Number Base Converter
Convert numbers between binary, octal, decimal and hexadecimal instantly.
How to use the Number Base Converter
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Type a value in any base field.
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See it in every other base.
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Copy what you need.
Convert binary, octal, decimal & hex
Programmers constantly switch between number bases — hex for colors and memory, binary for bitmasks, decimal for everyday math. This converter shows a value in all four bases simultaneously, updating live as you type in any field.
Key features
- Binary, octal, decimal & hex together
- Edit any base — others update live
- Handles large integers
- Instant, in-browser conversion
Frequently asked questions
Can it convert large numbers?
Yes — it uses big-integer parsing so very large values convert accurately.
Does it support negative numbers?
It focuses on non-negative integers, which covers the vast majority of base-conversion needs.
Is hex case-sensitive?
No — you can type hex digits in upper or lower case.