Browse free open source JavaScript Interpreters and projects below. Use the toggles on the left to filter open source JavaScript Interpreters by OS, license, language, programming language, and project status.

  • Our Free Plans just got better! | Auth0 Icon
    Our Free Plans just got better! | Auth0

    With up to 25k MAUs and unlimited Okta connections, our Free Plan lets you focus on what you do best—building great apps.

    You asked, we delivered! Auth0 is excited to expand our Free and Paid plans to include more options so you can focus on building, deploying, and scaling applications without having to worry about your security. Auth0 now, thank yourself later.
    Try free now
  • $300 Free Credits to Build on Google Cloud Icon
    $300 Free Credits to Build on Google Cloud

    New to Google Cloud? Get $300 in credits to explore Compute Engine, BigQuery, Cloud Run, Gemini Enterprise Agent Platform, and more.

    Start your next project with $300 in free Google Cloud credit. Spin up VMs, run containers, query petabytes in BigQuery, or build agents with Gemini Enterprise Agent Platform. Once your credits are used, keep building with 20+ always-free tier products including Compute Engine, Cloud Storage, GKE, and Cloud Run functions. No commitment required—just sign up and start building.
    Claim $300 Free
  • 1
    A simple, intuitive Javascript keyboard for Indic Languages such as Hindi, Sanskrit and Gujarati, based on Unicode characters.
    Downloads: 3 This Week
    Last Update:
    See Project
  • 2
    The MathExt library was made to parse and calculate formulas of any complexity. It can easily be integrated into web applications. As developer you can set all kind of settings. You can even specify what commands should be available to the user.
    Downloads: 3 This Week
    Last Update:
    See Project
  • 3
    Whitebeam Web Application Server

    Whitebeam Web Application Server

    JavaScript/XML engine for Apache

    Whitebeam is a complete rapid development Web application server integrating Apache, Posgresql, Mozilla's SpiderMonkey JavaScript engine with it's own powerful XML/XPath based secure application framework.
    Downloads: 1 This Week
    Last Update:
    See Project
  • 4
    KAREL 3D

    KAREL 3D

    Learning programming language for kids

    This is learning programming language for children Karel-3D. By words from LightBot: "Get kids hooked on coding with minutes!" Created by Karel 3D from the 8-bit microcomputer PMD 85-2 in 1986. His later version of Karel the Robot in 3D, created first in the Slovak Republic. JavaScript variant include only one small HTML file tested and works on all devices with keyboard and full JavaScript support in internet browser, or alternative pre-compiled JAVA V8 .jar file with webEngine and JavaFX and code in string. ZIP Contains examples in TXT file. More pictures and examples is here at Wiki. Wiki include ZIP with scan of original historical manuals in Slovak language from years 1987 - 1990 Today exist some variants (not mine) like: LightBot or Swift Playgrounds on tablets. Karel 3D from Version 8 is different from other Karels, can bulid a Bridges. WebGL version: https://sourceforge.net/projects/karel-3d-webgl/ C++ version: https://sourceforge.net/projects/karel-3d-cpp/
    Downloads: 2 This Week
    Last Update:
    See Project
  • Ship Agents Faster Icon
    Ship Agents Faster

    Transform your applications and workflows into powerful agentic systems at global scale.

