Number Base Converter
Convert between binary, decimal, hexadecimal, octal and more bases (2-36).
Base 10
ffBase 16
All common bases
Binary
11111111Octal
377Decimal
255Hexadecimal
ffAbout this tool
Developers work with multiple number bases daily: binary for bitmasks, hexadecimal for memory addresses, octal for file permissions. This converter translates any number between any two bases from 2 to 36, instantly in your browser.
How to use the Number Base Converter
- Enter the number you want to convert
- Select the source base (e.g. Binary = 2, Decimal = 10)
- Select the target base (e.g. Hexadecimal = 16)
- See the result instantly and copy it
Features
- Supports all bases from 2 to 36
- Binary, Decimal, Hexadecimal, Octal presets
- Instant conversion as you type
- Copy result in one click
- Fully client-side, no data sent
Frequently asked questions
Is this number base converter free?
Yes. Convert between binary, decimal, hexadecimal, octal, and any base from 2 to 36 for free.
What bases are supported?
All integer bases from 2 to 36 are supported, including standard presets: Binary (2), Octal (8), Decimal (10), and Hexadecimal (16).
Does it handle large numbers?
Yes. The converter uses JavaScript BigInt precision to handle very large numbers accurately.
Is my input sent to a server?
No. All calculations happen locally in your browser.