Hex to Binary Converter

A hex to binary converter turns a hexadecimal value into binary, the 0 and 1 code that computers actually use. Hex, short for hexadecimal, uses digits from 0 to 9 and letters from A to F, where A is 10 and F is 15.

The conversion is direct because one hex digit stands for exactly four binary digits, since 16 equals 2 to the power of 4. This tool converts each hex digit to its four bit group and joins them, so you get the full binary value with no rounding and no sign up.

Programmers use hex for colours, memory addresses and byte values, and this converter helps you read those values as binary. Everything runs in your browser, so your value never leaves your device.

Worked example: hex FF to binary

Split FF into its two hex digits: F and F.

Convert each digit to four bits: F is 1111, and the second F is also 1111.

Join the groups in order: 11111111. So FF in hex is 11111111 in binary.

You can check the answer by place value: FF in hex is 255 in decimal, and 128 plus 64 plus 32 plus 16 plus 8 plus 4 plus 2 plus 1 equals 255.

How to Use This Tool

1. Enter a hex value using digits 0 to 9 and letters A to F only.
2. Press Convert to see the binary result and the four bit groups.
3. Copy the result or download it as a text file.
4. Use Load Sample to try FF, which converts to 11111111.

Why Use This Tool

• Exact for long hex values, with no rounding and no sign up.
• Shows the four bit group for each digit, so the answer is easy to verify.
• Rejects letters after F with a plain error message instead of a wrong answer.
• Private by design, since nothing leaves your device.

Common Values

Related Conversions

If you need a different direction, try the Hex to Decimal Converter, Hex to Octal Converter, Binary to Hex Converter and Decimal to Hex Converter. Each one works the same way, in your browser, with the steps shown so you can check the answer.

Frequently Asked Questions