Number Base Converter

When would I use this?

The same number can be written in several styles — the everyday kind, plus the special counting systems computers and programmers use. A manual, error message, or settings file might show a value like 0xFF where you'd expect a normal number.

Type what you've got into the matching box and every other version appears instantly, so you can see what the plain number is (or go the other way). Nothing you type leaves your computer.