Coin Flip, Dice Roller & Random Picker Community
Questions, answers and tips from people who use the Coin Flip, Dice Roller & Random Picker. True-random coin flips, dice (d4–d100), yes/no decisions and a list picker.
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From the tool guide: common questions about Coin Flip, Dice Roller & Random Picker
The items below are not posts by community members. They come from the written guide for this tool and are here to get a conversation started. Use “Ask a follow-up” to open a thread about any of them.
Is it truly random?
It uses the browser's cryptographic random number generator (crypto.getRandomValues) with rejection sampling, so all outcomes are equally likely.
From the tool guide Ask a follow-upCan I flip many coins at once?
Yes — 1, 2, 3, 5, 10 or 100. The result shows the number of heads and tails.
From the tool guide Ask a follow-upHow do I roll a d20 with a modifier?
Choose 1 die, 20 sides and set the modifier, for example +5.
From the tool guide Ask a follow-upDoes the list picker remember items?
No. Nothing is stored; it works entirely in your browser.
From the tool guide Ask a follow-upWhy did I get five heads in a row?
Streaks are normal in random sequences; every flip is independent of the last.
From the tool guide Ask a follow-upIs it suitable for a prize draw?
It is fair, but for official draws you may need a witnessed or auditable process.
From the tool guide Ask a follow-upWhat this tool does
Settle a decision, run a tabletop game or pick a winner with results that are genuinely fair. The coin flip animates a real coin and tracks heads and tails, the current streak and the running percentage; flip one coin or up to 100 at once. The dice roller handles any number of dice from one to ten with 4, 6, 8, 10, 12, 20 or 100 sides, adds a modifier such as +3 for tabletop role-playing games, and keeps a history of recent rolls.
How to use it, step by step
- Choose Coin flip, Dice roller or Yes/No & list picker.
- Set how many coins or dice and the sides.
- Press Flip, Roll or Pick.
- Read the result, totals and history.
Tips from the guide
- Use “Don't repeat” to work through a whole list fairly.
- Flip many coins at once to see the law of large numbers.
- Keep the modifier at 0 unless your game uses one.
- For prize draws, screen-record the result if you need proof.
Common mistakes to avoid
- Believing a streak means the next flip is “due” — every flip is independent.
- Using a fake-random tool with bias for a fair draw.
- Forgetting that the modifier is added once, not per die.
Who uses it
- Gamers and game masters. Roll d20s and damage dice quickly.
- Teachers and parents. Fair choices for classrooms and families.
- Anyone deciding. Break ties and choose between options.
How to ask a question people can answer
A good thread on the Coin Flip, Dice Roller & Random Picker saves everyone time. Start with a title that names the exact problem, such as the input you used, the result you expected and the result you got. A title like “Not working” is hard to answer, while a title with the specifics gets replies quickly.
- Say what you tried. List the steps you followed and any settings you changed, so replies do not repeat what you already did.
- Share a small example. A short sample input and the output you saw is worth more than a long description. Remove anything private first.
- Mention your setup. Your device, browser and whether you are on a phone or a computer can explain many odd results.
- One question per thread. Separate topics get clearer answers and are easier to find later with the search box above.
- Come back and reply. If a suggestion worked, say so and upvote it, and if you found the fix yourself, post it for the next person.
Community rules
Be kind, stay on topic and keep personal data out of your posts. Do not post adult, hateful or illegal content, advertising or repeated links. Every post is shown with its author’s username and date, and posts that break these rules can be hidden by moderators. This space is for help with the Coin Flip, Dice Roller & Random Picker and related tasks, and it is separate from the sitewide discussion forum where broader topics live.