Substack Archive Button (All Domains)

Adds Archive and Unarchive buttons to Substack post pages, including publications on custom domains.

The extension adds Archive and Unarchive controls directly to Substack post pages for logged-in users, including publications hosted on custom domains, so you can manage your reading archive without leaving the page. When you open a Substack post, the extension adds: - On desktop: An Archive or Unarchive item to the post actions menu - On mobile: An Archive button in the action bar. Archiving or unarchiving happens through the Substack API endpoint, using your existing Substack session. A brief confirmation message appears after the action. The extension activates only on post pages where the Save or Unsave control is present and stays dormant on unrelated sites. It does not collect, store, or transmit personal data. It supports Substack-owned domains and Substack publications hosted on custom domains.