Tool Web

Base Converter

Select a number and its input base to convert it to binary, octal, decimal, and hexadecimal at once. Handy for development and computer study — all calculations happen inside your browser.

Enter a number to see the result.

How to use

  1. Choose the base of the number you enter (decimal, binary, octal, or hexadecimal).
  2. Enter the number to convert.
  3. The binary, octal, decimal, and hexadecimal values are shown in real time.

Frequently asked questions

Which bases can I convert?

It converts between binary, octal, decimal, and hexadecimal. Choose the base of your input and it converts to the other bases at once.

Is hexadecimal shown in uppercase?

Hexadecimal is shown in uppercase (A–F). Input is case-insensitive.

Are the values I enter sent to a server?

No. All calculations happen only inside your browser, and the values you enter are never sent to or stored on any server.