Is it wellcome or welcome?

Welcome with one “l” is the correct spelling in phrases like you’re welcome, where it functions as an adjective. This word can also be a noun that means “a greeting during someone’s arrival” or a verb that means “to greet someone in a polite way.”

Welcome in a sentence examples
You are quite welcome for the gift.

When we entered the cafe, the barista greeted us with a warm welcome.

On my first day at my new job, my manager welcomed me to the team and took me to lunch.

QuillBot’s free Grammar Checker can help you spell words like “welcome” correctly in your writing.