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Number Base
Convert numbers between binary, octal, decimal and hexadecimal
About Number Base
Number Base lets you convert numbers between binary, octal, decimal and hexadecimal.
Category: Text.
Frequently asked questions
What number bases are supported?
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Binary (base 2), octal (base 8), decimal (base 10), and hexadecimal (base 16) are the most common. The tool converts between all four instantly as you type.
Where is hexadecimal used in programming?
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Memory addresses, color codes (#FF5733), bit flags, byte-level data inspection, Unicode code points (U+1F600), and network protocols. Hex is compact — each digit represents exactly 4 bits.
What is the maximum number that can be converted?
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The tool handles numbers within JavaScript's safe integer range (2^53 - 1). For arbitrary precision integers, a dedicated big integer library is required.