Okay, it seems like this feature does not exist - is there any plan to include it? Or does it exist, and I've just missed something?
Searching around, I've seen this forum post on the topic, but that's almost two years old, so I thought it was worth asking for an update.
(In my case, I realised only after getting 1Password that Linux is not supported - and since I use a Linux machine frequently, I need to export everything and start over. But I'm sure others would also appreciate being able to export from the web UI).
1Password Version: Not Provided
Extension Version: Not Provided
OS Version: Not Provided
Sync Type: Not Provided