“FB timeline cleaner” was a browser plugin that would remove EVERYTHING. Every pic you ever uploaded, every status you ever posted, every comment you left, every like you ever clicked, and every post you’d ever made in a group provided the group is open (or youre still in it / not banned / can see it.)

Caveats: Facebook is always about 2 steps ahead of them, so it’s constantly semi broken and needs multiple script runs to work and that can take hours. It’s best to do one year at a time in the date range instead of “all time,” and then I’ll go help it out by unliking and deleting a couple pages of stuff it missed in between executions. It is a pain in the ass but I “only” had to be patient and then delete maybe 100-200 or so posts and likes versus 5+ years worth.