Features

Random Number Generator is a free online tool for producing random integers, decimals, or unique sequences within custom ranges. Set a lower and upper bound, choose whether duplicates are allowed, pick integer or float precision, and generate one-off values or long lists for raffles, lotteries, statistical sampling, and password digits. All randomness is computed locally in your browser using the Web Crypto API — no server requests, no log trails, and nothing is stored.

When You Need This

Common pain points this tool solves

1. Drawing unique numbers for a workplace raffle, classroom giveaway, or contest and printing or copying the sorted winner list
2. Generating seeded numeric samples for statistical tests, A/B experiment cohorts, or randomized survey orderings
3. Picking strong numeric PINs, passcode digits, or lottery ticket combinations with a cryptographically random source

How to Use

Step-by-step instructions

1. Enter the minimum and maximum values of the numeric range you want to draw from
2. Choose integer or decimal precision, set how many numbers to generate, and toggle 'unique only' if you need no duplicates
3. Optional: sort the output ascending/descending or shuffle it again to randomize the order
4. Copy the list, export as CSV, or copy individual values one by one for your raffle or workflow

Why Choose Korelyy

What makes us better

1. Uses Web Crypto's cryptographically secure randomness by default, not the weaker Math.random(), so PINs, raffles, and security-sensitive draws are unbiased
2. Handles huge lists and ranges up to trillions while still guaranteeing unique results and instant sort/filter operations in-browser
3. Configurable output formats (plain numbers, CSV, JSON) let you drop results directly into Google Sheets, lottery tools, or data pipelines

Monetize With This Tool

Turn this tool into a side income stream

1. Use this tool to speed up your freelance work and take on more paying clients
2. Create polished content faster for your blog, YouTube channel, or social media and grow your audience
3. Offer this tool's capabilities as a service on Fiverr, Upwork, or to your local business clients

Frequently Asked Questions

1. Is this generator cryptographically secure, or does it use the weaker Math.random() PRNG?

   By default it pulls random bytes from the browser's Web Crypto API, which is designed for security-sensitive tasks like key generation. A legacy Math.random() mode is available for simulation work where speed matters more than cryptographic quality, but the default is safe for PINs and raffles.

2. Can I enforce unique draws so numbers never repeat inside a single batch?

   Yes. Enable 'unique only' and the tool will guarantee no duplicates within the requested count, up to the size of the numeric range you configured. It will also warn you before generation if the requested count exceeds the range so you can adjust.

3. Are the numbers I generate ever recorded on your end?

   No. All random sampling, sorting, and formatting happens inside your browser with locally executed JavaScript. No numbers are sent to a server, no logs are written, and no history is kept — even closing the tab clears any ephemeral session state.

4. Can I generate floats / decimals with a fixed number of decimal places?

   Yes. Choose decimal mode and set the precision from 1 to 10 places. The output respects the chosen precision exactly, so you can match grading scales, currency amounts, or lab measurement formats.

5. Can I pick multiple winners at once and share the draw with a team?

   Yes. You can produce a full list of winners, sort or shuffle them, then share the results URL, which encodes the seed, range, and unique setting in the hash so colleagues can verify the same draw is reproducible on their own machine.