I'm joking vs Just kidding vs Kidding

When to use each in English, with meaning, register, and examples.

I'm joking

InformalTop 2,000 (common)

Just kidding

InformalTop 2,000 (common)

Kidding

InformalTop 2,000 (common)
 I'm jokingJust kiddingKidding
Pronunciation🇬🇧 //aɪm ˈdʒoʊ.kɪŋ//🇺🇸 //aɪm ˈdʒoʊ.kɪŋ//🇬🇧 //dʒʌst ˈkɪdɪŋ//🇺🇸 //dʒʌst ˈkɪdɪŋ//🇬🇧 //ˈkɪd.ɪŋ//🇺🇸 //ˈkɪd.ɪŋ//
MeaningI am not serious; I am saying something funny.I didn't mean what I just said.Joking or not serious.
ExampleI can't believe you thought I was serious! I’m joking.I really thought you were serious about that! Oh wait, you were just kidding.I was just kidding when I said you owe me money.
RegisterInformalInformalInformal
How commonTop 2,000 (common)Top 2,000 (common)Top 2,000 (common)
Collocationsmake a joke, lighten the mood, playfully teasing, not serious, tell a jokejust kidding around, just kidding, right?, don't take it seriouslyjust kidding, are you kidding?, kidding around
Antonyms-seriously, no joke, for real, honestlyserious, truthful
Common mistakesUsed too seriously when it's meant to be light-hearted., Confused with 'I'm serious' which has the opposite meaning.Using in formal situations., Confusing with 'just joking'., Overusing can make it sound insincere.Using 'kidding' in a serious context., Confusing 'kidding' with 'kid' as a noun., Not understanding when to use it to indicate sarcasm.
Usage notesUsed casually in conversations to lighten the mood after a serious statement. Avoid in formal settings.Used to lighten the mood after a serious or surprising statement. Best for casual conversations; avoid in formal contexts.Use 'kidding' in casual conversations. It's not suitable for formal contexts. Often used to lighten a statement or clarify a joke.

See it in real clips

I'm joking
Just kidding
Kidding

Frequently asked questions: I'm joking vs Just kidding vs Kidding

What's the difference between I'm joking, Just kidding, and Kidding?

I'm joking: I am not serious; I am saying something funny. Just kidding: I didn't mean what I just said. Kidding: Joking or not serious.

Can you show an example of each?

I'm joking: I can't believe you thought I was serious! I’m joking. Just kidding: I really thought you were serious about that! Oh wait, you were just kidding. Kidding: I was just kidding when I said you owe me money.

Can I use I'm joking, Just kidding, and Kidding interchangeably?

Not always. I'm joking, Just kidding, and Kidding are related and overlap in some contexts, but they differ in register, how common they are, and usage, so swapping one for another can change the meaning or tone. Check the differences above before substituting.