Examples:

• Don't listen to me, I'm just kidding.
• This is the Fortingall Yew—no, I'm just kidding—this is the Fortingall Yew.
• I'm just kidding.
• I'm just kidding when I say things like that.
• Don't give me that look. I'm just kidding.
• I'm not being serious; I'm just kidding.
• Don't talk to me like that! - Lighten up, will you! I'm just kidding.
• You don't want me to come to your party? - I'm just kidding. I want to see you there.