Free Binary to Hex Converter

What Is a Binary to Hex Converter?

Quick answer: A binary to hex converter rewrites base 2 numbers (0s and 1s) as hexadecimal, base 16, written with the digits 0 to 9 and a to f. Paste one number or a list, press Convert to Hex, and each group comes back as hex. Try it with your own binary.

Every four bits (one nibble) make exactly one hexadecimal digit, so base 2 to base 16 needs no arithmetic. That is why a memory address, MAC address, color code or checksum is usually written in hex in debugging and networking: it is the same bits at a quarter of the length. The tool takes unsigned bits and returns a lowercase hex string.

How to Use the Binary to Hex Converter

1. Add your bits. Paste into the box labeled Enter or paste your Binary, with a space or line break between numbers. Or press Upload File and pick a .txt file.
2. Press Convert to Hex. A Result card appears.
3. Copy the result. Use Copy to Clipboard or Save as TXT.

A space or line break always starts a new number, so write 11110000 for f0; 1111 0000 gives f 0. Guests can convert up to 100 numbers per run and a free account up to 1,000.

Binary to Hex Examples

Each row was checked against Python. Paste a row and compare.

In row four, 16 is hex, not decimal. The last row is the IPv4 address 192.168.1.1 as four bytes; leading zeros survive. A color channel in an RGB to hex value is also one byte.

How to Convert Binary to Hex by Hand

Group bits in fours, right to left (a four-bit group is a nibble), pad with leading zeros if the leftmost group is short, then replace each group with its digit. The nibbles 0000 to 1001 are the digits 0 to 9. After that the letters take over: 1010 is a, 1011 is b, 1100 is c, 1101 is d, 1110 is e and 1111 is f.

Try 1010011101. The groups are 1101, 1001 and a short 10 that pads to 0010, which reads 2, 9, d, so the answer is 29d. Group 10110 from the left and it becomes 1011 0, which reads b0 instead of the correct 16.

The shortcut works because 16 is 2 to the 4th power, so place value runs in powers of two. To check a result in code, run format(int(bits, 2), 'x') with Python's int() function, or paste it into the converter.

What the Converter Does and Does Not Do

Each nibble is looked up in a 16-entry table, so no number is ever parsed as a float and a 16-, 32- or 64-bit pattern stays exact. In our tests, 64 ones returned ffffffffffffffff and a 200,000 digit group returned 50,000 hex digits in under a second in our tests. An 8-bit group always gives two digits, so 00001010 is 0a.

Negative numbers, fractions and a binary point are rejected. The output is always lowercase with no 0x prefix, and the page shows no working steps. In JavaScript, toString loses precision past 53 bits.

Fix the 'Input is not valid Binary' Message

One bad character in any group stops the whole run. Nothing is half converted.

• Stray characters. A 2 as in 1012, a trailing b, a sign or a pasted hex letter all trigger it.
• Prefixes and separators. Remove 0b and turn separators such as commas into spaces.

Limits and Files

Upload File takes one .txt file, and a PDF is refused. Typed text wins over a file, so clear the box first. One request holds up to 200,000 characters.

Related Number Converters

• Hex to Binary Converter: the reverse.
• Binary to Decimal Converter: base 10 result.
• Decimal to Hex Converter: base 10 to hex.
• Decimal to Binary Converter: base 10 to bits.
• Binary to Text Converter: bits to characters.
• Text to Binary Converter: characters to bits.
• Binary to ASCII Converter: ASCII text.
• hex and binary by hand: worked examples.