iScribby is a free-to-download productivity app developed by QuickzDev. It is a simple software that lets you draw directly on your screen over any open window or app. This utility tool supports convenient keyboard shortcuts for quick access and includes undo/redo options.

Draw, highlight, and sketch anywhere

iScribby is a lightweight screen annotation tool that lets you scribble, sketch, or highlight on your display while browsing the web, working on documents, or playing games. This app is designed to run unobtrusively in the background, activating a drawing mode with a keyboard shortcut and exiting when you’re done.

Another notable feature is the ability to choose whether your drawing remains visible outside of draw mode, along with a search field in the shortcuts window that lets you quickly find shortcuts. However, it requires Windows 10 or a later version to install and function properly.

Requires Windows 10 or later

iScribby is a lightweight, free screen annotation tool for Windows 10 or later. It allows users draw, highlight, or scribble over any app using keyboard shortcuts, with undo/redo support and optional persistent drawings. Running unobtrusively in the background, it provides quick and flexible on-screen annotation without interrupting workflow.