diff --git a/sway/window-transparency.py b/sway/window-transparency.py
new file mode 100755
index 0000000..dd97c44
--- /dev/null
+++ b/sway/window-transparency.py
@@ -0,0 +1,106 @@
+#!/usr/bin/python
+
+# This script requires i3ipc-python package (install it from a system package manager
+# or pip).
+# It makes inactive windows transparent. Use `transparency_val` variable to control
+# transparency strength in range of 0…1 or use the command line argument -o.
+
+import argparse
+import i3ipc
+import signal
+import sys
+import os
+from pathlib import Path
+from functools import partial
+
+def on_window_focus(opacity, ipc, event):
+    if os.path.exists(flag):
+        return
+    global prev_focused
+    global prev_workspace
+
+    focused_workspace = ipc.get_tree().find_focused()
+
+    if focused_workspace == None:
+        return
+
+    focused = event.container
+    workspace = focused_workspace.workspace().num
+
+    if focused.id != prev_focused.id:  # https://github.com/swaywm/sway/issues/2859
+        focused.command("opacity 1")
+        if workspace == prev_workspace:
+            prev_focused.command("opacity " + opacity)
+        prev_focused = focused
+        prev_workspace = workspace
+
+def show_hide(ipc, opacity):
+    global flag
+    if os.path.exists(flag):
+        os.remove(flag)
+    else:
+        opacity = 0
+        Path(flag).touch()
+    for workspace in ipc.get_tree().workspaces():
+        for w in workspace:
+            if w.focused and opacity != 0:
+                w.command("opacity 1")
+            else:
+                w.command("opacity "+str(opacity))
+
+def remove_opacity(ipc):
+    global pid
+    global flag
+    for workspace in ipc.get_tree().workspaces():
+        for w in workspace:
+            w.command("opacity 1")
+    for file in [pid, flag]:
+        if os.path.exists(file):
+            os.remove(file)
+    ipc.main_quit()
+    sys.exit(0)
+
+def set_all(ipc,opacity):
+    for window in ipc.get_tree():
+        window.command("opacity " + opacity)
+
+flag = os.environ["HOME"]+"/.spool/sway-hidden"
+pid = os.environ["HOME"]+"/.spool/sway-transparency"
+opacity = "0.8"
+
+if __name__ == "__main__":
+    f = open(pid, "w")
+    try:
+        f.write(str(os.getpid()))
+    except AssertionError as error:
+        print("Failed to write PID to file "+pid+": "+error)
+        sys.exit(0)
+    f.close()
+
+    parser = argparse.ArgumentParser(
+        description="This script allows you to set the transparency of unfocused windows in sway."
+    )
+    parser.add_argument(
+        "--opacity",
+        "-o",
+        type=str,
+        default=opacity,
+        help="set opacity value in range 0...1",
+    )
+    args = parser.parse_args()
+
+    ipc = i3ipc.Connection()
+    prev_focused = None
+    prev_workspace = ipc.get_tree().find_focused().workspace().num
+
+    for window in ipc.get_tree():
+        if window.focused:
+            prev_focused = window
+        else:
+            window.command("opacity " + args.opacity)
+    for sig in [signal.SIGINT, signal.SIGTERM]:
+        signal.signal(sig, lambda signal, frame: remove_opacity(ipc))
+    signal.signal(signal.SIGUSR1, lambda signal, frame: show_hide(ipc, opacity))
+    ipc.on("window::focus", partial(on_window_focus, args.opacity))
+    ipc.main()
+