Skip to content
TRULLZ

Free Number Base Converter

Binary, octal, decimal, hex and custom.

Base 2(binary)11111111
Base 8(octal)377
Base 16(hex)FF
73
Ad space · tool-below

How to use the Number Base Converter

  1. 1Enter a number.
  2. 2See binary, octal, decimal, hex at once.
  3. 3Or set a custom base.

Features

  • Bases 2–36
  • All-at-once display
  • Bit grouping

Frequently Asked Questions

What is 0xFF in decimal?

255 — one byte’s maximum value.

Related Tools

Text to Binary

Encode text as binary (UTF-8) code.

Text

ASCII Table

Interactive ASCII reference with decimal, hex, binary.

Text

Char Code Converter

Text ↔ char codes (decimal, hex, Unicode).

Text

Fraction Calculator

Add, subtract, multiply, divide fractions.

Calculators

About the Number Base Converter

Convert numbers between bases 2–36 with simultaneous display of common bases. The Number Base Converter runs entirely in your browser — your data is processed locally and never uploaded to a server. Explore more Converters tools or browse all free online tools.