Convert numbers between binary (base-2), octal (base-8), decimal (base-10), and hexadecimal (base-16).
Type a number into any of the base input fields — Binary, Octal, Decimal, or Hexadecimal.
The tool automatically converts your input to all other number bases in real-time.
Input values are validated to ensure they match the selected base (e.g., no digits above 1 in binary).
Copy any of the converted values with a single click on the corresponding field.
All processing is client-side. Your data never touches any server.
No page reloads or server round-trips. Results appear as you type or paste.
No registration, no usage caps, no premium tiers. Use as much as you need.
Fully responsive. Works on desktop browsers, tablets, and mobile phones.
The tool supports four common number bases: Binary (base-2), Octal (base-8), Decimal (base-10), and Hexadecimal (base-16). Each input field automatically validates that the entered digits are valid for that base.
Yes. Simply type a binary number (using only 0 and 1) into the Binary field, and the Hexadecimal field will instantly display the equivalent hex value without any extra steps.
The converter supports arbitrarily large numbers limited only by your browser's JavaScript engine. Very large numbers are handled with full precision.