Number Base Converter
Convert numbers between binary, octal, decimal, and hexadecimal. Shows all bases simultaneously.
Enter a number above to see conversions in all bases.
How to Use
- Select your input base (BIN / OCT / DEC / HEX) using the toggle buttons, then type your number. The tool validates that only characters valid for the chosen base are accepted.
- All four bases update simultaneously in real time — binary (base 2), octal (base 8), decimal (base 10), and hexadecimal (base 16) are all displayed at once.
- Click the Copy button next to any result card to copy that representation to your clipboard.
Frequently Asked Questions
- What bases are supported?
- The tool converts between binary (base 2), octal (base 8), decimal (base 10), and hexadecimal (base 16). All four results are shown simultaneously so you can compare representations at a glance.
- Why is hexadecimal commonly used in computing?
- Hexadecimal compactly represents binary data: each hex digit maps exactly to 4 bits. This makes it easy to read memory addresses, color values, and binary-encoded data. For example, the byte 11111111 in binary is FF in hex — much shorter to write and read.
- Is there a size limit?
- No hard limit. Very large inputs may slow your browser.