そんなことしない

don't do such a thing

→ そんな
phrase Uncommon #16,079
don't do such a thing A casual way to say that someone does not or would not do something like that. The subject is often omitted and understood from context.
JA: 私はそんなことしないよ。
EN: I wouldn't do such a thing.

そんなことしない

I wouldn't do something like that.

— 映画 聲の形 (2016)

そんなことしない

I would never do something like that.

哀れなスメアゴルそんなことしない

Poor Smeagol, don't do that.

— ロード・オブ・ザ・リング/王の帰還 (2003)

トム絶対にそんなことしない

Tom would never do such a thing.

本当はそんなことしないけどね

I wouldn't really do something like that, though.

— エブリシング・エブリウェア・オール・アット・ワンス (2022)

あなたはそんなことしない確信しています

I’m sure you wouldn’t do something like that.

— お嬢さん (2016)

本当の友達ならそんなことしないだろ

If they were a true friend, they wouldn’t do something like that.

誰もわざわざそんなことしない

No one would go out of their way to do something like that.

お前はそんなことしないはずだ

You wouldn’t do something like that.

本当のカナダ人絶対そんなことしないだろう

A true Canadian would never do such a thing.

今時の子そんなことしない

Kids these days don't do that.

そんなことしない方がいいって

I'm telling you, you shouldn't do that.

トムお前はそんなことしないよな

Tom, you wouldn't do something like that, would you?

そんなことしないって約束するよ

I promise I won't do anything like that.