Radix & base converter — integers in bases 2–36
Paste an integer in any base from 2 to 36 and see binary, octal, decimal, hexadecimal, and a custom target base. Supports 0x/0b/0o prefixes, underscores, and arbitrary-precision BigInt math — all local.
Frequently asked questions
No. Parsing and conversion use BigInt math in this tab only. Nothing is sent to LocalTools servers for processing.
Each digit must be valid for the source base you selected—letters A–Z are only allowed when the input base is 11 or higher. Switch the input base to match your literal (for example base 16 for 0xFF).