Archiving a Redmine project moves inactive work out of normal project lists while keeping its issues, wiki pages, files, and history in the application. It fits completed, paused, or retired projects that should stop appearing to regular users but may need administrator recovery later.
Redmine performs the archive action from the administrator Projects list. The list starts with active projects, and the status filter can be changed to archived after the action to confirm where the project moved.
An archive is different from deletion or closing. Deleted projects remove data, closed projects remain visible but read-only, and archived projects are hidden from users without reducing database or file storage. Archiving a parent project also archives its subprojects.
Related: How to create a Redmine project
Related: How to back up and restore Redmine
The administrator project list shows active projects by default.

Archiving a parent project also archives its subprojects. The action hides project content from users but does not reclaim database or attachment storage.
The archived row appears gray in the administrator list. Administrators can use the row Actions menu later to unarchive the project.
