This tool allows you to take an .1pux export file of 1Password 8 & convert it to a JSON file importable by Bitwarden.
It has only been tested on Linux by me, but nothing suggests it shouldn't work on macOS & Windows too.
Usage of ./1password-linux-to-bitwarden:
-1pass-backup-file-path string
The absolute path (location) of a 1Password .1pux backup file
-bitwarden-export-file-path string
The absolute path to where you want to export the JSON to import into Bitwarden (defaults to your current working directory)