A base-16 number system: digits 0–9 then A–F (where A=10 through F=15). Programmers use it because each hex digit is exactly 4 binary bits — two hex digits make one byte.

Why do web colours use hex?

A colour like #FF6A3D is three bytes — red, green, blue — written as six hex digits. It is compact, exact, and every browser and design tool understands it.

Can I include the 0x or # prefix?

Yes. Both are stripped before conversion, so 0xFF, #FF and FF all mean the same thing here.

How do I convert hex to decimal by hand?

Multiply each digit by its place value — powers of 16 — and add. For example, 0x2A = 2×16 + 10 = 42.

Hex Converter

Paste a hexadecimal number — get its decimal and binary forms. Paste a hex colour and get its RGB values with a live preview.

Hexadecimal number or colour (0x and # prefixes are fine)

Hexadecimal	—
Decimal	—
Binary	—

How to use it

Paste your hex — a number like 2A or a colour like #FF6A3D.

Read the conversions — decimal and binary appear instantly.

See the colour when your hex is six digits: the swatch shows exactly what that code looks like.

Hex is everywhere once you look

Memory addresses, colour codes, Unicode points, network packets, error codes — hexadecimal is the notation technical work runs on, because it is binary you can actually read. Two hex digits are one byte; that is why colours are six digits (three bytes: red, green, blue) and why "0x" prefixes mark numbers as hex in code. This converter handles the number side and the colour side together, so the abstract digit-string becomes something you can see.

Hex Converter

How to use it

Hex is everywhere once you look

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