Number Base Converter

Convert numbers between binary, octal, decimal and hexadecimal.

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About the Number Base Converter

Convert integers between binary (base 2), octal (base 8), decimal (base 10) and hexadecimal (base 16) — type in any box and the other three update live.

A staple for programmers, networking students and anyone working with low-level data, permissions or color codes.

How to use the Number Base Converter

  1. Type a number in any of the four boxes.
  2. The other bases update instantly.
  3. Copy the representation you need.

Common uses

Reading hex color and memory values Converting file permission octals Computer science homework

Frequently asked questions

Why is hexadecimal so common in computing?
One hex digit represents exactly 4 bits, so bytes are neat two-digit values — far more compact than binary.
Does it handle large numbers?
Yes — conversion uses BigInt, so numbers far beyond 2⁵³ stay exact.

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