Environment Variables

If your site talks to external services — a form endpoint, an analytics key, a CMS token — put those values in the Config panel’s Env tab (the ⚙ icon in the left rail) instead of hardcoding them.

Managing variables

The panel lists every variable in the project. Add a key and value, edit inline, or remove with ✕ — then Save. Values are masked; use the ◎ toggle to reveal one.

Two rules worth knowing:

Keys starting with PUBLIC_ are visible to code running in the browser. Everything else is only available at build time — safe for secrets your pages read while building.
After saving, restart the dev server (Stop/Start dev in the top bar) so the preview picks up the change.

What happens on publish

Publishing builds your site with the current values — they’re baked into the published output. Changed a value? Just republish.