冗談だよ

just kidding

→ 冗談
phrase Uncommon #16,499
just kidding A casual way to clarify that what was just said was a joke. The よ adds emphasis; 冗談じゃねえよ is a rougher expression meaning “I'm not kidding.”
JA: 今のは冗談だよ。
EN: I was just kidding.

冗談だよ

Just kidding.

— ANORA アノーラ (2024)

冗談だよ

Just kidding!

— 善き人のためのソナタ (2006)

冗談だよ雑用仕事は見つかった

Just kidding. Did you find any odd jobs?

— 道 (1954)

冗談だよ

You're joking, right?

何の冗談だよ

What kind of joke is that?

— バトル・ロワイアル (2000)

冗談だよなんで怒ってるんだ

I was just joking. Why are you mad?

— 道 (1954)

もちろん冗談だよ

Of course, I'm just kidding.

冗談だよ

Just kidding.

それは単なる冗談だよ

It’s just a joke.

冗談だよ面白い

— Just kidding. — Is it funny?

— ダーク・プレイス (2015)