Free · No account · No limits
Drop in. Get numbers. Done.
Generate random numbers fast — four distributions, reproducible seeds, batch jobs, and CSV export. Everything runs in your browser.
Four distributions
Uniform, normal, exponential, and Poisson — with the parameters that matter exposed.
Reproducible seeds
Same seed, same numbers, every time. Share a seed and someone else gets your exact run.
Batch jobs
Queue dozens of configs at once and download the combined results as one CSV.
Saved presets
Keep the setups you use constantly — a d20 roll, a 1,000-sample normal — one click away.
Questions people actually ask
Are these numbers truly random?
They're pseudo-random. Unseeded runs use your browser's Math.random; seeded runs use a mulberry32 generator so results are repeatable. Neither is suitable for cryptography or anything involving money.
How many numbers can I generate?
Up to 100,000 per run. The screen shows the first 100 to stay responsive — download the CSV for the whole set.
Does my data leave the browser?
Generation happens client-side. Only presets and batch jobs touch the server, and only when you save one.
Can I use this from code?
Yes — POST /api/generate takes the same config the form builds. See the README for the full endpoint list.
Ready when you are.
No sign-up, no paywall, no cookie banner.