Number Base Converter

Binary, octal, decimal, hex & custom base (2–36).

Type an integer in binary, octal, decimal, hex, or any custom base from 2 to 36 — every other base updates instantly. BigInt-safe for huge values. Shows bit length, bytes, scientific notation, and which int type it fits in.

Processes your input on your device without uploading it. Libraries or models may need downloading. No site account is required.