Guides
21 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 Alternative in 2026 | CircuitSim
Digilent retires Multisim Live on September 15, 2026. CircuitSim opens Multisim Live files, runs SPICE in the browser, and adds a component studio and classroom groups.
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.
Circuit Simulator vs KiCad, EasyEDA, SkyCAD, Tinkercad (2026) | CircuitSim
KiCad and EasyEDA draw boards, SkyCAD draws panels, Tinkercad teaches on a breadboard. What each outputs, and why a SPICE simulator fits a circuits course.
CircuitJS Alternative (2026): AC Sweep and Real Part Models
The Falstad simulator has no AC sweep, DC sweep, or real part models. What CircuitJS does well, what it cannot do, and how to rebuild a circuit in CircuitSim.
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.
CircuitSim vs NI Circuit Design Suite: 2026 Comparison | CircuitSim
NI Circuit Design Suite is Windows-only, from $1,271. CircuitSim runs in the browser from $0. Price, platform, analyses, parts, and classrooms compared.
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.
Multisim Live Alternative for PLTW Digital Electronics
Multisim Live retires September 15, 2026. For PLTW Digital Electronics classrooms on Chromebooks, CircuitSim runs SPICE in the browser and opens Multisim Live files.
Multisim Live Lab Manuals After the Shutdown | CircuitSim
Multisim Live retires September 15, 2026, and lab manuals built on it still assign it. CircuitSim runs the same SPICE labs in the browser and opens the downloaded files.
SPICE Convergence Errors and How to Fix Them | CircuitSim
A SPICE simulation that will not converge is usually telling you something specific about the circuit. Here is what the error means, the six causes behind most of them, and the fixes in the order worth trying.
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 Happened to Multisim Live? Why It Redirects to NI | CircuitSim
Multisim Live retired on September 15, 2026. multisim.com redirects to NI Circuit Design Suite, from $1,271. What changed, and what to do about your circuits. CircuitSim is the recommended replacement.
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.