18 / random-number-generator
free online tool
Random Number Generator
Generate random numbers within any range instantly.
how to use
- 01
Enter a minimum and maximum value.
- 02
Choose how many numbers to generate.
- 03
Click 'Generate' and copy the results.
about
What is this tool?
Random Number Generator produces random integers or decimals within a specified range. For non-security purposes (games, sampling, picking winners), it uses Math.random(). All generation is instant and local — no server required.
why use this tool
- -Pick random lottery numbers or raffle winners.
- -Generate sample data for testing.
- -Simulate dice rolls or card draws.
- -Works offline in your browser.
features
- -Custom min and max range.
- -Generate multiple numbers at once.
- -Integer or decimal output modes.
- -Copy all results with one click.
comparison
Random Number Use Cases
| Use Case | Range Example | Count | Notes |
|---|---|---|---|
| Lottery numbers (6/45) | 1–45 | 6 | Enable unique mode to avoid duplicates |
| Dice roll (6-sided) | 1–6 | 1 | Classic board game simulation |
| Random sample (100 items) | 1–100 | 10 | Statistical sampling without replacement |
| Test user IDs | 100000–999999 | 50 | Generating mock data for development |
All processing happens entirely in your browser using JavaScript. No files, text, or data are ever sent to a server. Your data stays on your device.
✦ tip from dragontail
When I'm writing test data for Dragontail's apps, I use this tool to generate 20–30 random IDs or values at once, then paste them into my seed scripts. It's far faster than writing a loop, and the randomness feels more 'real' than sequential IDs when testing UI edge cases. For anything security-related, I switch to the Password Generator instead — it uses a proper cryptographic source.
faq
Is this suitable for cryptographic use?
No. This tool uses Math.random(), which is not cryptographically secure. For passwords or security tokens, use the Password Generator tool.
Can I get duplicates?
Yes, by default. Enable 'unique' mode to avoid repeats (subject to the range size).
What is the maximum range?
You can set any min and max values. Very large ranges work fine for integer generation.