# Error Pages
**`SWS`** provides custom HTML error pages for the HTTP `404` and `50x` status errors.
This feature is enabled by default and can be controlled either by the string `--page404` ([SERVER_ERROR_PAGE_404](./../configuration/environment-variables.md#server_error_page_404)) or the `--page50x` ([SERVER_ERROR_PAGE_50X](./../configuration/environment-variables.md#server_error_page_50x)) arguments.
!!! info "Tip"
Either `--page404` and `--page50x` have defaults (optional values) so they can be specified or omitted as required.
Below is an example of how to customize those HTML pages.
```sh
static-web-server \
--port 8787 \
--root ./my-public-dir \
--page404 ./my-page-404.html \
--page50x ./my-page-50x.html
```
## Fallback Page for use with Client Routers
HTML file path that is used for `GET` requests when the requested path doesn't exist. The fallback page is served with a `200` status code, useful when using client routers like `React Router` or similar. If the path is not specified or simply doesn't exist then this feature will not be active.
It can be set with the `SERVER_FALLBACK_PAGE` environment variable or with the CLI argument `--page-fallback`.
```sh
static-web-server \
--port 8787 \
--root ./my-public-dir \
--page-fallback ./my-public-dir/index.html
```
