Base Converter
Convert numbers between binary, octal, decimal, and hexadecimal bases online. Instant live conversion as you type.
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
About 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.
number base converterbinary to decimaldecimal to binaryhex to decimalbinary to hexdecimal to hexoctal converterbase converter online
Your privacy is built in
Everything in Base Converter runs locally in your browser — your data never leaves your device and is never uploaded to a server, so nothing you enter is stored or seen by anyone else. No account, no sign-up, no watermark, and completely free.
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.