Number Base Converter

Number Base Converter is a free tool that runs entirely in your browser, with no data ever sent to a server. Convert a number between binary, octal, decimal, and hexadecimal.

What it's for

Convert a color code, a memory address, or a computer science exercise between the most common number bases, without manual calculation.

What this tool does not do

This tool only applies the calculation described, with no check on the context of use. No limit is set by the tool itself; the only constraint is your device's memory.

Frequently asked questions

What's the difference with the "text to binary" tool?

This tool converts a number from one base to another (for example, 255 in decimal becomes FF in hexadecimal). The "text to binary" tool converts letters using each character's code, which is different.

Is my data sent to a server?

No: the values you enter are processed entirely in your browser, on your device. They are never transmitted to a server.

Do I need to create an account or install anything?

No: the tool works directly in this page, with no sign-up and nothing to install.