In another article, I explained how you could download and process a JWST image using PixInsight; however, not everyone owns PixInsight, so I experimented with using freely available tools to create a James Webb Space Telescope image. I came up with the steps in this article on my personal website at ErikWestermann.com. The article provides detailed steps to acquire and process a JWST image of M16, as shown below:

You can produce the same image using FITS Liberator, Photopea.com, and the JWST data.