What does だって mean in Japanese?

だって means but,because,even,also,too.

What JLPT level is だって?

だって is a JLPT N3 vocabulary word.

but,because,even,also,too

だって (datte) is a JLPT N3 vocabulary word meaning “but,because,even,also,too”.

だってお隣となりさんだし。ちょくちょくお邪魔じゃまするから。

Well, we're neighbours. I'll be popping over all the time.

彼は歌もうまいが、ギターだって同じくらい上手だ。

His singing is very good, but he plays the guitar just as well.

そこらへんは、男子と女子とでは違うんだってば。

Obviously that's different for men and women.

iPhoneはインターネットにとって死神なんだって。

Apparently "the iPhone sounds the death knell for the Internet."