LLNL's VisIt is an open source, interactive, scalable, visualization, animation and analysis tool. From Unix, Windows or Mac laptop or workstations, users can interactively visualize and analyze data ranging in scale from small (<10 core) desktop-sized projects to large (>100,000 core) leadership-class computing facility simulation campaigns. Users can quickly generate visualizations, animate them through time, manipulate them with a variety of operators and mathematical expressions, and save the resulting images and animations for presentations. VisIt contains a rich set of visualization features to enable users to view a wide variety of data including scalar and vector fields defined on two- and three-dimensional (2D and 3D) structured, adaptive and unstructured meshes. Owing to its customizable plugin design, VisIt is capable of visualizing data from over 120 different scientific data formats.


Machines and Versions

See LC visualization software page.




None required to run visit (see below for PATH setting).


To run VisIt, type /usr/gapps/visit/bin/visit. For convenience, regular users should add /usr/gapps/visit/bin to their PATH environment variable. After doing so, you can just type visit to run VisIt. To run a specific version, use the -v <version-no> as in visit -v 3.2.0


VisIt's Getting Started Manual and User's Manual can be downloaded from the VisIt Manuals webpage.

For assistance from VisIt developers, please post inquiries to VisIt's GitHub Discussions. To do so, you will need a free GitHub account. If you strongly believe your matter cannot be handled in a public setting such as this, you may sparingly use visit-help@llnl.gov.

VisIt Support Line

On-site: 4-2visit (4-2847)
Off-site: 925-424-2visit (925-424-2847)
Hours of Operation:
Monday-Friday 8:00 AM–5:00 PM (Pacific time zone) except LLNL holidays.
Closed during the lunch hour.

If you call during lunch or after hours, you may leave a message and a developer will call you back when normal business hours resume.

For phone or discussion post inquiries, VisIt developers do try to respond in less than 4 hours.


VisIt can be installed on a local platform. Go to the VisIt website to download the latest version of VisIt.