🔧 Utility Tools
Number Base Converter
Convert between binary, decimal, hexadecimal, octal, and any base from 2 to 36. Live conversion — type in any field and others update instantly.
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Custom base (2-36)
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How it works
01
Pick Base
Type in any field — binary, decimal, hex, or custom.
02
Live Convert
Other bases update instantly as you type.
03
Copy Result
One-click copy for any base.
Frequently asked questions
What are common number bases?
Binary (2): computers use it internally. Decimal (10): our normal counting. Hexadecimal (16): programming for RGB colors and memory addresses. Octal (8): older Unix file permissions.
Why do hex uses letters?
Hex base 16 needs digits 0-15, but we only have 0-9 as digits. So it uses A=10, B=11, C=12, D=13, E=14, F=15.
What's the biggest base supported?
Base 36 — uses 0-9 then A-Z. Sometimes used for compact numeric IDs. Anything above needs custom character sets not supported here.
Is my data uploaded?
No. All conversion runs in your browser.
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