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The .gov means it’s official.
Federal government websites often end in .gov or .mil. Before sharing sensitive information, make sure you’re on a federal government site.


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The https:// ensures that you are connecting to the official website and that any information you provide is encrypted and transmitted securely.

Builds and Previews

Site previews

Every branch in a Federalist-enabled GitHub repo is built by Federalist with a site preview.

Site preview links will auto-generate within pull requests. To see them, scroll to the bottom of your pull request and click “show all checks”, then click on “details” to the right of the Federalist check. The site preview is only available after a build reports completion, usually within a few minutes.

Federalist preview screenshot

You can also find links to site previews in the “GitHub Branches” page after logging into Federalist.


For security reasons, site previews are unavailable with pull requests from forked repositories.

There can be two “special” branches, which are specified in the web UI’s Basic Settings page as the Live Site Branch and/or the Demo Site Branch. Those branches can be built with custom domains (that’s really the only way they’re special).

Here’s how the URLs work: