Summary of AVR8JS – OPEN SOURCE ARDUINO SIMULATOR BASED ON JAVASCRIPT
AVR8js is an open-source JavaScript-based AVR/Arduino simulator that runs in browsers or any JavaScript environment. It enables compiling and running Arduino code without physical hardware, offering examples like multiple LED control and serial output. Unlike many closed simulators, AVR8js is moddable—developers can clone and modify the project—making it a flexible option for testing ideas when Arduino boards or sensors are unavailable.
Parts used in theAVR8js Arduino Simulator Project:
- AVR8js JavaScript AVR simulator codebase
- Arduino code sketches (example programs)
- Web browser or any JavaScript runtime
- Examples: multiple LEDs simulation
- Examples: serial output simulation
- Source code repository for cloning and modification
One of the things I love about JavaScritpt is the fact it keeps finding applications in different domains. One such use is in Arduino, with Espruino (open-source JavaScript interpreter for microcontrollers), and an interesting new one is the AVR8js. AVR8js is an open-source Arduino simulator based on JavaScript that can run in the cloud or virtually anywhere javascript runs.

Arduino has become a household name in the makers and hardware industry mostly thanks to it’s low-cost, easy to use the platform and the amazing community it has created over the years. Nevertheless, not everyone can always get access to an Arduino or a sensor, shield, or something to test run an idea, giving rise to the possibility of using simulators.
Arduino simulators haven’t necessarily been a household name, mostly becomes it is super easy to get an Arduino, one is probably lying next to you, and most simulators don’t work as expected as you wish. In the last 10 years, I think I have roughly tried 2 0r 3 simulators in the past: Proteus VSM and Autodesk TinkerCad. One thing familiar with most of those simulator platforms is that they are closed projects, and you are the mercy of the creators, which is something AVR8js is attempting to solve.
AVR8js is an AVR simulator that allows you to compile and run Arduino code directly in your browser!. AVR8js is open source in nature, and you clone the project and make modifications as you wish. Currently, there are examples of simulating multiple LEDs and even serial output.
Read more: AVR8JS – OPEN SOURCE ARDUINO SIMULATOR BASED ON JAVASCRIPT
- What is AVR8js?
AVR8js is an open-source JavaScript-based AVR/Arduino simulator that runs in the browser or any JavaScript environment. - Can I run Arduino code in AVR8js?
Yes, AVR8js allows you to compile and run Arduino code directly in your browser. - Is AVR8js open source?
Yes, AVR8js is open source and can be cloned and modified. - Does AVR8js simulate hardware like LEDs?
Yes, there are examples of simulating multiple LEDs. - Can AVR8js simulate serial output?
Yes, AVR8js includes examples demonstrating serial output simulation. - Do I need physical Arduino hardware to use AVR8js?
No, AVR8js lets you test Arduino code without physical hardware by running simulations in JavaScript. - Where can I modify AVR8js code?
You can clone the AVR8js source repository and make modifications as you wish.
