How to Use the Scripting Console in After Effects

This article explains what a scripting console is within Adobe After Effects and outlines the most effective methods for executing ExtendScript commands. You will learn how the console environment functions as an interactive evaluation tool, the primary software tools used to write and test code, and step-by-step instructions for running commands to automate your motion graphics workflows.

What Is the Scripting Console?

In Adobe After Effects, a scripting console is an interactive execution environment that enables developers and technical animators to evaluate ExtendScript code in real time. ExtendScript is Adobe’s extended version of JavaScript (ECMAScript 3 standard) designed to control application features, automate repetitive tasks, and manipulate composition elements.

While After Effects does not have an open command-line console natively integrated into its default UI, scripting consoles exist through external debuggers, dedicated ScriptUI panels, or development environments. A scripting console functions as a Read-Eval-Print Loop (REPL), allowing you to send single-line commands or entire blocks of code directly to the active After Effects application to see the immediate result without having to save and run a full .jsx script file each time.

Primary Tools for Console Execution

1. Visual Studio Code with ExtendScript Debugger

Visual Studio Code (VS Code) paired with the official "ExtendScript Debugger" extension is Adobe’s current standard tool for executing and debugging ExtendScript.

  • Console Feature: The Debug Console in VS Code acts as a direct REPL interface with After Effects when a debug session is active.
  • Execution: Once attached to After Effects, typing code into the Debug Console runs it directly in the host application.

2. Adobe ExtendScript Toolkit (ESTK)

Although legacy and discontinued for 64-bit-only operating systems, ESTK includes a native JavaScript Console panel.

  • Console Feature: Selecting "Adobe After Effects" in the target application drop-down links the console directly to the program.
  • Execution: Entering any command into the bottom bar of the JavaScript Console executes it instantly within the active AE session.

3. In-App Scripting Consoles (ScriptUI Panels)

Many artists and developers install third-party or custom dockable ScriptUI panels inside After Effects (such as pt_Console or open-source console scripts). These tools add an input box inside the After Effects workspace where you can type an ExtendScript command and execute it with the press of an Enter key.

How to Execute ExtendScript Commands

Method 1: Using the VS Code Debug Console

  1. Open Visual Studio Code and install the ExtendScript Debugger extension from the marketplace.
  2. Launch Adobe After Effects.
  3. In VS Code, open a .jsx file or an empty folder.
  4. Press F5 or go to Run > Start Debugging, and select ExtendScript Debug as the environment.
  5. In the target dropdown at the top, select your running version of After Effects.
  6. Open the Debug Console tab (Ctrl+Shift+Y on Windows, Cmd+Shift+Y on macOS).
  7. Type your ExtendScript command (for example: app.project.activeItem.name;) and press Enter to view the output.

Method 2: Running Commands via the File Menu

If you do not need interactive line-by-line REPL testing, you can execute commands saved to a script file directly inside After Effects:

  1. Open a text editor and write your ExtendScript commands.
  2. Save the file with the .jsx extension.
  3. In After Effects, navigate to File > Scripts > Run Script File...
  4. Locate your .jsx file and click Open to immediately execute the commands.

Method 3: Executing via the Operating System Command Line

ExtendScript commands can be sent directly to After Effects using terminal commands without opening the code editor.

  • On Windows (Command Prompt):

    afterfx.exe -r "app.newProject(); alert('Project Created!');"

  • On macOS (Terminal):

    /Applications/Adobe\ After\ Effects\ <version>/Adobe\ After\ Effects\ <version>.app/Contents/MacOS/After\ Effects -r "app.newProject(); alert('Project Created!');"

    The -r flag instructs After Effects to run the string of code passed immediately after it.

Common Useful Commands for Quick Console Testing

  • Check the active composition name:

    app.project.activeItem.name;

  • Add a new solid layer to the active composition:

    app.project.activeItem.layers.addSolid([1, 0, 0], "Red Solid", 1920, 1080, 1.0);

  • Deselect all selected layers:

    var sel = app.project.activeItem.selectedLayers;
for (var i = 0; i < sel.length; i++) { sel[i].selected = false; }