Hexadecimal to Binary Converter
Convert hexadecimal (base-16) numbers to binary (base-2).
Try an example:
- Binary (2)
11111111- Octal (8)
377- Decimal (10)
255- Hexadecimal (16)
ff
Converting Hexadecimal to Binary
Each hex digit expands to exactly four binary bits, so converting is a quick per-digit lookup.
How to convert Hexadecimal to Binary by hand
- Replace each hex digit with its 4-bit binary equivalent (0 = 0000 … F = 1111).
- Concatenate the groups in order.
- Optionally drop any leading zeros.
Worked example
FF (hex) → 11111111 (binary) — F = 1111 and F = 1111.
More converters
- Decimal to Binary
- Binary to Decimal
- Decimal to Hexadecimal
- Hexadecimal to Decimal
- Binary to Hexadecimal
- Decimal to Octal
Frequently asked questions
How do I convert Hexadecimal to Binary?
Replace each hex digit with its 4-bit binary equivalent (0 = 0000 … F = 1111). Concatenate the groups in order. Optionally drop any leading zeros. Or just use the converter on this page — it does it instantly. Example: FF (hex) becomes 11111111 (binary).
What is FF (hex) in binary?
FF (hex) converts to 11111111 (binary). F = 1111 and F = 1111.
Is this converter free and private?
Yes — it is free and unlimited, and the conversion runs entirely in your browser, so nothing is uploaded to a server.