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wwwBASIC is an implementation of BASIC (Beginner’s All-purpose Symbolic Instruction Code) designed to be easy to run on the Web.

How to use wwwBASIC

You can include wwwBASIC directly in Web pages:

<!DOCTYPE html>
    <script src="https://google.github.io/wwwbasic/wwwbasic.js"></script>
    <script type="text/basic">
      PRINT "Hello World!"
      FOR i = 1 to 10
        PRINT "Counting "; i
      NEXT i

You can also import wwwBASIC as a Node.js module.

Either install it via npm: npm install -S wwwbasic

or clone the repository: git clone https://github.com/google/wwwbasic.git

Then run your code:

var basic = require('wwwbasic'); // from NPM
// var basic = require('./wwwbasic.js'); // from within the cloned repository directory

PRINT "Hello World!"
FOR i = 1 to 10
  PRINT "Counting "; i


It supports a range of features including:

Test Suite

wwwBASIC has a “Work-in-progress” test suite. It can be run with: ./run-tests.sh.


But Why?

The immediate trigger for wwwBASIC’s existence was Ed Thelen’s Nike Hercules simulator. It had been written in BASIC some time back, then ported to some unknown version of FreeBasic. However, while he had screenshots and source code, it also included a Windows .EXE to a download, and the statement, “guaranteed to be free of viruses” :-/

As it was meant to capture how something historical worked, it seemed unfortunate that something of this sort couldn’t just be accessible directly on the web. Various whole system emulators that run on the web are available, but booting a whole system for a small program seemed like overkill.

Hence the first goal was to get this to run.

From there, bringing up DONKEY.BAS seemed a nice logical milestone. Bringing up GORILLA.BAS and NIBBLES.BAS are a current focus.

Source Code Headers

Every file containing source code must include copyright and license information. This includes any JS/CSS files that you might be serving out to browsers. (This is to help well-intentioned people avoid accidental copying that doesn’t comply with the license.)

Apache header:

Copyright 2018 Google LLC

Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at


Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
See the License for the specific language governing permissions and
limitations under the License.