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cncjs

> 编程语言
Open source

A web-based interface for CNC milling controller running Grbl, Marlin, Smoothieware, or TinyG.

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A web-based interface for CNC milling controller running Grbl, Marlin, Smoothieware, or TinyG.

CNCjs

CNCjs is a full-featured web-based interface for CNC controllers running Grbl, Marlin, Smoothieware, or TinyG.

For a more complete introduction, see the Introduction section of the wiki page.

Features

  • Supported controllers
    • Grbl (Download)
    • Grbl-Mega (Download)
    • Marlin (Download)
    • Smoothieware (Download)
    • TinyG (Recommend: firmware version 0.97 build 449.xx) (Download)
    • g2core
  • Desktop App for Linux, Mac OS X, and Windows
  • 6-axis digital readout (DRO)
  • Tool path 3D visualization
  • Simultaneously communicate with multiple clients
  • Responsive view for small screen display with device width less than 720px
    • Safari on an iPhone 5S [1] [2]
  • Customizable workspace
  • Custom widget (since 1.9.10)
  • Custom MDI (Multiple Document Interface) command buttons (since 1.9.13)
  • My Account
  • Commands
  • Events
  • Keyboard Shortcuts
  • Contour ShuttleXpress
  • Multi-Language Support
  • Watch Directory
  • Tool Change (since 1.9.11)
  • Z-Probe

Custom Widgets

  • cncjs-widget-boilerplate - Creating custom widgets for CNCjs.

Pendants

Boilerplate Code

  • cncjs-pendant-boilerplate - A bare minimum example to develop a cncjs pendant.

Existing Pendants

  • cncjs-pendant-keyboard - A simple pendant (using wireless keyboard or usb) to CNCJS.
  • cncjs-pendant-numpad - A simple pendant (using wireless numpad or usb) to CNCJS.
  • cncjs-pendant-lcd - CNCjs Web Kiosk for Raspberry Pi Touch Displays.
  • cncjs-pendant-ps3 - Dual Shock / PS3 Bluetooth Remote Pendant for CNCjs.
  • cncjs-pendant-raspi-gpio - Simple Raspberry Pi GPIO Pendant control for CNCjs.
  • cncjs-pendant-alexa - Voice jog control via a custom Alexa skill ("Alexa, ask mill x plus 20"), with per-axis travel limits and state-gated jogging.

Tablet UI

  • cncjs-pendant-tinyweb - A tiny web console for small 320x240 LCD display.

  • cncjs-shopfloor-tablet - A simplified UI for cncjs optimized for tablet computers in a production (shop floor) environment.

Browser Support


Chrome

Edge

Firefox

IE

Opera

Safari
Yes Yes Yes Not supported Yes Yes

Supported Node.js Versions

Version Supported Level
<= 10 Not supported
12 Supported
>= 14 Recommended

Getting Started

Node.js Installation

Node.js 14 or higher is recommended. You can install Node Version Manager to manage multiple Node.js versions. If you have git installed, just clone the nvm repo, and check out the latest version:

bash
git clone https://github.com/creationix/nvm.git ~/.nvm
cd ~/.nvm
git checkout `git describe --abbrev=0 --tags`
cd ..
. ~/.nvm/nvm.sh

Add these lines to your ~/.bash_profile, ~/.bashrc, or ~/.profile file to have it automatically sourced upon login:

bash
export NVM_DIR="$HOME/.nvm"
[ -s "$NVM_DIR/nvm.sh" ] && . "$NVM_DIR/nvm.sh" # This loads nvm

Once installed, you can select Node.js versions with:

nvm install 14
nvm use 14

It's also recommended that you upgrade npm to the latest version. To upgrade, run:

bash
npm install npm@latest -g

Installation

Install cncjs as a non-root user, or the serialport module may not install correctly on some platforms like Raspberry Pi.

bash
npm install -g cncjs

If you're going to use sudo or root to install cncjs, you need to specify the --unsafe-perm option to run npm as the root account.

bash
sudo npm install --unsafe-perm -g cncjs

Check out https://github.com/cncjs/cncjs/wiki/Installation for other installation methods.

Upgrade

Run npm install -g cncjs@latest to install the latest version. To determine the version, use cncjs --version.

Usage

Run cncjs to start the server, and visit http://yourhostname:8000/ to view the web interface. Pass --help to cncjs for more options.

…

Instead of passing command line options for --watch-directory, --access-token-lifetime, --allow-remote-access, and --controller, you can create a ~/.cncrc file that contains the following configuration in JSON format:

json
{
    "mountPoints": [
        {
            "route": "/pendant",
            "target": "/home/pi/tinyweb"
        },
        {
            "route": "/widget",
            "target": "https://cncjs.github.io/cncjs-widget-boilerplate/v1/"
        }
    ],
    "watchDirectory": "/path/to/dir",
    "accessTokenLifetime": "30d",
    "allowRemoteAccess": false,
    "controller": ""
}

To troubleshoot issues, run:

cncjs -vvv

Configuration File

The configuration file .cncrc contains settings that are equivalent to the cncjs command-line options. The configuration file is stored in user's home directory. To find out the actual location of the home directory, do the following:

  • Linux/Mac

    bash
    echo $HOME
  • Windows

    bash
    echo %USERPROFILE%

Check out an example configuration file here.

File Format

See https://github.com/cncjs/cncjs/issues/242#issuecomment-352294549 for a detailed explanation.

…

Documentation

https://cnc.js.org/docs/

Examples

There are several *.gcode files in the examples directory. You can use the GCode widget to load a GCode file and make a trial run.

If you don't have a CAM software, try using jscut to create G-Code from *.svg. It's a simple CAM package that runs in the browser.

Check out a live demo at http://jscut.org/jscut.html.

Contributions

Use GitHub issues for requests.

Pull requests welcome! Learn how to contribute.

Localization

You can help translate resource files in both of app and server directories from English to other languages. Check out Localization guide to learn how to get started. If you are not familiar with GitHub development, you can open an issue or send your translations to [email protected].

Locale Language Status Contributors
cs Čeština (Czech) ✔ Miroslav Zuzelka
de Deutsch (German) ✔ Thorsten Godau, Max B.
es Español (Spanish) ✔ Juan Biondi, hasecilu
fr Français (French) ✔ Simon Maillard, CorentinBrulé
hu Magyar (Hungarian) ✔ Sipos Péter
it Italiano (Italian) ✔ vince87
ja 日本語 (Japanese) ✔ Naoki Okamoto
nb Norsk (Norwegian) ✔ Stian Kristensen
nl Nederlands (Netherlands) ✔ dutchpatriot
pt Português (Portugal) ✔ Cheton Wu
pt-br Português (Brasil) ✔ cmsteinBR
ru Ру́сский (Russian) ✔ Denis Yusupov
uk українська (Ukrainian) ✔ khvalera
tr Türkçe (Turkish) ✔ Ali GÜNDOĞDU
zh-cn 简体中文 (Simplified Chinese) ✔ Mandy Chien, Terry Lee
zh-tw 繁體中文 (Traditional Chinese) ✔ Cheton Wu

Donate

If you would like to support this project, you can make a donation using PayPal. Thank you!

Contributors

This project exists thanks to all the people who contribute. [Contribute].

Backers

Thank you to all our backers! [Become a backer]

Sponsors

Support this project by becoming a sponsor. Your logo will show up here with a link to your website. [Become a sponsor]

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> Details

PublishedAug 1, 2026
UpdatedSep 17, 2026
Category编程语言
PricingOpen source

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