Question 1

How do I convert decimal to binary?

Accepted Answer

Select "Decimal (base 10)" as your input base, type your number (e.g. 255), and the binary equivalent appears instantly. For 255: it converts to 11111111 in binary (eight 1-bits = 2^8 - 1).

Question 2

What is hexadecimal and why do programmers use it?

Accepted Answer

Hexadecimal (base 16) uses digits 0-9 and letters A-F. Each hex digit represents exactly 4 bits (one nibble), making it compact and readable for binary data. 0xFF = 11111111 in binary = 255 in decimal. CSS colors, memory addresses, and byte values are commonly written in hex.

Question 3

How do I convert text to binary?

Accepted Answer

Switch to "Text ↔ Binary" mode and type your text. Each character is converted to its 8-bit ASCII code. For example, "A" (decimal 65) becomes 01000001 in binary. Spaces separate each character's binary representation.

Question 4

What is the interactive bit editor?

Accepted Answer

Below the conversions, the bit editor shows your number as individual bit blocks. Click any bit to toggle it between 0 and 1. The decimal, hex, and binary values update instantly. This is useful for understanding how individual bits affect the overall value.

Question 5

What bitwise operations are supported?

Accepted Answer

AND, OR, XOR, NOT, left shift (<<), and right shift (>>). Enter two operands (A and B), select the operation, and see the result in decimal, binary, and hex. NOT operates on operand A only, inverting all bits. Shift operations move bits left or right by B positions.

Question 6

What does 0xFF mean?

Accepted Answer

0xFF is hexadecimal notation for the value 255. The 0x prefix indicates hexadecimal. FF = 15×16 + 15 = 255 in decimal, and 11111111 in binary (all eight bits set to 1). It represents the maximum value of an 8-bit unsigned integer (one byte).

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