Guides

9 Best Free Circuit Simulators in 2026 (Browser, Desktop, Mobile)

The nine best free circuit simulators in 2026, compared on engine, price, platform, and classroom fit. Plus the only browser tool that opens your Multisim Live files.

Best Multisim Alternatives in 2026: Every Option Compared

Multisim Live shuts down September 15, 2026. We compare every real alternative for students, teachers, and hobbyists, including the only browser simulator that opens your .ms14 and .msjs files.

Circuit Simulation for Schools — Group Licenses

Bring SPICE simulation to your school: browser-based, group licenses with NET-30 quotes, and student seats that collect no personal information.

Circuit Simulator for Chromebooks — No Install, Real SPICE

CircuitSim runs full SPICE simulation in the browser on any Chromebook — no install, no Linux container. Group licenses, student seats without emails.

CircuitLab Alternative (2026): Free, Actively-Developed Browser SPICE

CircuitLab is a paid browser SPICE simulator with a slower product cadence than it used to have. We compare it with CircuitSim, a free, actively-developed browser SPICE simulator with interactive simulation and custom interactive components.

CircuitSim for Educators: SPICE Simulation and Class Groups

A free, browser-based SPICE circuit simulator for electronics teaching. No install, runs on Chromebooks, with class groups, shared circuits, and license seats for departments.

Custom Components in CircuitSim: Turn Any SPICE Model into a Part

CircuitSim's library holds 1,200+ components and grows every week. When your part is not there yet, the custom component creator turns a manufacturer's SPICE model into a placeable, shareable part — in your browser.

EveryCircuit Alternative (2026): When You Need Real SPICE

EveryCircuit is a $14.99 one-time-purchase mobile-and-browser simulator with animated current-flow visualisation, but it is not a SPICE simulator. We compare it with CircuitSim, a free browser-based SPICE simulator with real DC, AC, and transient analysis.

Falstad Alternative (2026): When You Need Real SPICE in a Browser

Falstad Circuit Simulator is a free open-source browser visualisation tool, but it is not a SPICE simulator. We compare it with CircuitSim, a free browser-based SPICE simulator with real DC, AC, and transient analysis.

How to Save Your Multisim Live Circuits Before Shutdown

Multisim Live goes offline September 15, 2026. Your circuits are not lost — download each one as an MSJS file and import it into CircuitSim in minutes.

LTSpice Online

LTspice has no official browser version. We explain why, where LTspice still wins, and how to run SPICE-accurate simulation in your browser when you cannot install software.

test

Tinkercad Circuits Alternatives (2026): When to Upgrade

Tinkercad Circuits is the most-used browser circuit tool in classrooms. We cover what it does well, where its simulation stops, and how to step up to real SPICE in a browser without losing the no-install workflow.

What Is SPICE Simulation? A Plain-English Guide

SPICE (Simulation Program with Integrated Circuit Emphasis) is the standard for circuit simulation. How it works, .model vs .subckt, and dialects.