Most of the time you want a coin flip you just want the answer, and any coin flip site will do. The moment the flip decides something between two people, the site stops being enough — because one of you flipped it and the other one is looking at a screenshot.
Give the two sides real names, flip it, and send the link. The result is baked into the link before it is shared, so both of you watch the same coin land the same way.
Name the sides
Heads and tails are fine, but the coin does not have to be a coin. Put in the two restaurants, the two names, the two options, or the two people. The winning side is announced by name, which removes the extra step where you have to remember which of you was heads.
A weighted coin, on purpose
Turn on Weighted odds and the coin stops being 50/50. Give one side more lottery balls and it wins proportionally more often. The ball counts are shown afterwards, so a rigged coin is a rigged coin everyone agreed to.
When to use a race instead
A coin flip only handles two options. If you have three or more things to choose between, or you want the full ranked order rather than a single winner, run a race or a rumble instead — same idea, up to 30 competitors.
How it works
Name both sides
Heads and tails, or the two things you're deciding.
Flip it
One chunky spinning coin, done in a second.
Send the link
It lands the same way for whoever opens it.
Questions
Is the coin flip a true 50/50?
Yes, unless you switch on Weighted odds. With equal lottery balls each side has exactly the same chance.
Can I flip a coin between two names instead of heads and tails?
Yes. Type the two names in and the winning side is announced by name.
Will the same link always give the same result?
Yes. That is the point of the link — everyone who opens it sees the identical flip.
Do I need an account?
No. Coin Flip is free and needs no sign-up.