72 free conversion and calculator tools that run entirely in your browser.
I kept running into the same small annoyance: needing a quick hex/binary/decimal or color conversion and landing on a page cluttered with ads, pop-ups, or a converter that quietly got the math wrong on anything past a 32-bit value.
HexCalculator is my attempt at fixing that — one place with dozens of focused, accurate tools that load fast, work entirely in your browser, and don't ask for anything in return. No accounts, no data collection, no server-side processing.
Unnikrishnan P — Creator, HexCalculator.
I build and maintain HexCalculator, along with a handful of other free browser-based utility tools. Questions or feedback? Email [email protected].
HexCalculator is a collection of free, browser-based tools for converting between binary, hexadecimal, decimal, and octal, plus related tasks like text/character encoding (UTF-8, EBCDIC, BCD, ASCII), signed integers and endianness, bitwise operations, networking values, and color formats.
Every tool runs as client-side JavaScript — there's no server-side processing, no account, and no installation. Open a page, type a value, and the result appears instantly.
Nothing you type into any tool on this site is uploaded, logged, or stored anywhere. The conversion happens locally in your browser and stays there.
The site is free to use with no sign-up. See the Privacy Policy for full details on what, if anything, is collected when you visit.
Programmers and students working across number bases, network engineers reading hex/IP values, and designers or developers converting between color formats (RGB, HSL, hex, and more).