Number Base Converter
Convert numbers between Binary, Octal, Decimal, and Hexadecimal formats instantly
About this tool
Convert numbers between different bases: Binary, Octal, Decimal, and Hexadecimal Number Base Converter runs in the browser on DevTools. There is no signup, and your input stays on this device unless the tool explicitly performs a live network lookup.
What this tool does not do
- Number Base Converter is a free in-browser utility, not a hosted API. It does not keep server-side history and is not a substitute for production verification in your own stack.
How do I use this tool?
How do I use Number Base Converter?
Open Number Base Converter, enter or paste your input, and copy the result. The page works without an account.
Related guides
Why Every Browser Calculator Gets 0.1 + 0.2 Wrong (and How to Fix It)
IEEE 754 floating-point math makes 0.1 + 0.2 equal 0.30000000000000004 in almost every web calculator. Here is what causes it, when it bites engineers, and how arbitrary-precision decimals solve it.
How Text Becomes Bytes: Binary, Hex, and UTF-8 Explained
What happens when you save a text file, how UTF-8 encodes characters, and why the same string can be different lengths in binary.
Thinking in Bits: Hex, Binary, Two's Complement and IEEE 754
A working programmer's guide to number bases, bitwise masks, two's-complement negatives and why 0.1 isn't really 0.1. Build intuition before you reach for a.
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