Flip a coin
Heads or tails, decided when you tap Flip.
Tap Flip for a new result
Recent flips
Your last flips will line up here. Nothing is chosen until you flip.
Each tap is a new pseudorandom draw via crypto.getRandomValues. This is not atmospheric noise. Methodology
About this page
ChanceKit opens on a coin because a two-sided choice is the fastest way to settle a tie. Press Flip and the page draws heads or tails in this browser. The coin graphic turns to the side that was just chosen. It does not arrive with a side already selected, and refreshing does not continue a hidden streak from a server. The strip under the button keeps the last few results from this visit so a group can see what already happened. Those earlier flips do not change the next one. If you need several flips, a best-of series, or a different kind of pick, the chips under the coin jump to the matching tool. This is an entertainment and classroom utility, not a betting product.
Other tools on the desk
Dice covers a single face count or a small tray of mixed dice. The wheel takes a list you can edit and stores it on this device. Yes or no is the same two-outcome idea as the coin, with labels you can rename. The number tool draws an inclusive integer between a minimum and a maximum.
A classroom or a kitchen table
Call on a row, pick who goes first, or break a tie without debating the method. Say the rule out loud before you tap, then let the result stand. If someone needs to leave the pool, take them off the wheel or ignore a later flip. The tool will not remember a roster after you clear site data.
Questions
Is this coin flip fair?
Heads and tails are one inclusive draw from two outcomes. The draw uses crypto.getRandomValues in your browser, then rejection sampling so the leftover remainder of a 32-bit value cannot favor the low end. ChanceKit does not claim atmospheric noise, hardware entropy you can audit from this page, or a casino-style provably fair setup. Read the methodology before you use a result for anything that matters. A fair physical coin can still be biased by the way you catch it. This page only claims an even digital mapping, not a model of a metal coin in the air.
Does the history strip change the next flip?
No. The strip is a list of results already shown in this visit. Each Flip click asks for a new random value and maps it on its own. A run of heads does not make tails due. If you want a series with a winner, use the dedicated coin page and pick best of 3, 5, or 7, which still starts from fresh draws.
Can a class use the coin without accounts?
Yes. There is no login. The flip runs locally, so a shared projector only needs the page open. Agree on the question first, then tap once. For picking a student from a roster, the classroom spinner is a better fit because a coin only has two labels. For a yes/no question with custom words, use the yes or no page.
Why not atmospheric noise?
Services that sample physical noise can be the right tool for lab work that needs a public entropy source. ChanceKit is a fast utility: the entropy comes from the browser's Web Crypto generator, which is a cryptographically strong pseudorandom generator, not a microphone or a radio. The methodology page says that plainly and points to random.org if you specifically want a true-random service.
How do I share what just landed?
After a flip, Copy result puts the outcome and this page's address on the clipboard. Share uses the device share sheet when the browser offers one, and otherwise copies the same text. The link opens the tool. It does not replay the exact flip, because the next person should get a new draw.
Is ChanceKit a gambling site?
No. There is no wager, no balance, no odds board, and no claim that a pattern of flips predicts anything. Use it for games, classroom turns, and low-stakes choices. Do not use it to pick lottery numbers, place bets, or generate secrets. The terms page states the same limit.