Number Base Converter
Convert numbers between binary, octal, decimal, and hexadecimal.
How to Use Number Base Converter
- 1
Enter a number in any base
Type a number in the binary, octal, decimal, or hexadecimal input field.
- 2
See all bases at once
All four representations update instantly as you type — no need to select a source base.
- 3
Copy the value you need
Click Copy next to any base to copy that representation to your clipboard.
Key Features
Four Number Bases
Convert between binary (base 2), octal (base 8), decimal (base 10), and hexadecimal (base 16) simultaneously.
Bidirectional Input
Type in any field and all other bases update instantly — no need to specify the source format.
Instant Conversion
All conversions happen in real time as you type, with no submit button needed.
One-Click Copy
Copy any base representation to your clipboard with a single click.
Common Use Cases
Programming
Convert between hex, binary, and decimal when working with memory addresses, bitwise operations, or color codes.
Computer Science Studies
Practice and verify number base conversions while studying data representation and computer architecture.
Networking
Convert between decimal, binary, and hexadecimal when working with IP addresses, subnet masks, or MAC addresses.
Embedded Systems
Translate register values and memory addresses between hex, binary, and decimal for microcontroller programming.
Frequently Asked Questions
What number bases are supported?▾
The tool supports binary (base 2), octal (base 8), decimal (base 10), and hexadecimal (base 16) — the four most commonly used number systems in computing.
Can I convert very large numbers?▾
The tool uses JavaScript's BigInt for large numbers, supporting integers with many digits. Floating-point numbers are not supported.
Is hexadecimal case-sensitive?▾
No. The tool accepts both uppercase (A-F) and lowercase (a-f) hexadecimal digits.
Is my data sent to a server?▾
No. All conversions happen entirely in your browser. Nothing is transmitted to any server.