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CNCjs vs Mach4

Professional comparison and analysis to help you choose the right software solution for your needs.

CNCjs icon
CNCjs
Mach4 icon
Mach4

CNCjs vs Mach4: The Verdict

Last updated: May 2026 · Comparison by Sugggest Editorial Team

Feature CNCjs Mach4
Sugggest Score
Category Development Development
Pricing Open Source

Product Overview

CNCjs
CNCjs

Description: CNCjs is an open-source web-based CNC control software that allows you to control CNC machines from a web browser. It can send G-code commands to CNC machines like 3D printers, laser cutters, CNC routers, and milling machines.

Type: software

Pricing: Open Source

Mach4
Mach4

Description: Mach4 is a popular CNC control software for DIY and hobbyist CNC machines. It works with many CNC motion control boards and can control up to 6 axes. Mach4 has an easy-to-use interface and includes features like G-code sender and conversational programming.

Type: software

Key Features Comparison

CNCjs
CNCjs Features
  • Web-based interface accessible from any device with a browser
  • G-code sender to control CNC machines
  • Visualizer to simulate G-code before running it
  • Supports GRBL and Smoothie compatible CNC controllers
  • Plugin architecture to add custom features and behaviors
  • Responsive UI with mobile support
  • Auto-leveling and mesh bed leveling
  • Jog controls and workspace zeroing
  • G-code file management
  • Macro support
Mach4
Mach4 Features
  • Supports up to 6 axes of motion control
  • Works with many CNC motion control boards
  • Easy-to-use interface
  • G-code sender
  • Conversational programming
  • Custom screen layouts
  • Remote control and monitoring
  • Macro programming
  • Integrated tool library

Pros & Cons Analysis

CNCjs
CNCjs
Pros
  • Free and open source
  • Easy to set up and use
  • Cross-platform - works on Windows, Mac, Linux
  • Active development community
  • Allows controlling CNC machines remotely
  • Visualizer helps preview G-code before running
  • Extendable and customizable via plugins
Cons
  • Limited documentation and support resources
  • Some advanced features may require plugins
  • May not support every CNC controller
  • Web-based interface has some limitations compared to desktop apps
Mach4
Mach4
Pros
  • Comprehensive CNC control features
  • Compatibility with various motion control boards
  • User-friendly interface
  • Extensive customization options
  • Remote control and monitoring capabilities
Cons
  • Steep learning curve for beginners
  • Limited built-in post-processing capabilities
  • Potential compatibility issues with some motion control boards

Pricing Comparison

CNCjs
CNCjs
  • Open Source
Mach4
Mach4
  • Not listed

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