Number Base Converter
Convert numbers between binary, octal, decimal, hexadecimal, and any custom base (2-36) instantly.
Frequently Asked Questions
How do I convert decimal to binary online?▾
Enter your decimal number in the Decimal field and the binary, octal, and hexadecimal values update instantly. All conversions happen live in your browser with no server calls.
What number bases does this converter support?▾
This tool supports the four most common bases — binary (base 2), octal (base 8), decimal (base 10), and hexadecimal (base 16) — plus any custom base from 2 to 36.
Can this tool handle very large numbers?▾
Yes. The converter uses BigInt arithmetic internally, so it can accurately convert numbers of arbitrary size without precision loss.
Is my data safe when using this number base converter?▾
Yes. All conversion happens entirely in your browser using client-side JavaScript. No data is ever sent to a server.