    Gemini Enterprise Agent Platform lets you rapidly build, scale, govern and optimize production-ready agents grounded in your organization's data. The platform enables developers to build custom or pre-built agents for virtually any use case. New customers get $300 in free credits.
    Get Started Free
  • 5
    Embed Prolog directly in your Python, C# or Javascript program using the yield keyword. There is no API standing between your code and Yield Prolog, so you can use all language features, including arrays, file I/O, user interaction and your own classes.
    Downloads: 1 This Week
    Last Update:
    See Project
  • 6
    Askari is a custom version of the Mozilla Rhino Javascript Engine optimized for use in standalone applications and servlets. It is easily extensible either with Java libraries (SWT is bundled) or by adding to the included JavaScript library framework.
    Downloads: 1 This Week
    Last Update:
    See Project
  • 7
    The project aims to extend the PHP scripting language to enable PHP developers to write bioinformatics applications more rapidly than if they had to start from scratch using \"vanilla php\".
    Downloads: 1 This Week
    Last Update:
    See Project
  • 8
    ExtXL is to help dynamic web pages(JSP,Velocity) to affiliate with extjs v2.0(extjs.com,openext.sf.net).We provide an IoC(Inversion of Control) engine and a set of mappers for most of ext widgets that automatically generate widgets in XHTML format.
    Downloads: 1 This Week
    Last Update:
    See Project
  • 9
    Xemeiah is a fast, modular and scalable XML Framework written in C++, with an efficient DOM and Oasis-compliant XSLT Processor. Xemeiah modules include a persistence layer, a fast Ajax Web Server, a Media Player, ImageMagick frontend, java bindings...
    Downloads: 1 This Week
    Last Update:
    See Project
  • Custom VMs From 1 to 96 vCPUs With 99.95% Uptime Icon
    Custom VMs From 1 to 96 vCPUs With 99.95% Uptime

    General-purpose, compute-optimized, or GPU/TPU-accelerated. Built to your exact specs.

    Live migration and automatic failover keep workloads online through maintenance. One free e2-micro VM every month.
    Try Free
  • 10
    Are you a fan of FORTH/RPN math? Need an easy, quick way to access files, do calculations, or just about anything else on your computer? Enter CUE (abrv. Q). Optimized for short, quick programs this language can be used for many different chores.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 11
    The DCN Toolkit contains the DCN Interpreter for processing XML datastreams in a CORBA/ECMA compliant environment. See http://www.dataconsortium.org for information about the Data Consortium Namespace and its RDF Dictionary.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 12
    A perl script that parses given JavaScript source files for documentation in JavaDoc style, and generates HTML description page about functions, its parameters, etc.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 13
    ESA Provides a wrapper around the .NET scripting engine which adds support for hosting the scripting engine in a seperate AppDomain, and includes a Design-time environment for applications.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 14
    ESMJS, Enhanced SpiderMonkey JavaScript, (will) provide an easy way to integrate Javascript Plugins into C applications.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 15
    Clean, small, ECMA-262 compliant core javascript interpreter written in c++.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 16
    The Esoteric Project is a project devoted to providing interpreters and/or compilers for every Turing-complete Esoteric Programming Language.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 17
    Javascript bindings for C++, a Javascript interpreter/shell & Javascript/C++ module system. It includes a few Javascript classes and modules. It supports easy embedding of Javascript in C++ and vice versa. The currently supported engine is Spidermonkey.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 18

    Hellsing

    Distributed JavaScript Engine

    Hellsing is a distributed JavaScript engine.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 19
    Put Java code embedded in your HTML pages, executed client-side (as old JavaScript) with all its power and ease of use (a lot MORE than old JavaScript)!!!
    Downloads: 0 This Week
    Last Update:
    See Project
  • 20
    JFolder is a web-based application development and management tool. It allows users to create applications through a web browser without writing any code. The current release includes an implementation of the Pet Store written without code.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 21
    JLog is a Prolog interpreter written in Java. It is fast and perfectly suited for education. It includes source editor, query panels, online help, animation primitives, and a GUI debugger. JScriptLog is Prolog in JavaScript.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 22
    This project implements turtle graphics in Javascript, with the intent to help teach young children the basics about programming.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 23
    JSGold is a GOLD Parser Engine in C++ for generating context-free grammar parsers in javascript.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 24

    Jainja

    Jainja is a JVM (Java Virtual Machine) written in Java

    Jainja is a JVM (Java Virtual Machine) written in Java. The VM is developed by using the smallest possible subset of Java in order to run on top of multiple environments : Java SE, JavaME, Android, Javascript, and even natively.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 25
    A Javascript MSX-BASIC translator. Run simple MSX-BASIC code directly in the browser, or even embed MSX-BASIC programs on your website :)
    Downloads: 0 This Week
    Last Update:
    See Project
  • Previous
  • You're on page 1
  • 2
  • 3
  • Next
Auth0 Logo