Package ehtml provides ways of rendering an error html page, using Go templates. It supports status code specific templates, with fallback to a generic error template. If no templates are defined, it uses a simple placeholder template. Define some templates: Parse them into a globale variable (or part of your Handler object): If you are using Gorilla mux, set the `NotFoundHandler` Optionally, extend `Data` to add more context. As an alternative, you can also roll your own implementation of `Provider`. And whenever something goes wrong in your handlers, call `Render()`: