Random number generator
Random number generator

What Random number generator does
The RapidTables random number generator produces pseudo-random numbers in both integer and decimal formats. Users define a minimum and maximum range, a step value, and a list length to create single values or batches of numbers suitable for simulations, academic work, or quality assurance. The output appears immediately on screen, and each result can be copied, shared, or saved locally. The interface includes preset quick-links for common ranges like 1-6 or 1-100, but also supports custom boundaries. A distribution graph visualizes occurrence frequency across generated values, helping users assess uniformity. The service runs cryptographically secure pseudorandom algorithms locally in the browser using HTTPS, and numbers are not transmitted to the server. Additional tools on the site include a password generator and various calculators, all accessible from the same navigation hub.
How to use the RapidTables Random number generator
- 1
Open the Random number generator page on RapidTables
- 2
Set the Minimum and Maximum values to define your desired range
- 3
Choose Step and List length to control the spacing and number of outputs
- 4
Select a List delimiter (Comma, Space, or New line) for the format of the result
- 5
Click Generate to produce the numbers, then Copy or Save as needed
Best for
Ideal for students, educators, and developers who need quick, customizable random values for simulations, games, or statistical exercises without installing software.
Limitations
- Results are pseudo-random, not truly random
- No unit conversion or domain-specific scaling available
- Distribution graph is unnormalized and best viewed with large list lengths
Random number generator FAQ
- Can I generate truly random numbers on RapidTables?
- No, the tool uses a cryptographically secure pseudorandom number generator that runs locally in your browser; the output is sufficient for most simulations and games but not for high-security cryptographic purposes.
- What is the maximum list length I can generate?
- The generator supports list lengths of up to 16,384 numbers in a single run, after which the interface may slow depending on your browser.
- Are the generated numbers sent to RapidTables' servers?
- No, all random number generation happens locally within your browser; the numbers never leave your device.
- Can I generate decimal numbers between specific values?
- Yes, the tool allows you to set a minimum and maximum range and will output floating-point decimals within those boundaries, with a configurable step value to control precision.
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