Independent browser Web Crypto trials
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A hundred-flip sample often looks closer to 50% than a tiny sample, but exactly 50 heads is never guaranteed. The proportion can move toward or away from 50% over parts of a run.
Every coin is sampled independently from the same tested random-bit function. The animation reveals results already selected in your browser and does not influence them.
For repeatable charts, run comparison, and CSV export, use the probability experiment.
A balanced random source makes each side equally likely on each trial; it does not promise an equal split in this particular batch. Repeated outcomes and imbalanced batches are expected parts of random variation. Read the method and limitations before using a result in a dispute.