The best free Circuit Simulator alternative to Fritzing is KiCad, which is also Open Source. If that doesn't suit you, our users have ranked more than 50 alternatives to Fritzing and nine of them are free Circuit Simulators so hopefully you can find a suitable replacement. Other interesting free Circuit Simulator alternatives to Fritzing are LibrePCB, EasyEDA, gEDA Project and Wokwi Arduino Simulator.
KiCad is an open source software suite for electronic design automation (EDA) - designing schematics of electronic circuits and printed circuit boards (PCB). KiCad is developed by Jean-Pierre Charras. And features an integrated environment between schematic capture, bill of...
LibrePCB is a free EDA software to develop printed circuit boards. It’s currently under heavy development to bring out first stable releases as soon as possible.
Schematic capture, Ngspice based simulation, PCB layout, custom PCB manufacturing, for electronic engineers, educators, students and hobbyists.
The gEDA project has produced and continues working on a full GPL'd suite and toolkit of Electronic Design Automation tools. These tools are used for electrical circuit design, schematic capture, simulation, prototyping, and production.
A web-app you can use to simulate circuits as well as run Arduino sketches right in the browser, using the open-source AVR8js platform.
eSim (previously known as Oscad / FreeEDA) is an open source EDA tool for circuit design, simulation, analysis and PCB design.
Educational virtual 3D laboratory simulator helps students, teachers, and tutors conduct electrical circuit experiments by providing realistic equipment access anywhere, avoiding availability issues and safety hazards, and enhancing learning with immediate feedback and...
Circuit Canvas is a modern, browser-based electronics circuit diagram tool designed for speed and clarity—no installs, no file management, just clean schematics you can draw, save, and share instantly.
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You can't draw simple circuit diagrams. KiCAD is mostly for PCB design.