Universal Gcode Sender

A free and full featured gcode platform used for interfacing with advanced CNC controllers like GRBL , TinyG, g2core and Smoothieware. Universal Gcode Sender is a self-contained Java application which includes all external dependencies and can be used on most computers running Windows, MacOSX or Linux.

Language License Build Status GitHub Release Date


  • Cross platform, can run on Windows, MacOSX, Linux, and Raspberry Pi.
  • 3D Gcode Visualizer with color coded line segments and real time tool position feedback.
  • Duration estimates.
  • Support for Gamepads and Joysticks
  • Web pendant interface
  • Possible to connect a Gamepad
  • Tool for drawing and generate gcode
  • Over 3000 lines of unit test code, and another 1000 lines of comments documenting the tests.
  • Configuratble gcode optimization:
    • Remove comments
    • Truncate decimal precision to configurable amount
    • Convert arcs (G2/G3) to line segments
    • Remove whitespace


Fully modular GUI, reconfigure windows to suite your needs. Screenshot

Built in gcode editor with line highlighter.

Gcode editor

Customizable keybindings.

Key bindings

Zoom to selection with command and drag.


Right click in the visualizer to jog to a specific XY location.

Click to jog


Bob's CNC



Universal Gcode Sender is free software developed and maintained in my free time for the hobby cnc community. If you would like to make a monetary donation, all proceeds will be used to try convincing my wife that it is worth my time.

$1 $5 $10
$25 Custom amount