Random Numbers in a Set Format

Open the page for the format you need, press once and read the number.

Each page here draws a number in one written format and teaches the format with a worked example. The percentage page draws a whole percent, or cuts 100% into 2 to 12 parts that add up exactly.

8 pages

Random Letter and Number GeneratorShort codes of letters and digits, such as B7 or KT482, up to 1,000 at a time with no repeats, to copy and use as labels.
Random Number Generator Decimal PlacesA decimal from any range to 1 to 10 places, such as 7.38, with both ends as likely as every value between them.
Random Hex GeneratorA random hexadecimal number, 2, 4 or 6 digits long.
Random Fraction GeneratorA proper, improper or mixed fraction up to the bottom number you set, with its simplest form, decimal and percent.
Random Percentage GeneratorA random whole percent from 0% to 100%, or 100% split into 2 to 12 random parts that add up exactly.
Random Port GeneratorOne port number from 1024 to 49151 that skips 124 numbers common tools use, with every skipped port listed and explained.
Random Digit Number Generator: 4, 5, 6 or 7 DigitsA random number with exactly the digits you choose: 4 digits to start, or anything from 1 to 12.
Random Binary GeneratorA random byte written as eight bits, with its decimal and hex values, its place-value sum and a table of all 256 bytes.

More about these tools

The fraction page draws a proper, improper or mixed fraction with its simplest form, decimal and percent. The decimal page draws between your own limits at 1 to 10 decimal places. The binary page writes a random byte as eight bits, with its decimal and hex, and the hex page draws two, four or six digits. The digit page draws a number of exactly 4 digits, or any length from 1 to 12, and reads it out in words. The port page draws from 1024 to 49151 and skips the numbers on its list of common services. The letter and number page draws label codes like B7 or KT482 in your own pattern.

All 8 tools

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