Number Base Converter
Convert numbers between binary, octal, decimal, and hexadecimal
How to Use Number Base Converter
Convert numbers between different bases (binary, octal, decimal, hexadecimal) instantly. Essential for programming, networking, and computer science.
- 1
Enter a number
Type a number in any base field — decimal, binary, octal, or hexadecimal.
- 2
See all conversions
All other base representations update instantly as you type.
- 3
Use preset values
Click common values like 255, 1024, or 65535 for quick reference.
- 4
Copy any value
Click Copy next to any field to grab the value with its prefix (0b, 0o, 0x).
Frequently Asked Questions
What number bases are supported?
Binary (base 2), octal (base 8), decimal (base 10), and hexadecimal (base 16).
Does it support negative numbers?
Yes, enter a minus sign before the number to convert negative values.
What is the ASCII reference?
For decimal values 32-126, the tool shows the corresponding ASCII character.
Is this tool free?
Yes, completely free with no signup required. All conversion happens in your browser.