Number Base Converter - Binary Decimal Hex Octal
Convert numbers between binary, octal, decimal, and hexadecimal bases online. Instant live conversion as you type.
⚙️ Developer ToolsFree Forever100% PrivateNo Upload NeededInstant Results
Type in any field — all others update instantly.
Base 2 — digits 0–1
0b
Base 8 — digits 0–7
0o
Base 10 — digits 0–9
Base 16 — digits 0–9, A–F
0x
Quick Reference
255 (dec) = FF (hex) = 11111111 (bin)16 (dec) = 10 (hex) = 10000 (bin)255 (dec) = 377 (oct)0xFF = 0b11111111 = 0o377
iAbout Base Converter
Convert any integer between the four most common number bases: Binary (base 2), Octal (base 8), Decimal (base 10), and Hexadecimal (base 16). Type in any field and all others update instantly. Perfect for developers, students, and anyone working with different number systems.
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?Frequently Asked Questions
What number bases are supported?
Binary (base 2), Octal (base 8), Decimal (base 10), and Hexadecimal (base 16).
Does it support negative numbers or fractions?
The tool supports positive integers only. Negative numbers and fractional values are not currently supported.
What is hexadecimal used for?
Hexadecimal is widely used in programming for memory addresses, color codes (#RRGGBB), and encoding binary data compactly.