Random Number Generator — Pick a Custom Range
Generate a random integer in any range you choose — 1 to 100, 1 to 10, or any custom min/max. Free, instant, client-side random number generator, no sign-up.
🔒 100% Client-Side Processing
Your data is processed entirely in your browser and never transmitted to any server.
Common Use Cases
Picking contest winners
Number your entrants and generate a random integer to select a winner transparently.
Sampling data
Generate random row numbers or IDs to spot-check records in a large dataset without bias.
Creating test values
Produce arbitrary numeric inputs for boundary testing forms, calculators, and validation logic.
Frequently Asked Questions
- What range does the random number cover?
- Whatever min and max you set — the default is 1 to 100, but you can pick any range, including 1 to 10, 1 to 1,000, or negative numbers. Every generated integer is inclusive of both endpoints and uniformly distributed within the range.
- Is this suitable for cryptographic use?
- No — Math.random() is not cryptographically secure. It is perfect for sampling, games, and test data, but for security tokens use the Secure Password Generator or Random String tools, which use crypto.getRandomValues().
- What happens if I set min higher than max?
- The tool swaps them automatically, so 100 as min and 1 as max behaves exactly the same as 1 and 100 — you never get an error for entering the range backwards.
- Is my data private when I use this tool?
- Yes. This tool runs entirely in your browser using client-side JavaScript — nothing you type is transmitted to, logged by, or stored on any server. You can safely process confidential text, tokens, or code.