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Binary, Hex, Decimal Converter

Convert numbers between different bases (binary, octal, decimal, hex).

Enter a number

Input base:

Decimal (Base 10)

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Binary (Base 2)

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Octal (Base 8)

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Hexadecimal (Base 16)

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Binary (base 2): used in bitwise operations, networking (subnet masks), and low-level programming
Octal (base 8): used in Unix file permissions (e.g. chmod 755)
Hexadecimal (base 16): used in memory addresses, color codes, and byte representation
Conversion updates live as you type — no button click needed

How to use Number Base Converter

1
Select input base — Choose whether your number is decimal, binary, octal, or hex.
2
Type your number — All four representations update instantly as you type.
3
Copy any result — Click the Copy button on any card to copy that representation.
4
Use quick examples — Click any preset to load a common value instantly.

Number Base Converter runs entirely in your browser — no data is sent anywhere.