Best website for estimating German language level

[GeorgieWorgie]

I need to improve my German proficiency level for my job (C1 would be ideal).

I have no idea where I am right now. I speak German every day but never learnt it formally.

Can anyone recommend a free website where I can test my skill level somewhat accurately?

Test your German - Goethe-Institut https://share.google/OALdcyey4twQSv6rR

Would this be any good? The Goethe-Institut is well known.

Most courses will test you when you register. C1 is being able to write without looking up every word and making very few grammar mistakes. I still need formal reports proof reading though. For me, speaking is being able to have client meetings, talk random shit in the pub with friends, and answer an unexpected phone call, all without making a fool of myself.

Thanks @Paaseitjes @prairiegirl81

I‘ll check out that link.

I speak German at work and with friends, and in general every day life. I feel confident and comfortable speaking, but I know I make mistakes.

My biggest problem is that I struggle with der/die/das and when to use den instead of die/ deiner instead of deine etc. I just haven’t learnt it and it makes no sense to me. So I could write a good text but those details would be wrong and would bring my score down