Binary to Hex Converter
Paste a binary number and get its hexadecimal value instantly — free, private, and fully in your browser.
How to Use the Binary to Hex Converter
- Paste or type your binary number into the input box. Spaces and underscores used as separators are ignored, so 1011_0110 and 1011 0110 both work.
- Choose how the hex should look: keep "Uppercase hex" on for AB12-style output, or turn it off for ab12.
- Enable "Add 0x prefix" when you are pasting the value straight into C, Python, JavaScript, or a register map.
- Click "Convert" to see the hexadecimal result, plus the decimal value when the input is 53 bits or shorter.
- Use "Copy result" to grab the hex string, or "Clear" to start a new conversion.
What Is a Binary to Hex Converter?
A binary to hex converter rewrites a base-2 number in base-16. Because 16 is 2 to the fourth power, every group of four bits maps to exactly one hex digit: 0000 becomes 0, 1010 becomes A, and 1111 becomes F. That clean one-to-four relationship is why engineers read memory dumps, colour codes, and bitmasks in hex instead of squinting at long runs of ones and zeros.
This converter strips whitespace and underscore separators, pads the bit string on the left until its length is a multiple of four, then converts each nibble. Padding on the left is what keeps the value intact — 111 is the same number as 0111, so it converts to 7. Long inputs are handled with BigInt, so a 256-bit key or a full packet dump converts without losing precision.
Working across number bases? Go the other way with the hex to binary converter, turn words into bits with the text to binary converter, or encode strings as hex bytes with the text to hex converter.
Frequently Asked Questions (FAQ)
How do you convert binary to hex by hand?
Split the bit string into groups of four, starting from the right, and pad the leftmost group with zeros if needed. Then replace each group with its hex digit — 0000 to 1111 map to 0 through F.
What is 1010 in hex?
1010 in binary is A in hexadecimal, which is 10 in decimal. Paste it into the converter above and you will see both the hex digit and the decimal value.
Why does binary convert so neatly to hexadecimal?
Sixteen is a power of two (2^4), so four binary digits always encode exactly one hex digit with no remainder. Decimal has no such clean mapping, which is why hex is the preferred shorthand for binary data.
Can this binary to hex calculator handle very long inputs?
Yes. The hex conversion works nibble by nibble, so length is not a limit, and the decimal readout uses BigInt. The decimal line is shown for inputs of 53 bits or fewer to keep the result readable.
What does the 0x prefix mean in hexadecimal?
0x is a marker used by C, Python, JavaScript, and many other languages to say the digits that follow are hexadecimal rather than decimal. Toggle the option above when you want the prefix included in the copied result.
Does the converter accept spaces or underscores between bits?
It does. Separators such as 1011 0110 or 1011_0110 are stripped before conversion, so you can paste formatted bit strings from documentation or source code directly.
Is my binary data uploaded anywhere?
No. The conversion runs entirely in your browser with JavaScript. Nothing you paste is sent to a server, logged, or stored by ToolGenie.
Tips for Converting Binary to Hexadecimal
- Tip 1: Group your bits in fours before you paste them. Reading 1101 0010 rather than 11010010 makes it much easier to spot a typo in the source data.
- Tip 2: Leading zeros never change the value, but they do change the width. Pad to 8, 16, or 32 bits when you need a fixed-size register value rather than the shortest hex string.
- Tip 3: Use the decimal readout as a sanity check. If the number looks nothing like what you expected, the bit order in your source is probably reversed or byte-swapped.
- Tip 4: Round-trip your result through the hex to binary converter to confirm nothing was lost, and reach for the text to hex converter when your starting point is a string rather than a number.