Question 1

Which shuffle algorithm is used?

Accepted Answer

The default is Fisher-Yates (also known as the Knuth shuffle), an unbiased O(n) algorithm where every permutation is equally likely. We also simulate riffle, Hindu and overhand shuffles that mimic real-life deck shuffling, useful for games and magic tricks.

Question 2

Is this deck shuffler truly random?

Accepted Answer

It uses your browser's crypto-strong random source for unbiased results. For card games, poker nights or classroom use, the shuffle is statistically indistinguishable from a physical shuffle.

Question 3

Can I deal cards to multiple players?

Accepted Answer

Yes. Click the Deal button to reveal cards one at a time. The remaining deck order is always visible in the right panel so you can pause and resume.

Question 4

Can I shuffle multiple decks together?

Accepted Answer

Yes. Use the deck count option (1–8 decks) to combine multiple 52-card decks into one shoe — perfect for blackjack or baccarat.