Load a program
Pick an example sketch or open the .hex your IDE exports with Sketch > Export Compiled Binary.
WAVESPEED AI UNO SIMULATOR Runs on your device
100% FREE
Free Arduino Uno SimulatorTest the sketch before the hardware.
A simulated Uno (ATmega328P at 16 MHz) runs your compiled program or one of ten examples in real time.
Wire parts to its pins, press buttons, turn the knob and read the serial monitor.
Uno pin mapSerial monitorNo sign-up
No sign-up No upload Nothing to install
Loading the simulator…
Programs run in your browser and never leave your device.How to get a .hex file
THREE SIMPLE STEPS
How to use the Arduino Uno Simulator
Connect parts
Add LEDs, buttons, a potentiometer, a 7-segment digit, a 16x2 display, a servo or a buzzer and pick their Uno pins.
Run it
Start the board, interact with the parts and watch the serial output and plotter.
WaveSpeed AI
Show your project off.
Make visuals and clips for your electronics project with WaveSpeed AI.
Image Generator
Make a product shot of your gadget from a prompt.
Video Generator
Turn a photo of your build into a short demo clip.
3D Generator
Turn a sketch of your enclosure into a 3D model.
- 1,000+ AI models
- Image, video and 3D
- Pay as you go
$1 in free credits for eligible new accounts. No card needed. Generators have separate account and credit requirements. The Arduino simulator is free.
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Arduino Uno Simulator FAQ
Is the Uno simulator free?
Yes, with no account, no watermark, no time limit and nothing to install.
How do I simulate an Arduino Uno online?
Pick an example sketch or open your compiled .hex, wire parts to the Uno's pins and press Run. It runs in your browser in real time, with a serial monitor.
How do I run my own sketch?
Export the .hex from the Arduino IDE (Sketch > Export Compiled Binary), arduino-cli or PlatformIO and open it here.
Which Uno features work?
Digital pins D0–D13, analog inputs A0–A5, PWM on pins 3, 5, 6, 9, 10 and 11, the serial port, timers, interrupts, EEPROM and the watchdog of the ATmega328P, with real clock timing.
Is my program uploaded?
No. It runs in your browser and never leaves your device.
Is this an official Arduino product?
No. Arduino is a trademark of Arduino SA; this simulator is made by WaveSpeed AI and is not affiliated with or endorsed by Arduino.
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