Number Base Converter

Convert numbers between Decimal, Binary, Hexadecimal, and Octal bases in real time.

Group digits for readability

Samples:

Decimal (Base 10)

Binary (Base 2)

Hexadecimal (Base 16)

Octal (Base 8)

Features & Conversions:

Supports base prefixes (e.g. typing 0x in hexadecimal, 0b in binary, or 0o in octal).
Arbitrary-precision integers using BigInt (handles very large numbers without overflow).
Supports negative values.
Local-only real-time conversion in your browser. No data is sent to external servers.