Convert BINARY to HEX, Free
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How to convert BINARY to HEX
Binary and hexadecimal are both ways of representing the same numeric values, just with different bases. Binary uses base 2 (digits 0 and 1); hexadecimal uses base 16 (digits 0-9 and A-F). Hex is favored by programmers because each hex digit maps exactly to four binary bits, making it far more compact to read and write. A byte that takes 8 binary digits (e.g., 11011010) collapses to just two hex digits (DA). This converter handles the mapping instantly in your browser using pure JavaScript arithmetic.
The conversion works by grouping your binary string into 4-bit chunks from the right, then replacing each group with its hex equivalent: 0000 = 0, 0001 = 1, ... 1010 = A, 1011 = B, 1100 = C, 1101 = D, 1110 = E, 1111 = F. For example, 11011010 splits into 1101 (D) and 1010 (A), giving hex DA. If your input length is not a multiple of 4, the tool zero-pads on the left automatically.
Enter your binary string
Paste or type your binary number (e.g., 10110101). Spaces between bytes are accepted and ignored during conversion.
See the hex output immediately
The hexadecimal equivalent appears as you type. No conversion button is needed.
Copy the result
Click the copy icon to grab the hex string for use in your code, debugger, or documentation.
Reverse if needed
Switch to hex-to-binary mode on the same page to convert in the other direction.
Frequently asked questions
How does binary to hex conversion work?
Group the binary string into 4-bit segments from the right, then replace each group with its hex digit: 0000=0, 0001=1, ... 1010=A, 1011=B, 1100=C, 1101=D, 1110=E, 1111=F.
Why does hex need fewer digits than binary for the same value?
Hex uses base 16, so each digit holds 4 bits of information. Binary uses base 2, so each digit holds 1 bit. A 32-bit number takes 32 binary digits but only 8 hex digits.
What if my binary string length is not a multiple of 4?
The converter automatically pads the leftmost group with leading zeros. For example, 101 is treated as 0101, which maps to hex 5.
Can I convert binary to uppercase and lowercase hex?
By convention hex letters are shown uppercase (A-F). Lowercase (a-f) is equally valid and both are accepted by compilers, debuggers, and most parsers.
Is this useful for reading memory dumps?
Absolutely. Memory dumps, packet captures, and CPU register values are almost always displayed in hex because it is far more readable than raw binary strings.