About Number Base Converter

Converts numbers between binary (base 2), octal (base 8), decimal (base 10), hexadecimal (base 16), and any custom base from 2 to 36. Binary output is grouped into nibbles (4 bits) for readability and includes bit-width annotations. All conversions happen client-side as you type with instant validation for invalid digits.

• Four primary bases: binary (2), octal (8), decimal (10), hexadecimal (16) — all shown simultaneously
• Custom base input accepts any radix from 2 to 36, using 0–9 and A–Z as digit symbols
• Binary output groups bits into 4-digit nibbles with spaces (e.g. 1111 1111) for readability
• Uppercase hex output (A–F) following the standard convention in assembly and systems programming
• Live validation: entering a digit invalid for the selected base shows a clear error immediately
• Copy button on every output row for fast workflow without manual text selection

Frequently Asked Questions

Why is hex used so often in programming?

Each hexadecimal digit maps exactly to 4 binary bits (a nibble), making it a compact shorthand for binary. Two hex digits represent one byte. Memory addresses, color codes, and bitfields are all more readable in hex than in binary or decimal.

What bases can I use beyond the four presets?

Any base from 2 to 36. Bases above 10 use letters A–Z as additional digits (base 16 uses A–F, base 36 uses A–Z). Base 32 is used in encoding schemes; base 36 can encode large integers compactly using only alphanumeric characters.

How are the binary groups displayed?

Binary digits are grouped into nibbles (4 bits each) separated by spaces, from the right. For example, 255 in binary is shown as "1111 1111" (8-bit) and 65535 as "1111 1111 1111 1111" (16-bit), matching the way binary is written in datasheets and documentation.