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Number Base Converter

Convert numbers between binary, octal, decimal, and hex with bitwise views. Read 0xFF as 255 instantly — local math, free, no signup.

100% Local Browser Native

How to Use the Number Base Converter

1. Enter the number

Any of the four bases.

2. Read all bases

Binary, octal, decimal, hex together.

3. Copy per context

Code, subnets, or colors as needed.

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Frequently Asked Questions

0xFF in decimal?

255 — hex pairs map to bytes directly. Color codes (#FF0000) decode to RGB triples the same way.

Binary for subnetting?

Yes — octet-by-octet binary reveals network/host splits. 192.168.1.0/24 reads clearly in bits.

Negative numbers?

Two's complement representation with configurable bit width. Unsigned default; toggle for signed interpretation.

Do converted numbers upload?

No — math runs locally in your browser. Numbers never leave your device.

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Last updated October 2026