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1.9.0 • Public • Published

@jscad/web: OpenJSCAD Web UI

This is the Web based UI for OpenJsCAD, either to host yourself, or use directly at


npm version Build Status stability-stable

Dependency Status devDependency Status lerna

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Table of Contents


Immediate Use (no installation)

Go to (Tested browsers include Chrome, Firefox, Opera, Safari)

Use within a Web Site (pre built files)

cd base-directory-of-website
git clone
cd packages/web . // this is where the web version is
cp ../examples ./examples // copy the examples here
<start a web server here>

And then access the contents via the URL of the web-site.

  • index.html for the standard version
  • viewer-minimal.html for the barebones viewer
  • viewer-options.html for the 'all options' variant of the above

NOTE: You might need configuration changes to allow access to the some of the contents (examples etc).

Use within a Web Site (custom build)

install node.js > 6.0
cd base-directory-of-website
git clone
npm run boostrap
cd packages/web . // this is where the web version is
cp ../examples ./examples // copy the examples here
<start a web server here>
modify the code as you see fit (see 'Adding new features the other modules in this repository' section)

Use of proxies for remote file loading:

if you want the capability , just like the official site, to load remote projects/files directly from the web based user interface, but without the hassle with CORS issues, you can use a proxy file (see & remote.php): this is a server side script that does the following

  • caches the remote file locally on the server
  • returns the local path to the downloaded file for OpenJSCAD to use

use and path of the proxy can be set by:

  • changing the proxyUrl value in src/ui/index.js
  • since this is hardcoded , if you do not use the provided dev server, rebuild your main file (npm run build-web etc, see Development)

then you can use it like so: https:///?uri= or https:///#

Note: a PR with a node.js based proxy would be a welcome addition :)


We offer pre-built versions of OpenJSCAD to be uses directly here :

but you can also rebuild them manually if you need :

  • standard: npm run build-web
  • minimalist: npm run build-min
  • with options: npm run build-opt

Adding new features the other modules in this repository:

Since OpenJSCAD is made up of multiple dependent modules (csg.js, openscad-openjscad-translator etc), the easiest method is to use npm link to have a 'live' updating development version of OpenJSCAD:

  • create a base directory
  • clone this repository git clone
  • go into folder cd
  • install dependencies & setup inter package links npm run bootstrap
  • go into the web folder : ```cd packages/web````
  • if desired, start dev server: npm run start-dev

Note : you can also change the code in all the other packages/xxx folders and it will also impact the web ui (ie : if you make changes to packages/core in parts that are used in the Web Ui, you do not need to run additional commands)

Adding new features in CSG.js or other modules:

Then, for example for CSG.js:

  • go back to base directory cd ..
  • clone CSG.js git clone
  • go into folder again cd
  • now type npm link ../csg.js to make @jscad/csg refer to local ../csg.js.

You can now make changes to the CSG.js code and see it impact your locally running copy of OpenJSCAD live.


Known Issues

There are a few known issues, please be sure to check this out before submitting additional bug reports/issues.

  • Q: issues running certain npm commands like npm run build-web with cnpm

  • A: this is a know issue in cnpm , see issue #283 for more information

  • Q: Attempting to use OpenJSCAD from file:// in Chrome results in errors like "File Error: [EncodingError] Please check permissions error."

  • A: This is a permissions issue in Chrome : restart chrome using the "--allow-file-access-from-files" option

Contribute is part of the JSCAD Organization, and is maintained by a group of volunteers. We welcome and encourage anyone to pitch in but please take a moment to read the following guidelines.

Thank you to all the people who have already contributed to this project:

  • If you want to submit a bug report please make sure to follow the Reporting Issues guide. Bug reports are accepted as Issues via GitHub.

  • If you want to submit a change or a patch, please see the Contributing guidelines. New contributions are accepted as Pull Requests via GithHub.

  • We only accept bug reports and pull requests on GitHub.

  • If you have a question about how to use the, then please start a conversation at the User Group. You might find the answer in the User Guide.

  • If you have a change or new feature in mind, please start a conversation with the Core Developers and start contributing changes.

Small Note: If editing this README, please conform to the standard-readme specification.


See for more details


OpenJSCAD and its sub components are built upon great open source work, contribution & modules

  • csg.js core & improvements by Evan Wallace, Eduard Bespalov, Joost Nieuwenhuijse, Alexandre Girard

For input/output


and many more!


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


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


The MIT License (MIT) (unless specified otherwise)


Simple JSCAD example (logo.jscad) try it:

More sophisticated JSCAD example, with functions dedicated to object generation and with interactive parameters (gear.jscad) try it :

Import of STL models (frog-OwenCollins.stl) try it:

Drag & drop a local file:

Drag & drop multiple files (Chrome & Firefox) or a folder (Chrome):

See Also

  • OpenJsCAD, starting point of
  •, another place of inspiration, where the OpenSCAD translator was adapted from
  • CoffeeSCad, JavaScript simplified (no more {}) (defunct)
  • stl2pov to convert .stl to .pov, and then render via
  • P3D STL/AMF/OBJ viewer

That's all for now,

Rene K. Mueller, Jeff Gay, Mark Moissette & JSCAD Organization




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