Converter tools

Convert numbers, encodings and units between the forms people actually use

A converter answers one narrow question: what is this value in another representation? Sometimes that means a number written in binary, hex or octal. Sometimes it is a data-encoding step such as Base64 or URL encoding. Sometimes it is a plain measurement like miles to kilometers or cups to milliliters.

Programmers reach for the encoding and number-base tools when reading network traces, debugging a query string or embedding an image as a data URI. Cooks, travelers, students and engineers use the unit, temperature, angle and paper-size pages. Working through a homework set on scientific notation or fractions is another common use.

Each page is deliberately narrow so the input and output are obvious at a glance. If a value passes through several forms, such as text to ASCII codes to binary, run one converter after another and copy the result across. Check the direction and the base or unit selected before trusting a number, because a swapped setting is the most common cause of a wrong answer.

Common questions

Is Base64 a form of encryption?

No. Base64 only rewrites bytes as printable characters, and anyone can reverse it instantly. Use it to carry binary data through text channels, and use a real encryption tool when the content has to stay secret.

Why do megabytes differ between tools?

Storage vendors use decimal units where a megabyte is one million bytes, while many operating systems use binary units where it is 1,048,576. The data size converter lets you see both so the numbers reconcile.

What does the number base converter accept?

It converts whole numbers between bases such as binary, octal, decimal and hexadecimal. Enter the digits valid for the base you chose, and the other bases update to show the same value written differently.