Hexadecimal is a base-16 number system using digits 0-9 and letters A-F. It's commonly used in computing for memory addresses, color codes, and binary data representation.

What does the 0x prefix mean?

The 0x prefix is a standard notation indicating that a number is written in hexadecimal. For example, 0xFF = 255 in decimal.

Hex Converter

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Convert numbers between hexadecimal, decimal, octal, and binary formats. Enter a value in any base and see all conversions instantly.

Input value Input base

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How to use Hex Converter

Enter a number in any of the four fields.
Use prefixes (0x, 0b, 0o) for auto-detection, or select the input base.
The other three fields update automatically.
Copy the value you need.

What is Hex Converter?

This converter supports four number bases: hexadecimal (base 16), decimal (base 10), octal (base 8), and binary (base 2). Enter a value in any field and the others update automatically.

The tool auto-detects input format based on common prefixes: 0x for hex, 0b for binary, 0o for octal. Plain numbers are treated as decimal.

FAQ

What is hexadecimal?: Hexadecimal is a base-16 number system using digits 0-9 and letters A-F. It's commonly used in computing for memory addresses, color codes, and binary data representation.
What does the 0x prefix mean?: The 0x prefix is a standard notation indicating that a number is written in hexadecimal. For example, 0xFF = 255 in decimal.

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Last updated: 2026-05-23

Hex Converter

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