Compare the Top Free Circuit Simulation Software as of July 2025

What is Free Circuit Simulation Software?

Circuit simulation software is software that allows users to create and analyze electronic circuits. It uses mathematical models to simulate the behavior of electrical components such as resistors, capacitors, and transistors. This software can be used for educational purposes, research, or designing complex systems. Its user-friendly interface allows users to easily input circuit parameters and view results in real-time. With its advanced features and accurate calculations, this software is a valuable tool for both novice and experienced engineers. Compare and read user reviews of the best Free Circuit Simulation software currently available using the table below. This list is updated regularly.

  • 1
    EasyEDA

    EasyEDA

    EasyEDA

    More than 1 million real-time updated components have been created, letting you focus on the design, and you can create or import your own common libraries. Benefit from China’s leading electronic components distributor - LCSC , EasyEDA supports direct links to more than 200,000 real-time, in-stock components at LCSC . Designers can refer to stocks, prices, and order at any time during design. It has the same features as the online version, and has more design areas, we have made a lot of improvements, recommended. Easy to use. If you have used other PCB tools then you can use it even more quickly. Light weight, less resource hungry, smoother experience, speed up your design. No activation, just register and login to use, no licensing required. Local backup automatically with document recovery at any time. Your files will also be saved on the cloud server, giving you double backup for you data security.
    Starting Price: $4.9 per month
  • 2
    LTspice

    LTspice

    Analog Devices

    Its graphical schematic capture interface allows you to probe schematics and produce simulation results, which can be explored further through the built-in waveform viewer. The key to most circuit designs is the speed with which you can reach an understanding of your circuit, its correctness, and its limitations. LTspice outperforms many other simulation tools and enables you to iterate your designs in minimal time. Keyboard shortcuts are an alternate way to invoke one or more commands in LTspice that would otherwise only be accessible by clicking through the menu or toolbar. Our extensive collection of technical resources tackles a wide range of LTspice topics. Learn how to use transformers, add third-party models, create, work with symbols, and more.
    Starting Price: Free
  • 3
    NL5 Circuit Simulator
    There are plenty of circuit simulators available on the market. Just read their ads: high performance, extremely fast, industry-standard (i.e. SPICE), easy to use, highly intuitive. If you want to see if a tool is worth using, try it yourself. That's what many NL5 users already did. I hope they will share their encouraging stories soon. A few words about what should you expect from NL5. It is not one more SPICE (and not even close), nor is it a SPICE replacement. For some tasks NL5 is far superior, for others simply good, and some tasks are not for NL5 at all.
    Starting Price: $500 one-time payment
  • 4
    CircuitLab

    CircuitLab

    CircuitLab

    Easy-wire mode lets you connect elements with fewer clicks and less frustration. Unit-aware expression evaluation lets you plot arbitrary signals of interest, such as differential signals or power dissipation. In-browser simulation and plotting lets you design and analyze faster, making sure your circuit works before ever picking up a soldering iron. Advanced simulation capabilities include frequency-domain (small signal) simulation, stepping circuit parameters through a range, arbitrary Laplace transfer function blocks, and more. Work with multiple signals easily with configurable plotting windows, vertical and horizontal markers, and calculations on signals. Draw generic rectangular symbols for IC or system-level wiring diagrams with just a few clicks.
    Starting Price: $24 per year
  • 5
    EveryCircuit

    EveryCircuit

    EveryCircuit

    One animated circuit is worth a thousand equations and diagrams. Animations of voltages, currents, and charges are displayed right on top of the schematic, providing great insight into circuit operation. The real-time circuit simulation engine is custom-built for speed and interactivity. Easy one-click simulation, from simple resistors and logic gates to complex transistor-level oscillators and mixed-signal designs. While the simulation is running, you can flip switches, adjust potentiometers, tune LED current limiting resistors, ramp up input voltages, etc. The circuit will immediately respond to your changes, in real time. Mini-waveforms on top of schematic wires look different for digital and analog signals. Constant analog voltages are shown as numbers, digital wires are color-coded. Any pair of time-domain signals may be plotted in the XY mode. The oscilloscope scale and grid ticks are auto-updated to convenient values as the data changes.
    Starting Price: $15 one-time payment
  • 6
    DCACLab

    DCACLab

    DCACLab

    Our online circuit simulator bridges the gap between theory and practice with an intuitive interface. It allows you to design, simulate, and share electronic circuits online, witnessing the interplay of components in real-time. You can directly observe and manipulate the behavior of circuits, making learning more engaging and effective. For educators, DCACLab enhances your lessons with interactive diagrams and live demonstrations. For students, it provides a safe space to experiment and learn, leading to a deeper understanding of electronics. With DCACLab, frustration turns into hands-on learning and comprehension. Discover the power of a realistic multimeter in our interactive simulator. With functions for measuring ohm, voltage, and resistance, it provides an enriching and realistic learning experience. Dive into the world of electronics with ease and understanding.
    Starting Price: $9 per month
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