If you are running your website then you know how it is important to you. You can check ranking manually but it become harder when you have above 50 keywords, so subscribe premium tools but they cost much.
So, below are some tools which are totally free in limited features and you can check your mostly keywords.
It is launched recently, so they are offering more in free pack. You can add up to 10 websites and check 50 keywords per website.
In total, you check 500 keywords and even you can automate the process and check local serp.
Mostly search engines are available without any restrictions. If you refer someone then you get premium features.