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Random & Decision Tools

Coin Flip

Flip one or many fair virtual coins with customizable outcome labels and actual batch counts.

Your content stays on your device Free, with no account
Coin Flip · local secure drawsNo uploads

Inputs & draw rules

Enter values or load the example. No draw happens automatically.

Draw behavior & limits

1–10,000 independent fair flips, two outcomes each probability1/2. Labels must be distinct,1–40 characters. Finite batches need not be exactly50/50. Preview shows at most20 coins; full outcomes remain in the result/table/reports. New Generate clicks are independent batches.

Secure randomness reuses the existing Security sampler, with no Math.random fallback. Processing limit10seconds. Results are local, not an audited or verifiable public lottery. Source/settings edits invalidate outputs; exporting never redraws.

YOUR DRAW

Result & preview

    A FEW SIMPLE STEPS

    How to use Coin Flip

    1. Enter choices or load the example. List-based tools can import a local UTF-8 text file; review filename/size/status and duplicate/exclusion rules.
    2. Choose draw, grouping or card settings. No-repeat tools show the current remaining ticket pool and offer explicit restoration.
    3. Generate locally and inspect the actual result. The wheel selects once before animation; Reveal now does not redraw.
    4. Copy/download the saved result or reports. Bingo prints/downloads the existing cards. Clear or workflow switching releases local draw state.
    PRIVATE BY DESIGN

    Why use this tool?

    Your lists, participant names, choices and generated results remain in your browser. Self-hosted code uses cryptographic random values and unbiased sampling without uploads, accounts or application input history.

    Tool inputs stay in your browser. Only your theme preference is saved on this device.

    A few things worth knowing

    What rules and limits are used?

    1–10,000 independent fair flips, two outcomes each probability1/2. Labels must be distinct,1–40 characters. Finite batches need not be exactly50/50. Preview shows at most20 coins; full outcomes remain in the result/table/reports. New Generate clicks are independent batches.

    Is this a publicly verifiable lottery?

    No. This is a private browser utility using cryptographic random values with unbiased sampling. Someone controlling their own browser can change inputs or repeat draws. It does not certify an audited lottery or prove fairness to outside observers.

    What happens with repeated labels and repeat draws?

    List-based tools make exact duplicate handling explicit. Separate duplicate tickets can display the same label. Name Picker and Wheel optionally remember ticket IDs until the pool is restored or source/policy/exclusions change. Ordinary generated batches in other tools are independent. No input history persists after page exit.

    Are imports or results uploaded?

    No. Optional UTF-8 text imports are read locally with filename, size and loading/ready/error status. Manual replacement, samples and Clear remove obsolete selections, and failed imports keep previous working text. Copy/download happens only when chosen; those external copies remain outside app cleanup.

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