Number Base Converter

Convert numbers between any base (2-36). Binary, hex, octal, decimal, BigInt, Roman numerals, IEEE 754, bit visualization & more.

Ctrl/⌘ + , to toggle options
Saved
Live Convert
Uppercase Hex
Group Digits
Show Bit Info
Signed Mode
Bit Width
Base:
Binary (2)
0
Octal (8)
0
Decimal (10)
0
Hexadecimal (16)
0
0
Bits Needed
0
Bytes
0
Signed
0
Two's Comp
Keyboard Shortcuts
Enter = ConvertCtrl+Shift+C = Copy AllAlt+1-5 = Switch Tab

◆ What it does

Convert numbers between any base from 2 to 36. Supports BigInt, Roman numerals, IEEE 754 float representation, two's complement, and bit-level visualization.

▸ How to use

  • Enter a number and select its base (or use custom 2-36)
  • See instant conversion to all common bases
  • Use the Bit Visualizer to toggle individual bits
  • Convert to/from Roman numerals
  • View IEEE 754 float representation

▸ Why use this

  • Instantly convert between binary, octal, decimal, hex
  • Custom base support from base-2 to base-36
  • BigInt support for arbitrarily large numbers
  • Visualize bit patterns for debugging
  • Roman numeral and IEEE 754 conversions

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