じゃないよね

isn't it?

→ だ
phrase Uncommon #11,959
isn't it? An informal way to seek agreement or confirmation. Depending on context, it can also mean "surely not" or "isn't ...", especially when expressing surprise or disbelief.
JA: 今日は休みじゃないよね?
EN: Today isn't a day off, is it?

本当じゃないよね

It's not true, is it?

じゃないよね

It’s not me, right?

— バトル・ロワイアル (2000)

まさかチョコレート嫌いじゃないよね

You don't happen to dislike chocolate, do you?

大丈夫じゃないよね

You're not okay, are you?

— 人生スイッチ (2014)

トムってテニスそんな上手じゃないよね

Tom isn't that good at tennis, is he?

まだ車を運転できるじゃないよね

You’re not old enough to drive yet, are you?

トムキッチンじゃないよね

Tom isn't in the kitchen, right?

トムってほんと恥ずかしがり屋じゃないよね

Tom isn't really shy, is he?

あなたの名前はトムじゃないよね

Your name isn't Tom, is it?

宮部でもそれは優しさじゃないよね

(Miyabe) But that's not kindness, is it?

— 万引き家族 (2018)

そんなに驚くことじゃないよね

It’s not really that surprising, is it?

君たち家出じゃないよね

You two… you’re not running away from home, are you?

— 天気の子 (2019)

あなたこの辺のじゃないよね

You’re not from around here, are you?

犯人仲間じゃないよね

You're not one of the culprit's accomplices, are you?

— バトル・ロワイアル (2000)

それってフェアじゃないよね

That's not fair, is it?

トムってさもうそれをやるような年齢じゃないよね

Tom’s not really at the age to be doing that anymore, is he?