Binary to Hex Converter

How to use the binary to hex converter

1. Select the conversion direction: binary to hexadecimal or hexadecimal to binary.
2. Type or paste your value into the input field. Spaces are ignored automatically.
3. The result updates live as you type. Copy it directly from the output area.

How binary to hex conversion works

Binary (base 2) uses only the digits 0 and 1. Hexadecimal (base 16) uses 0 through 9 plus A through F. Because 16 is exactly 2⁴, every group of four binary digits maps to one hex digit. To convert, pad the binary string on the left with zeros until its length is a multiple of four, then replace each nibble.

For example, the binary string 10101111 splits into 1010 and 1111. The first group equals 10 in decimal, which is A in hex. The second equals 15, which is F. So the result is AF.

The reverse process expands each hex character into exactly four bits. The hex value 3B becomes 0011 for the 3 and 1011 for the B, yielding 00111011. Leading zeros are stripped at the end unless the entire number is zero, leaving 111011.

Nibble reference table

Use this table to look up any four-bit group when converting by hand. Memorizing these sixteen patterns makes reading memory dumps much faster.

Common use cases for hex and binary

Developers encounter both bases constantly. IPv4 addresses are often written in dotted decimal but stored as 32-bit binary values; converting them to hex makes subnet masks easier to read. For instance, 11000000101010000000000100000001 becomes C0A80101.

CSS color codes are another everyday example. The hex triplet #FF5733 represents red 255, green 87, blue 51. In binary that is 11111111 01010111 00110011. When debugging memory dumps or working with low-level protocols, switching between these representations quickly is essential. Hardware engineers also rely on hex to configure registers where each bit controls a specific flag.

Handling large values and edge cases

This binary to hex converter handles arbitrarily long strings because it processes the input character by character rather than parsing it as a single integer. That means a 256-bit hash or a 2048-bit RSA key converts without overflow errors. JavaScript numbers lose precision beyond 53 bits, so string manipulation is the only safe approach for cryptographic data.

Leading zeros are preserved during hex-to-binary conversion: each hex digit always expands to exactly four bits. However, when converting binary to hex, leading zeros beyond the final nibble boundary are dropped so the output stays clean. An input of all zeros returns a single 0. If you need fixed-width output, pad the result manually to the desired byte length.

Related developer tools

If you work with encoded data, you may also need a Base64 encoder for embedding binary assets in text formats. For general-purpose conversions across many bases, try the number base converter. When inspecting raw bytes as readable characters, the binary to text tool translates eight-bit sequences into ASCII or UTF-8.

Structuring data often requires formatting utilities alongside base conversion. Tools like a JSON minifier help compress payloads before encoding them, while an XML validator ensures markup integrity when exchanging configuration files that contain hex attributes.

Worked examples

Each result below was produced by the same code the tool runs, so you can check your own numbers against them.