Someone sent me some snail calcium tablets i was wondering if this
is safe for my goldfish? if i put it into the tank.

Did they come in the box or container? I have never even heard of them before. Do you have the brand name? I would check the net if you do not have the box. Do a search on the name and I am sure you will be able to find something. Sorry I couldn't be more help to you.

Actually there homemade theres calcium in it.. and i think theres
some fish food in it aswell. The Very nice person who sent them to
me feeds these to her snails. (she comes from applesnail.net)

If they are specially made for snails, I doubt that they would harm your fish at all. People always ask if calcium will hurt their fish, but there hasn't been any incidents with calcium hurting fish... other than when cuttlebone rots and throws off water params.

Oh alright Thanks, at first i was thinking it would change my
water levels.

It may.... Keep an close eye on your fish.

Thanks