https://digitalheir.github.io/lastfm-to-librefm-exporter/
A Last.fm exporter as a web app, requiring no installation. You can use this software to back up your scrobble history from Last.fm or backup your scrobble history from Libre.fm.
This program is modeled loosely after the program lastscrape-gui. The difference is that for lastscrape-gui you have to install Python and the Qt framework on your machine, and you might not want to take this effort. This app works directly from the browser.
Precautions are roughly the same as described in this reddit post under the section "Backing up from last.fm to libre.fm":
Before you proceed now, make sure that you have disabled automatic scrobbling from libre.fm to last.fm (it's off by default). You don't want the tracks you scrobble from last.fm now to return and re-register in last.fm while importing them to libre.fm.
- Go to the web page
- Fill in your details for Last.fm and Libre.fm. Press buttons for creating tokens and session keys where applicable.
- Either sync your Last.fm "Recently listened" to Libre.fm, or export your scrobbled tracks to JSON. The web page should work straight-forwardly.
- If you encounter any problems, leave an issue.