Number Randomizer

Enter a range of numbers (like 1-49) or a list of numbers to randomize (like 10 20 30 40 50). You can also mix ranges and list (like 1-10, 90-100). You can also add alphanumeric lists or words (like a,b,c or apple, orange, banana). If you have a range with negative numbers, you can enter it using a ':' (like -1000:-100). To generate a non-repeating sequence, generate same amount of numbers as present in the range. (e.g. 10 numbers from 1-10 will produce a shuffled sequence from 1-10)

Select Uniqueness and Order

For lottery numbers like Powerball: Uncheck "Order Matters" and check "Unique". For lottery numbers like Pick3: Check "Order Matters" and uncheck "Unique". For pin codes, passwords, etc: Check "Order Matters" and uncheck "Unique". For no repeats: Check "Unique". For numbers with replacement: Uncheck "Unique". If numbers to be generated per line are more than the numbers available in the range, the random number generator will automatically switch to allow numbers with replacement (i.e. duplicates)

Select Odd / Even

Select Format

This advanced random number generator lets you specify various options to tune the random numbers to your liking. The numbers generated are cryptographically strong (see Cryptographically secure numbers) numbers generated using the javascript Window.crypto method. The numbers are generated locally in the browser and do not travel across any networks and are not sourced from any single hardware device. On top of using the entropy provided by the window.crypto method (which is small enough to produce cryptographically strong random numbers), it utilizes another algorithm to minimize the entropy per machine even further.