Version 1.0.0 of my MastoPurge app has been released today! MastoPurge is a command line tool written in Golang, which allows you to easily mass-delete posts from your Mastodon account. You can define a maximum post age for your account. Older posts will then be removed in the next step.
Unfortunately due to API rate limits this process can take a long time for hundreds or thousands of old posts, but this is much better than manually deleting every single post from the past
I came up with this idea some time ago because I wanted to have auto-expiring posts on Mastodon, but this feature is not offered yet :-/ MastoPurge is my (temporary?) solution for everyone who wants to clean up his/her Mastodon space!
Have a look at: GitHub - ThomasLeister/mastopurge: Purges Mastodon accounts. Removes posts. Makes things clean again.
Demo screencast: MastoPurge v1.0.0 demo