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Random generators
How it works
A random integer range is a finite set of equally likely values. Both endpoints are included. Decimal generation samples a fixed grid: from 0.10 to 0.12 with two places, the choices are 0.10, 0.11 and 0.12. It does not sample every real number between them.
What you can do
Generate integers, exact decimal samples, primes, fractions or integer matrices in a chosen range. Palindromes have an exact digit length, no leading zero (except one-digit zero). Independent samples may repeat. Values are independent; these modes do not apply sorting or sampling without replacement.
How to use it
- Select a mode, then enter the minimum, maximum and count. Decimals need a precision. Integers support output bases 2–36. Matrices use rows and columns. For primes, choose a narrow candidate interval. Set replacement and output order, then generate.
- Review the result and notes, then copy or download. Editing any input clears the previous result.
Errors and limits
Up to 30 integer digits, 12 decimal places and 10,000 values. Prime candidates must be in 0–1,000,000,000 and span at most 200,000 integers. Fraction denominators range from 1 to the selected maximum; no-replacement applies to numerators, not reduced fractions.
Palindromes have an exact digit length, no leading zero (except one-digit zero). Independent samples may repeat.
Values are independent; these modes do not apply sorting or sampling without replacement.
Frequently asked questions
Can I generate every value without duplicates?
Yes. Choose without replacement and request the range’s size. For 1–3, requesting three returns a permutation of 1, 2 and 3; requesting four is rejected. For a matrix, the rule covers all cells, rather than restarting on each row.
Are inputs or generated values uploaded?
No. Generation runs in this browser tab. Inputs and results are not added to URLs, uploaded or stored between visits. Copying and downloading happen only when requested. Your browser clipboard and saved files can remain after you leave.