LTspice

Fast • Free • Unlimited

LTspice® is high performance SPICE simulator software, including a graphical schematic capture interface. Schematics can be probed to produce simulation results—easily explored through LTspice’s built-in waveform viewer. LTspice’s enhancements and models improve the simulation of analog circuits when compared to other SPICE solutions.

Download LTspice

Download our LTspice simulation software for the following operating systems:

Date models updated - Aug 3 2022

Download for Windows 7, 8, and 10 32-bit Version 17.0.35

Download for Windows 7, 8, and 10 64-bit Version 17.0.35

Download for MacOS 10.10 and forward Version 17.0.42

Download for MacOS 10.9 (End of Support)

Download for Windows XP (End of Support)

Get Support

Visit the LTspice Forum in EngineerZone to ask questions (or answer them) or add comments about LTspice.

LTspice EngineerZone Forum

Find Demo Circuits

Explore the entire library of ready-to-run LTspice demonstration circuits.

Explore demo circuits

Learn How to Use LTspice

Instructional Videos

Probe simulation in LTspice

Getting Started Tutorial

Learn about LTspice and how to use it. This video series includes an introduction to the LTspice schematic capture program via layout of a simple circuit.

Behavioral voltage source chart in LTspice

Essentials Tutorial

Learn how to use transformers, add third party models, create, work with symbols, and more.

Diagram comparing capacitor voltages in LTspice

AC & Noise Analysis Tutorial

Learn how to perform a basic AC analysis in LTspice as well as some capabilities you might not already know about. Also learn how to set up a noise simulation in LTspice to view both input and output referred voltage noise.

Tips and Articles

Circuit diagram in LTspice

Get Up and Running with LTspice

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.

Read the article

Diagram of triangular and sawtooth waveforms in LTspice

Tips and In-Depth Articles

Our extensive collection of technical resources tackles a wide range of LTspice topics.

Recommended Reading List

Table showing LTspice keyboard hotkeys

Keyboard Shortcuts

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.

Keyboard Shortcuts