Base Number Converter

Convert numbers between binary, octal, decimal, and hexadecimal bases instantly.

From Base

Number

Binary (BIN) (2)

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Octal (OCT) (8)

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Hexadecimal (HEX) (16)

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JavaScript Examples

Binary Operations & Bit Manipulation

Common binary operations in JavaScript for flag handling and permissions

// Working with binary flags
const READ_PERMISSION    = 0b100  // 4
const WRITE_PERMISSION   = 0b010  // 2
const EXECUTE_PERMISSION = 0b001  // 1

// Combining flags using bitwise OR
let userPermissions = READ_PERMISSION | WRITE_PERMISSION // 0b110 (6)

// Checking permissions using bitwise AND
const canRead = (userPermissions & READ_PERMISSION) !== 0    // true
const canExecute = (userPermissions & EXECUTE_PERMISSION) === 0 // false

// Toggle permission using XOR
userPermissions = userPermissions ^ EXECUTE_PERMISSION // Add execute
console.log(userPermissions.toString(2)) // '111'

// Practical example: RGB color channels
const red = 0b11111111   // 255
const green = 0b10101010 // 170
const blue = 0b00000000  // 0
console.log(`rgb(${red}, ${green}, ${blue})`) // "rgb(255, 170, 0)"

How to Use Our Base Number Converter

Select BaseChoose the base of your input number (Binary, Octal, Decimal, or Hexadecimal).
Enter NumberType your number in the input field. The converter will validate it automatically.
View ResultsSee instant conversions to all other number bases.
Copy ResultsClick the copy button next to any result to copy it to your clipboard.