First of all vs First off

English as a Second Language English Vocabulary, Grammar and Idioms
1

Hi,

Can I use “First of all” and “First off” interchangeably?

Thanks in advance.

2

Almost. “First off” is a little less formal and may indicate you’re a little angry or emotional about the subject you’re talking about.

3

Hi Jamie (K),

Nice to meet you. Thanks a lot for your explanation.

Bye