Use our Number tools to generate random numbers, calculate next leap year, or perform bitwise operations.
Perform bit-shift operation on a hexadecimal, decimal, octal and binary number.
Convert between bytes, kilo bytes, mega bytes, giga bytes and tera bytes.
Determine time required to download a specific file given the bandwidth speed.
Convert a decimal number to Binary or Hexadecimal, or vice versa.
Generate pseudo-random numbers in sequence as if you're throwing a dice.
Check if a particular year is a leap year, or determine leap years from a range.
Date Calculator will calculate duration between dates, or add/subtract days.
Convert a Gregorian calendar date to the Lunar (Chinese) calendar date.
Let us generate your pseudo-random lottery numbers for your next lucky tickets.
We've put together a collection of domain, network and webmaster tools for developers and netizens. The tools are offered for ethical use only, and use of the tools to harm others are strictly prohibited. All available tools are free to use. You're welcome your suggestions and feedback on the tools we offer.
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