About
About Converter-Hex
A focused set of hexadecimal tools, built to be fast, exact and honest about their working.
What this site is
Converter-Hex does one family of things: moving numbers and data between base 16 and the notations people actually work in — decimal, binary, octal, text, Base64 and color.
There are around forty tools and reference pages here, and no plans to add a unit converter or a loan calculator. A site that does one thing can do it properly.
How the conversions work
Every tool runs as JavaScript in your browser. There is no server-side conversion, no API call and no queue. Two consequences follow, and both are deliberate.
- Nothing you type leaves your device. If you paste a key, a hash or part of a memory dump, it stays in the tab.
- Results are instant. Output updates on the keystroke, because there is no round trip to wait for.
Everything the site needs is served from this domain — fonts included — so opening a page here contacts nobody but us.
Arithmetic uses arbitrary-precision integers rather than floating point, so values above 253 convert exactly instead of quietly rounding. That silent rounding is the failure mode of a surprising number of converters, and it is worth checking for in any tool you rely on.
Why the nibble view is on every page
A converter that only prints an answer teaches you nothing and gives you no way to check it. Showing the four bits behind each hex digit costs almost nothing to render and turns the tool into something you can learn from — particularly if you are new to base 16 and trying to build the intuition rather than just get a number.
Accuracy
The conversions are deterministic and tested, and we would rather hear about a problem than have you work around one. If a result looks wrong, please get in touch with the input you used and what you expected.
The site map lists every page in one place if you would rather browse than search.
What it costs
Nothing, and there is no account to create. The tools are static files, so serving them is cheap enough that there is no reason to charge for or gate them.