Number Base Converter

🔢 Number Base Converter

Convert between Binary, Octal, Decimal and Hexadecimal.

Enter Number Input Base

About the Number Base Converter

The Number Base Converter converts numbers between binary, octal, decimal and hexadecimal — essential for programming, networking and computer science study.

Enter a value in one base and see it in all the others.

How to use it

Enter a number and its base.
Read the value in binary, octal, decimal and hex.
Copy the base you need.

Every tool on SEOKeyMaster is 100% free, works right in your browser, and requires no signup or API key. Your data never leaves your device.

Frequently Asked Questions

What is hexadecimal used for? ▼

Colours, memory addresses and compact representation of binary data.

Can it convert large numbers? ▼

Yes, within standard number precision.