Number Base Converter

Input - select base then type value

0b1111 1111
0o377
255
0xFF
FF

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Convert any number between binary (base 2), octal (base 8), decimal (base 10), hexadecimal (base 16), and any custom base from 2 to 36. Binary output is grouped into nibbles (4-bit groups) for easy reading. Hex values are shown with 0x prefix, binary with 0b prefix. The ASCII mode lets you type any character and instantly see its decimal, hexadecimal, octal, and binary representations. All base values are shown simultaneously - copy any one with a click. Essential for programmers, computer science students, and digital electronics engineers.

How to Use

  1. 1Choose mode: Multi-Base Converter or ASCII/Character
  2. 2Multi-Base: type a number in any base field - all others update simultaneously
  3. 3Binary is displayed in 4-bit nibble groups for readability
  4. 4ASCII mode: type any character to see its decimal, hex, octal, and binary values
  5. 5Copy individual values using the copy buttons next to each field

Features

  • Simultaneous conversion: Binary, Octal, Decimal, Hexadecimal, Custom base 2–36
  • Binary displayed in 4-bit nibble groups
  • ASCII/Character mode for any character
  • Individual copy buttons per base
  • 0x and 0b prefix notation
  • 100% browser-based

Frequently Asked Questions

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Operations today0 / 3
5 MB max fileNo batch
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