Fair Giveaways, Raffles & Classroom Cold-Calling
Assign numbered tickets or spreadsheet rows (e.g. 1 to 450), set Count to 5, and turn on 'No repeats' to draw 5 distinct giveaway winners fairly.
Random Number Generator
Draw unbiased, cryptographically random integers within any custom minimum and maximum range. Whether you are running a fair giveaway raffle, selecting random sample rows for an audit, rolling tabletop RPG dice, or generating test datasets, you can draw 1 to 1,000 numbers at once — with an optional 'No repeats' mode so every drawn number is unique.
How to Use the Random Number Generator
- 1
Enter your Minimum (lowest possible integer) and Maximum (highest possible integer) values.
- 2
Specify how many numbers you want to draw at once (from 1 up to 1,000).
- 3
Check 'No repeats (unique)' if you are running a raffle, lottery, or random sample where the same number cannot be picked twice.
- 4
Click Generate to draw fresh numbers using browser cryptographic entropy, then copy the results.
Practical Use Cases
Random Sampling for Financial & Quality Audits
Generate an unbiased random sample of 50 invoice IDs or survey respondents out of a population of 10,000 for compliance testing.
Generating Mock Datasets & Tabletop Rolls
Quickly generate arrays of random integers for unit tests, sorting algorithm benchmarks, or multi-dice rolls.
Random Number Generator Features
Single or Bulk Draw (Up to 1,000)
Draw one winning number or generate a list of 1,000 random integers in one click.
Unique Raffle Mode (No Repeats)
Guarantees that no number appears more than once in the generated batch.
Cryptographic Random Source
Draws entropy from the browser's Web Crypto API for unbiased uniform distribution.
Runs 100% in your browser
Nothing is uploaded to a remote server, so your data and files stay strictly on your device.
Free and unlimited
No account registration, no watermarks, and no daily usage caps.
Mobile and desktop ready
Responsive layouts and comfortable touch controls that fit phones, tablets, and desktops.
Technical Specifications & Best Practices
- ✓Both the Minimum and Maximum boundary integers are inclusive (e.g. a range of 1 to 10 can draw both 1 and 10).
- ✓When 'No repeats' is checked, the range size (`Max - Min + 1`) must be at least as large as the quantity of numbers requested.
- ✓Uses `window.crypto.getRandomValues()` rather than biased `Math.random()` for fair draws.
- ✓Generates up to 1,000 integers per click locally in your browser.