Build and Simulate Circuits in Your Browser

A free browser-based electronic circuit simulator with drag-and-drop components, animated current flow, and real-time voltage/current readouts. Build circuits with batteries, resistors, LEDs, capacitors, switches, and diodes. Load example circuits or create your own — all in your browser.

How to Use the Circuit Simulator

1
Add components

Drag components from the palette onto the canvas. Click a component to select it and edit its properties (voltage, resistance, etc).

2
Connect with wires

Click the Wire tool, then click two component terminals to connect them. The wire auto-routes between endpoints.

3
Simulate

Click Simulate to run the DC analysis. See current flow animated through wires and voltage levels displayed at each node.

Design and simulate electronic circuits with an interactive drag-and-drop editor

Components
Drag components from the palette onto the canvas. Click to select, drag to move.
Properties
Drag components from the palette onto the canvas. Click to select, drag to move.
Example Circuits
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