しなくても

even if (you) don't do it, without doing it

→ 為る
し do + なく Negative + て Te-form (conjunctive form) + も additive/focus particle
verb · informal Uncommon #18,631
even if (you) don't do it, without doing it Often followed by いい to say that something does not need to be done.
JA: 今日は運動しなくてもいいよ。
EN: You don't have to exercise today.
Conjugation of 為る

彼はこのことをしなくてもよい。

He doesn't have to do this.

乱暴なことをしなくてもその問題は解決できる。

That problem can be solved without resorting to violence.

トムは普段、月曜日の午後は仕事をしなくてもいい。

Tom usually doesn't have to work on Monday afternoons.

化粧しなくてもきれいだよ。

You look beautiful even without makeup.

浮気しなくても殺される

I'll be killed even if I don't cheat.

— グッドフェローズ (1990)

独りで食事しなくてもご自由に

You don’t have to eat alone—feel free to join us.

— ビッグ・シック ぼくたちの大いなる目ざめ (2017)

ここまでしなくても許せ

You don’t have to go this far for me to forgive you.

— ダンガル きっと、つよくなる (2016)

今日しなくてもいいよ。

You don't have to do it today.

そう心配しなくてもいいよ。

You don’t need to worry so much.

彼が賛成してもしなくてもかまわない。

It doesn’t matter whether he agrees or not.

そこまでしなくても大丈夫よ

You don't have to go that far.

— マルホランド・ドライブ (2001)