Number Bases
Reckonersweight 1reckoner · computes, doesn't store
Binary for the machines, hexadecimal for the colour codes, decimal for the humans — and you, stuck translating between them. Number Bases converts a number from one base to another and shows you the result, whether you are debugging, studying, or simply curious what your birthday looks like in binary. It computes and keeps nothing; the bases have no memory here.
This is not a screenshot. It's the real tool, running right here — go on, put something in it.
Open the demo full-screen: /demos/number-bases.html
Questions people ask
How do I convert a decimal number to binary or hex?
Type the number, choose the bases, read the answer. The conversion happens instantly in the page — there is a live demo right here if you want to see for yourself.
Does this base converter work without internet?
Completely. It is a single HTML file that runs offline in your browser, computes on the spot, and stores nothing — nothing you type ever leaves the page. Handy in an exam-revision cabin with no signal.
Who actually needs to convert number bases?
Programmers reading hex dumps, students meeting binary for the first time, electronics tinkerers, and puzzle-setters. Also anyone who has stared at a colour code and wondered what the numbers meant.
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