Skip to content
littlekit.app
All tools

Number base converter

Convert exact whole numbers between bases 2–36 with live binary, octal, decimal, and hexadecimal comparisons.

Exact whole-number conversion

Base 16

FF

Bases 2–36 · up to 4,096 digits · negative integers supported. Enter digits without 0x/0b prefixes, commas, or decimal points.

Processed on your device

How it works & useful details

How to use this tool

Enter an integer and its source base. Choose a common-base card, set any target base from 2–36, or swap the bases.

Details and limits

Uses exact integer arithmetic rather than floating-point approximations. Negative numbers are supported. Digits are case-insensitive; letters A–Z represent 10–35. Prefixes such as 0x, separators, and fractional parts are not accepted.

Up to 4,096 input digits. Output is a signed magnitude representation, not fixed-width two’s complement.