- Go to your Facebook account on a PC.
- Head to https://www.facebook.com/messages/t/ to access your desktop Messenger app.
- Locate the convo you intend to archive among the names of accounts you have messaged on the left-hand side of the display.
- Click the gear-shaped icon that will be visible close to a name when you hover over it.
- Choose “Archive” from the dropdown menu to archive a convo.