Concrete floor in garage has large cracks forming.

http://allgaragefloors.com/concrete-floor-repair/

You might want to have a mason come out and check it. Your garage floor shouldn't have large cracks in it.

Hello. There are professionals that you can call who will do that type of work, but if you want to save money and do it yourself here is a guide that will take you through it. If you are a visual learner, you could always go to YouTube where you will find instructional tutorials demonstrating how to fix those concrete cracks. Click on the link below to view the guide. Good luck!

http://allgaragefloors.com/concrete-floor-repair/

Depending how deep the cracks are, you could fill them in. If they're really deep and there's a problem with the grading of the dirt underneath, you might want to call someone who repairs slabs. If there shallow and you are going to try to repair them yourself, here are some products you can look at: https://www.rustoleum.com/search-results/?searchStr=concrete%20repair

This product was recommended to me by a contractor: https://www.3m.com/3M/en_US/company-us/all-3m-products/~/3M-Concrete-Repair-Self-Leveling/?N=5002385+3291192190&rt=rud

I would start with a pro to find out if there is a cause happening thats creating a problem that may grow into more if ignored. If all is found to be structurally sound then take a diy approach to filling cracks. You should be able to get a free estimate/evaluation from a foundation professional. Good luck!

Before you think of fixing the cracks, you need to figure out why the floor is cracking. Fix that, then fix the cracks or more cracks will reappear.