Look closely.
Coin tossing connects simple outcomes with the study of chance. The experiment in this article uses digital randomness from the shared sampler, with the actual source shown after every draw.
Explore hand scale ↗Make a record.
Set a sample size before starting. Record heads and tails in order. Keep the full sequence rather than selecting striking runs.
Make a draw. Keep a record.
Toss independent digital coins.
Coin portrait
The site portrait and Maltese cross are the defaults. Choose a local photo for this page only; it stays in this tab and is not uploaded or saved.
Three coins. Six lines.
Portrait / heads = 3. Maltese cross / tails = 2. Totals: 6 changing yin, 7 stable yang, 8 stable yin, 9 changing yang. The first cast is line 1 at the bottom. This is the three-coin method, with probabilities 1:3:3:1 for 6, 7, 8 and 9. Each action requests one camera sample; Cast all six lines shares that sample across its 18 tosses, with fresh browser randomness for every toss.
How this draw works
The server takes up to 128 KiB of JPEG image data from one fixed stream, with a two-second timeout, and mixes it with fresh system randomness using SHA-512. The browser uses the same source module as the standalone key tool and mixes this response with its own random seed and uses fresh browser random words for each result. Rejection sampling avoids modulo bias. If the sampler is unavailable, results use browser randomness and the status says so.
Samples are experimental: no physical entropy rate has been established. Camera delays and repeated frames are possible. No predictive meaning is assigned to results. History stays in this page and clears when you leave or reset.
Recent draws
Share a photograph or a record.
A photograph, drawing or dated record can be sent privately for a personal reading. Include the procedure and the question.