Overall a pretty safe city with helpful locals :) I personally prefer to avoid parks during the night, at daytime however they are safe! Darmstadt is very walkable and walking around alone at night feels relatively safe, but it always depends on the area of course

I'm usually not walking around alone at night, always with friends, but I do take the tram/ bus late a night sometimes. There are some drunk people occasionally, but nothing ever happened - just sit close to the driver, if you feel unsafe. I would avoid parks at night, especially the Herrengarten, but otherwise I'd say it's really safe. I personally have never had a bad experience. Hope this helps :)

Darmstadt is a very safe place where I feel comfortable to live. Of course here are some crimes too but I think they mostly don't affect tourists. Sometimes things laying around at parties (hausis) get stolen but not often and not with violence. There are also some strange dudes out there but I never heard of someone getting assaulted or anything by strangers in darmstadt.