--- title: Gatsby.js Progressive Web Apps (PWA) --- ## Gatsby.js PWA Gatsby is designed to provide top-notch performance out of the box. It handles code splitting, code minification, and optimizations like pre-loading in the background, image processing, etc., so that the site you build is highly performant, without any kind of manual tuning. These performance features are a big part of supporting the progressive web app approach. Gatsby mets the three baseline criterias for it to quality as PWA. - It must run under HTTPS. - It must include a Web App Manifest. - It must implement a service worker. ### More Information: Check out the Gatsby.js official docs for Progressive Web Apps at [Gatsby PWA](https://www.gatsbyjs.org/docs/progressive-web-app/). For more information and learn more, visit: [Gatsby.js official site](https://www.gatsbyjs.org/tutorial/)