じゃないわよ

it's not

→ だ
phrase Rare #21,533
it's not An emphatic way to say “it's not” or “isn't,” with わよ adding emphasis. Traditionally associated with feminine speech, though usage varies by speaker and context.
JA: それは私のせいじゃないわよ。
EN: It's not my fault.

だけど生まれたのは赤ん坊の責任じゃないわよ

But being born isn't the baby's fault.

— 生きる (1952)

あなたの仕事じゃないわよ

Your job isn’t easy, you know.

私の目は節穴じゃないわよ

My eyes aren't just for show, you know.

トムと一緒じゃないわよ

I'm not with Tom.

あなたが思ってるほど大変じゃないわよ

It's not as difficult as you think.

マックあの坊や考えじゃないわよ

Mac, that wasn't the boy's idea.

— JUNO/ジュノ (2007)

あなたはまだ運転免許取れるじゃないわよ

You're not old enough to get a driver's license yet.

退屈な優しい人退屈じゃないわよ

A boring person plus a kind person equals someone who isn’t boring.

— アバウト・タイム ~愛おしい時間について~ (2013)

あんただけじゃないわよ

You're not the only one.

— 万引き家族 (2018)