Frequently Asked Questions

Yes. All our tools use the browser's built-in crypto.getRandomValues() function, which is a cryptographically secure pseudorandom number generator (CSPRNG). This is the same randomness used to generate encryption keys and security tokens. It is far more unpredictable and unbiased than Math.random(), making it suitable for raffles, giveaways, and any situation where fairness matters.

Absolutely. Our random list picker is specifically designed for raffles and giveaways. Because it uses cryptographically secure randomness, every participant has a genuinely equal chance of winning. The algorithm cannot be gamed or predicted, and results are generated entirely in your browser — we never see your data.

The list shuffler uses the Fisher-Yates (Knuth) shuffle algorithm, which guarantees that every possible ordering of your list is equally likely. Combined with cryptographically secure random numbers from crypto.getRandomValues(), this produces a genuinely unbiased shuffle every time.

No. All randomness generation happens entirely in your browser using JavaScript. Your numbers, lists, and results never leave your device. We do not have a backend server, database, or any mechanism to collect or store your data.

Math.random() is a basic pseudorandom number generator not designed for cryptographic security. It can exhibit subtle statistical biases and its output can be predicted by an adversary in some circumstances. crypto.getRandomValues() is designed to be indistinguishable from true randomness and is audited by browser security teams. For raffles and fair decision-making, this matters.

There is no hard limit. However, for the number generator, if you disable duplicates, the quantity cannot exceed the range (e.g., you cannot generate 11 unique numbers between 1 and 10). For the list picker, you can paste thousands of items — performance depends on your device.