Hex to Binary Converter

How to Convert Hex to Binary

Converting hexadecimal to binary takes 3 steps:

1. Enter your hex value in the HEX Input field — e.g. 3A, FF, or 0x1A.
2. Click “HEX to Binary” — the binary equivalent appears instantly in the output field.
3. Copy the result with one click. Use “Swap” to reverse (binary → hex).

Quick examples: 3A → 0011 1010  |  FF → 1111 1111  |  1A → 0001 1010

Hex to Binary Conversion Table (0–F)

Each hex digit maps to exactly 4 binary bits (one nibble). Use this table as a quick reference:

How Hex to Binary Conversion Works

What Is Hexadecimal (Base 16)?

Hexadecimal (base 16) is a number system using 16 symbols: digits 0–9 and letters A–F. It is widely used in computing to represent binary data more compactly — one hex digit equals exactly 4 binary bits (one nibble). Developers use hex for memory addresses, HTML color codes (#FFFFFF), byte-level data, and machine instructions.

What Is Binary (Base 2)?

Binary (base 2) is the fundamental language of computers, using only 0 and 1. Every piece of data — text, images, programs — is ultimately stored as binary. Eight binary digits form one byte, which can represent values from 0 (00000000) to 255 (11111111).

The Conversion Formula

To convert hex to binary manually: replace each hex digit with its 4-bit binary equivalent from the table above and concatenate the groups.

Example 1: Convert 3A (hex) to binary
  3  →  0011
  A  →  1010
  Result: 0011 1010

Example 2: Convert FF (hex) to binary
  F  →  1111
  F  →  1111
  Result: 1111 1111  (= 255 decimal)

Example 3: Convert 1A (hex) to binary
  1  →  0001
  A  →  1010
  Result: 0001 1010  (= 26 decimal)

Common Hex Values in Binary — Quick Reference

When Do Developers Use Hex to Binary Conversion?

• Bit manipulation: Checking or setting individual bits in a register value expressed in hex
• Debugging: Reading memory dumps, error codes, and machine instructions in binary form
• Networking: Analysing MAC addresses, IPv6 addresses, and subnet masks
• Electronics: Configuring microcontroller registers, GPIO pins, and FPGA logic
• Computer science education: Learning number systems and the relationship between base 16 and base 2

Related Binary Converters

If you need to convert in a different direction or format, try these related tools:

• Binary to Hex Converter — reverse this conversion
• Decimal to Binary Converter — convert base 10 to binary
• Binary to Decimal Converter — decode binary to a number
• ASCII to Binary Converter — convert text characters to binary

100% Client-Side Privacy

All hex-to-binary conversions happen locally inside your browser. No data is sent to any server. Your hex values, converted binary strings, and all intermediate results stay entirely on your device.