Online circuit simulator
Build. Simulate.
Understand.
Draw a schematic, press run, and watch real current move through it. A precise electronics lab that lives in a browser tab — free, no sign-up, nothing to install.
- Components
- 22
- Analyses
- DC · Tran · AC
- Price
- $0
A solved loop — voltages and current are what the analysis returns.
Not a picture of a simulator — a simulator.
Plenty of tools animate a cartoon. CircuitSimulate solves the circuit and draws the answer.
Real analysis, not a demo
A modified-nodal-analysis solver runs DC operating point, transient and AC sweeps — the same math SPICE uses. Every number on screen is solved, never faked.
See the electricity
Current animates along the wires it actually flows through. Nodes are coloured by solved voltage, LEDs light by real forward current.
Built for the browser
Static pages, one interactive island, solver in a Web Worker. It loads fast, works offline after first visit, and never uploads your circuit.
Measure like the bench
Drop a multimeter or a two-channel oscilloscope onto the canvas and read volts, amps and waveforms with real time/div and volt/div.
Four steps to a working circuit
- 01
Place
Drag parts from the palette onto a snapping grid.
- 02
Wire
Click terminal to terminal — wires route orthogonally and snap to pins.
- 03
Run
Pick DC, transient or AC. The solver runs in a background worker.
- 04
Read
Watch current flow, read node voltages, or scope a waveform.
Open a blank canvas.
No account, no download. Your circuit stays in your browser until you choose to share it.
Launch CircuitSimulate