Random Number Generator
Pick random numbers in a range
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Random Number Generator
Pick random numbers in a range
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About this tool
Generate random integers or decimals within any range, with counts, uniqueness and instant statistics.
The BrainCoder Random Number Generator produces cryptographically secure random numbers within any specified range. Whether you need a single random integer, a set of unique lottery numbers, or a floating-point value between two decimals, this tool provides truly random results using your browser's Crypto API.
Unlike Math.random() which uses a predictable pseudorandom algorithm, our generator uses crypto.getRandomValues() which sources entropy from the operating system's hardware events, mouse movements, and other unpredictable sources. This makes the results suitable for security-sensitive applications like token generation, sampling, and games where fairness matters.
Configure the minimum and maximum range, choose between integers and decimals, and generate as many numbers as you need in a single batch. All numbers are generated locally and never transmitted. The tool also prevents duplicates if you need unique values within a range.
Key features
Everything you get with Random Number Generator — no premium upsell.
Cryptographically secure random generation
Integer and decimal number modes
Configurable min/max range
Batch generation up to 100 numbers
Unique-only mode to prevent duplicates
Uses crypto.getRandomValues() for true randomness
How to use Random Number Generator
Follow the steps below to use the tool.
- 1
Set the range
Enter minimum and maximum values to define the range for your random numbers. Integers or decimals are both supported.
- 2
Choose number type
Select 'Integer' for whole numbers or 'Decimal' for floating-point values with configurable decimal places.
- 3
Set quantity
Specify how many random numbers you want to generate. Toggle 'Unique only' if you need non-repeating values.
- 4
Generate and copy
Click 'Generate' to produce the random numbers. Copy individual values or all results at once.
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Launch Random Number GeneratorFrequently asked questions
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