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About this tool
Convert between hexadecimal, decimal, and binary formats instantly with color-coded nibble visualization and bit-level breakdown.
The Hexadecimal Converter takes one unsigned whole number in decimal, hexadecimal or binary and returns all three representations at once, plus a nibble-by-nibble breakdown showing each hex digit with its four-bit pattern and decimal value. It accepts anything from 0 up to 4,294,967,295 — the full 32-bit unsigned range — and pads hex output to a whole number of bytes. It is for developers, students and hardware people who need the bit-level view, not just the answer.
Open Hexadecimal Converter on AltFTool — it loads instantly in your browser.
Paste your code or data sample into the workspace.
Pick the format, conversion, or analysis you need.
Copy the polished result straight back into your project.
Every hex digit is broken out with its 4-bit binary and decimal value, so bit positions are visible without counting.
Output is zero-padded to an even number of hex digits, matching how bytes are written in dumps and protocols.
Enter in whichever base you have and get decimal, hex and binary together, each copyable on its own.
Multiply each digit by 16 raised to its position, counting from zero on the right, and add the results. For 0x1F: 1 x 16 = 16, plus F which is 15, giving 31. This tool does the same thing and shows the binary alongside so you can check the bit pattern.
A nibble is four bits — exactly one hexadecimal digit, with a value from 0 to 15. Two nibbles make one byte, which is why hex is the standard way to write bytes: 0xFF is 1111 1111 and equals 255.
4,294,967,295, which is 0xFFFFFFFF or thirty-two 1 bits — the maximum for a 32-bit unsigned integer. Negative values and fractions are rejected; the tool works in whole numbers only.
Because 16 is a power of 2, each hex digit maps to exactly four bits with no carry across digits, so a 32-bit value is always eight hex digits and byte boundaries fall on digit pairs. Decimal has no such alignment, which makes memory addresses, colour codes and bitmasks far harder to read.
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