Question 1

Which number bases can I convert?

Accepted Answer

Binary (base 2), octal (base 8), decimal (base 10), and hexadecimal (base 16). Edit any field and the other three update instantly.

Question 2

How large a number can it handle?

Accepted Answer

The converter uses JavaScript BigInt, so it keeps full precision for arbitrarily large integers — no rounding like the regular Number type.

Question 3

What does the bit width setting do?

Accepted Answer

It chooses the register size (8, 16, 32, or 64 bits) used for bitwise operations. Results are masked to that width and shown as a two's-complement bit pattern.

Question 4

What is the difference between signed and unsigned?

Accepted Answer

Unsigned treats the bit pattern as a non-negative value (0 to 2^n − 1). Signed interprets the top bit as a sign using two's-complement, and a signed right shift keeps the sign bit.

Question 5

Is anything sent to a server?

Accepted Answer

No. All conversion and bitwise math runs locally in your browser; nothing is uploaded.

Number Base Converter