I recently discovered a new graphical user interface called the "lavaangui" that makes it spectacularly easy to fit confirmatory factor analysis (CFA), structural equation models (SEMs), and even latent growth curve models by drawing a path diagram online (https://solo-fsw.shinyapps.io/lavaangui/). It's completely free, and you don't even have to install a software on your computer.

See my Youtube tutorial below on how to use it:

https://www.youtube.com/watch?v=zJNrQ42JScc

The lavaangui uses the lavaan package in R in the background and has good documentation also (see reference below).

Reference

Karch, J. D. (2025). lavaangui: A Web-Based Graphical Interface for Specifying Lavaan Models by Drawing Path Diagrams. Structural Equation Modeling: A Multidisciplinary Journal, 1-12.

Article lavaangui : A Web-Based Graphical Interface for Specifying L...