_file(f):
     if sys.platform == "darwin":
         subprocess.run(["open", f], check=True)
diff --git a/visualizer/svg.py b/visualizer/svg.py
index bc51e99..3fe2a8e 100644
--- a/visualizer/svg.py
+++ b/visualizer/svg.py
@@ -50,18 +50,16 @@
 class SvgLayout(object):
     @classmethod
     def load(cls, keyboard_dir):
-        output_file = os.path.join(keyboard_dir, "keymap.svg")
         with open(os.path.join(keyboard_dir, "svg_layout.json")) as f:
             keys = []
             for key in json.load(f):
                 keys.append(_Key(**key))
-            return cls(keys, output_file)
+            return cls(keys)
 
-    def __init__(self, keys, output_file):
+    def __init__(self, keys):
         self.keys = keys
-        self.output_file = output_file
 
-    def render(self, keymap):
+    def render(self, keymap, output_file):
         # Attach keymap to keys.
         for layer in keymap.layers:
             for key, code in zip(self.keys, layer.key_codes()):
@@ -101,11 +99,10 @@ def render(self, keymap):
             _Combo(self.keys[i1], self.keys[i2], combo.code).render(svg)
 
         # Write out rendered svg.
-        with open(self.output_file, "wb") as f:
+        with open(output_file, "wb") as f:
             tree = ElementTree.ElementTree(svg)
             ElementTree.indent(tree)
             tree.write(f)
-        return self.output_file
 
 
 class _Key(object):