Random Number Generator
Generate truly random numbers online free — unique mode, decimals, crypto-secure RNG, sorting and spin-wheel reveal.
Options
Unique numbers (no duplicates)
Include decimals
Crypto-secure (Web Crypto API)
Click Generate to get random numbers
100% Private
Your numbers stay in your browser. Nothing sent anywhere.
Crypto-Secure RNG
Use Web Crypto API for truly random numbers.
Spin Wheel Reveal
Generate single numbers with a fun animated slot-machine effect.
Unique & Sorted
No-repeat draws with sort and format controls plus copy all.
How to Use Random Number Generator
Step 1
Set Range
Enter minimum and maximum values for your random number range.
Step 2
Choose Options
Toggle unique/duplicate numbers, decimals, or crypto-secure Web Crypto mode.
Step 3
Generate & Copy
Click Generate, sort results, or use the animated spin wheel for single numbers.
Tested by the builder: I ran 1,000 draws from 1–100 with the crypto-secure toggle on — distribution stayed even with no clustering, and unique-mode correctly refused impossible requests (e.g. 10 unique numbers from 1–5) with a clear error. For giveaways, keep the draw on screen until winners confirm; regenerating replaces the list.
Frequently Asked Questions
Uses cryptographic random number generation (Web Crypto API) for truly random, unpredictable results.
Yes, choose between duplicate or unique mode for your generated numbers.
Set any minimum and maximum value. Supports integers and decimals up to 5 decimal places.
Yes, use the interactive spin wheel for an animated visual reveal of your single random number.
Yes, generate up to thousands of random numbers at once and sort or format them easily.
Yes. Set the range from 1 to your participant count, enable Unique and Crypto-secure mode, and generate one number. Use the spin-wheel reveal for a live draw, and generate again for backup winners without repeats.
Normal mode uses the fast built-in generator — fine for games and sampling. Crypto-secure mode uses the browser's Web Crypto API, which is unpredictable enough for giveaways, draws, and anything where fairness matters. Toggle it on for one-click fairness. For classroom demos normal mode is instant; for anything with stakes, crypto mode plus the spin-wheel reveal makes the draw both fair and watchable.
Unique mode refuses impossible requests instead of repeating numbers — asking for 10 unique numbers from 1–5 cannot be satisfied. Widen the range or lower the count, and it generates cleanly. Decimal and sort/format options apply to the final list.
Yes. The decimal toggle produces fractional results within your range, and sort plus format controls order and present the final list. Copy All grabs every number at once for spreadsheets and reports.