Number Base Converter Online
Use this free online Number Base Converter tool to convert numbers between decimal, binary, octal, and hexadecimal. Type in any field to update all bases instantly.
How it works & FAQ
Why this is secure?
Number base conversion runs in your browser's JavaScript engine. No data is sent to any server.
Step-by-Step Guide
- 1Enter a number in the input field.
- 2Select the source base: binary (2), octal (8), decimal (10), or hexadecimal (16).
- 3The equivalent values in all other bases are displayed instantly.
Frequently Asked Questions (FAQ)
Which number bases are supported?
Binary (base 2), octal (base 8), decimal (base 10), and hexadecimal (base 16) are all supported in any conversion direction.
What's the maximum number size?
The tool uses JavaScript's BigInt for large number support, allowing conversion of very large numbers beyond the standard 64-bit integer limit.
Can I convert negative numbers?
The tool currently supports positive integers. For negative binary, two's complement representation varies by bit width.
All conversion runs in your browser. No data is transmitted.