#  [](https://www.npmjs.com/package/@thi.ng/hex)  [](https://mastodon.thi.ng/@toxi) > [!NOTE] > This is one of 209 standalone projects, maintained as part > of the [@thi.ng/umbrella](https://github.com/thi-ng/umbrella/) monorepo > and anti-framework. > > 🚀 Please help me to work full-time on these projects by [sponsoring me on > GitHub](https://github.com/sponsors/postspectacular). Thank you! ❤️ - [About](#about) - [Status](#status) - [Related packages](#related-packages) - [Installation](#installation) - [Dependencies](#dependencies) - [API](#api) - [Authors](#authors) - [License](#license) ## About Hex string formatters for 4/8/16/24/32/48/64bit words, hexdump formatting of binary data. ## Status **STABLE** - used in production [Search or submit any issues for this package](https://github.com/thi-ng/umbrella/issues?q=%5Bhex%5D+in%3Atitle) ## Related packages - [@thi.ng/base-n](https://github.com/thi-ng/umbrella/tree/develop/packages/base-n) - Arbitrary base-n conversions w/ presets for base8/16/32/36/58/62/64/83/85, support for bigints and encoding/decoding of byte arrays ## Installation ```bash yarn add @thi.ng/hex ``` ESM import: ```ts import * as hex from "@thi.ng/hex"; ``` Browser ESM import: ```html ``` [JSDelivr documentation](https://www.jsdelivr.com/) For Node.js REPL: ```js const hex = await import("@thi.ng/hex"); ``` Package sizes (brotli'd, pre-treeshake): ESM: 631 bytes ## Dependencies None ## API [Generated API docs](https://docs.thi.ng/umbrella/hex/) ```ts import * as h from "@thi.ng/hex"; const cssColor = (x: number) => "#" + h.U24(x); cssColor(10597059) // "#a1b2c3" h.U48(223928981472033); // "cba987654321" h.U48HL(0xcba9, 0x87654321) // "cba987654321" h.U64(0xaa * 0x010101010101) // "0000aaaaaaaaaaaa" h.U64HL(0x11223344, 0x89abcdef); // "1122334489abcdef" // format directly from byte arrays const BUF = [1, 2, 3, 4, 0x10, 0x20, 0x30, 0x40]; // big-endian h.U32BE(BUF, 0) // "01020304" h.U32BE(BUF, 4) // "10203040" // little-endian h.U32LE(BUF, 0) // "04030201" h.U32LE(BUF, 4) // "40302010" ``` ## Authors - [Karsten Schmidt](https://thi.ng) If this project contributes to an academic publication, please cite it as: ```bibtex @misc{thing-hex, title = "@thi.ng/hex", author = "Karsten Schmidt", note = "https://thi.ng/hex", year = 2020 } ``` ## License © 2020 - 2025 Karsten Schmidt // Apache License 2.0