Webflow's own code export is only available on paid Workspace plans. A Site plan, which is what hosts a published site, does not include it (Webflow Help Center, checked 29 September 2026). A client who pays only for hosting, or a designer on a free Starter Workspace, has no Code export button to press.
NoCodeExport does not need the Webflow project or any Webflow plan. It works from the published URL, so the owner of a site on a Site plan, or a client whose original designer has moved on, can still get the published pages as HTML, CSS and JavaScript.