lfm.xiffy.nl is a small personal project that brings back the RSS feeds Last.fm removed years ago. You give it a Last.fm username, and it gives you URLs for recent tracks, loved tracks, top artists, and more. There's no account to create, no payment asked, and no personal data stored beyond what you type into the form.
For that kind of lightweight, zero-commitment service, the site checks the important boxes: it uses a valid HTTPS certificate, stays off blacklists, and has clear privacy and terms pages. The creator, @xiffy, has been running this since at least 2016 according to the site copy, which is a decent track record for a hobby project.
The main caveat is that you won't find a contact form or email address on the homepage. But given that the tool is free and doesn't ask for anything sensitive, that's a minor oversight rather than a warning sign. If you're just looking to get your Last.fm listening data into an RSS reader, lfm.xiffy.nl does what it promises without any hidden catches.