All the casinos recommended in the replies above are reputable casinos. There is no such thing as a completely safe online website, be it a casino, exchange, wallet..
Take your time to read the announcement threads on this section then make up your own mind. You are the only one who can tell which is the best casino based on your own preferences.
Having your own research can be a big help on where to play, the giver sites are ok and it’s up to OP if he will follow it or still looking for other option. It’s good to gamble with the best site to avoid being scam, but of course you need to gamble only the money you can afford to lose and if you think the site is worth the risk, then enjoy gambling there.