True Random Number Generator

Need a fast random number for work, study, or play. This tool generates cryptographically secure values right in your browser. It now supports lists of many numbers and clean decimals. No fuss, just precise results.

What this tool does

This true random number generator creates values using the Web Cryptography Application Programming Interface Web Crypto API. Your device supplies high quality entropy, and the tool converts it into numbers within your chosen range. Each value stands on its own and follows a uniform spread across that range.

A hardware true random number generator uses physical noise. This tool uses secure system randomness through your browser.

How to use this tool

1. Enter the minimum value.
2. Enter the maximum value.
3. Set how many numbers to create from 1 to 1000.
4. Choose decimal places from 0 to 10.
5. Select Generate Random Numbers.
6. Press Enter for a quick repeat.

You now see your results. For one value, you see a single number. For many values, you see a list with summary stats.

Input fields explained

• Minimum value: The lowest number you allow. Use integers or decimals, including negatives.
• Maximum value: The highest number you allow. Set this higher than the minimum.
• How many numbers: The count of results to create. Range 1 to 1000.
• Decimal places: The precision of each result. Range 0 to 10. Use 0 for whole numbers.

What the output means

Single result: You see one random number formatted to your decimal setting.

Multiple results: You see a list of numbers. Below the list you see:

• Average: The mean of the generated numbers.
• Sum: The total of all results.
• Min generated: The smallest result in the list.
• Max generated: The largest result in the list.

All results fall within your range after rounding to your chosen precision.

Notes and limits

• The tool runs in your browser using the Web Crypto API.
• Older browsers lack this feature and cannot create values.
• Set the minimum lower than the maximum.
• Use a count between 1 and 1000.
• Use decimal places from 0 to 10.
• Rounding can land on the exact maximum in some cases.
• Repeats can appear in any random list.
• The list keeps the original order. Sorting does not happen.
• For key creation and gambling, prefer specialist tools and guidance.

Why use this true random number generator

• Cryptographic strength randomness from your device.
• Works with integers and decimals.
• Generates a single value or a large list fast.
• Clear stats for quick checks.
• No server steps, just local generation.

Common use cases

• Pick a winner from a small range.
• Create sample data for tests or demos.
• Simulate dice, cards, or spins with fair ranges.
• Split users into test groups with simple ranges.
• Produce random offsets, delays, or seeds for models.
• Generate study problems with varied inputs.

Example settings

• Roll a die: Min 1, Max 6, Count 1, Decimals 0.
• Pick lottery style numbers: Min 1, Max 49, Count 6, Decimals 0.
• Random price for testing: Min 10, Max 99, Count 20, Decimals 2.
• Sensor noise simulation: Min -1, Max 1, Count 100, Decimals 4.
• Classroom quiz numbers: Min 100, Max 999, Count 30, Decimals 0.

Get the most from the tool

• Pick decimals that match the task. Money often needs two decimals.
• Use more numbers for smoother averages in tests.
• Set a tight range for small steps, or a wide range for broad spread.
• Press Enter to refresh results during live demos.
• Copy results into a sheet for later checks.

Frequently asked questions

Is this a true random number generator

People search for a true random number generator. This tool uses secure system randomness via the Web Crypto API.

Are results fair across the range

Each value follows a uniform spread across your range before rounding.

Can I use negative numbers

Yes, enter negative values for minimum or maximum when you need them.

Can I get integers only

Yes, set decimal places to zero.

How do I make a big list

Set the count from 2 to 1000, then generate and review the stats.

How do I regenerate fast

Adjust any field, then press Enter.

What if I need strict non repeating results

Use a separate dedup step in your workflow, or pick a smaller count.

That is it. Clean inputs, clear output, strong randomness. Use it with confidence for your next task.