Bolt is a builder that runs entirely in the browser and starts from a natural-language description to generate complete web applications. The code runs inside the environment itself, so you can test the result without installing tooling.
Bolt Cloud adds the infrastructure that would normally require external setup: server functions, unlimited databases per project, file storage, secrets and user management with roles and password resets. The official documentation records a relevant constraint: only JavaScript backends are supported.
Publishing takes one click, on a built-in subdomain, with custom domains, DNS and HTTPS. For projects that need a mobile app, there is an Expo integration that produces builds for the App Store and Google Play.
The generated code belongs to the user, can be exported and kept in a GitHub repository, with automatic commits and branch control.