OnTopReplica is a lightweight, open-source Windows utility that creates a real-time, click-through clone of any open window and pins it “always on top”. It functions much like a customizable picture-in-picture (PiP) window for your desktop. Key Features
Window Cloning: Duplicates any running program, video player, or web page in real-time.
Region Selection: Allows you to isolate and clone only a specific part of a window (e.g., just the video feed or just the chat box).
Click-Through Mode: Makes the clone transparent to mouse clicks, allowing you to interact with the applications underneath without accidentally clicking the replica.
Click-Forwarding: Lets you send mouse clicks directly through the replica window to the original app.
Customizable Appearance: You can adjust the size, zoom level, and opacity (transparency). How the Portable / “No Install” Version Works
OnTopReplica itself relies on standard Windows .msi installers. However, because it is essentially a lightweight standalone application that doesn’t embed deeply into the Windows Registry, you can easily use it as a portable tool:
Download the tool from the official OnTopReplica GitHub Releases. Extract the files from the downloaded zip package.
Simply launch the .exe file; it will run directly without needing administrator privileges or going through a formal installation wizard. How to Use It
Launch OnTopReplica. A blank, floating window will appear with the message “Right Click Here to Start.”
Right-click the window and go to Select Window, then choose the app or video you want to clone from the active list.
Optionally, choose Select Region to crop the view to the exact segment you need. Move and resize the floating box anywhere on your screen. Important Tips
Keep the original window open: The source window must remain open for the clone to update. If you minimize the original app, the replica will freeze.
Watch for browser tabs: If you are cloning a browser, the replica will capture a specific coordinate on the screen; changing tabs or scrolling will change what is displayed in the replica.
If you’d like to test it out, you can get the program files directly from the OnTopReplica GitHub Repository.
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