💻 computer-languages

File extensions for computer languages.

It's just a JSON file, so you can use it in any environment. Sourced from GitHub's Linguist project (defines all 700+ languages known to GitHub). Data is updated via script and released via new package version.

⚡ Installation

From your project root:

npm install computer-languages

🔌 Usage

ES Modules (ESM):

import computerLangs from 'computer-languages'

pyLangData = computerLangs.Python

console.log(pyLangData.type) // => programming
console.log(pyLangData.extensions) // => [ '.cgi', '.fcgi', '.gyp', ... ]

CommonJS (CJS):

const computerLangs = require('computer-languages')

console.log(pyLangData.type) // => programming
console.log(pyLangData.extensions) // => [ '.cgi', '.fcgi', '.gyp', ... ]

💻 Examples

Get extension(s) for a language:

jsExts = computerLangs.JavaScript.extensions

console.log(jsExts) // => [ '._js', '.bones', '.cjs', '.es', ... ]

Get language(s) from an extension:

function getLang(fileExt) {
    const langMatches = Object.entries(computerLangs)
        .filter(([_, data]) => data.extensions.includes(fileExt))
        .map(([lang]) => lang)
    return langMatches.length == 1 ? langMatches[0] : langMatches
}

console.log(getLang('.rs')) // => [ 'RenderScript', 'Rust', 'XML' ]

Filter by language type:

const markupLangs = Object.keys(computerLangs)
    .filter(lang => computerLangs[lang].type == 'markup')

console.log(markupLangs) // => [ 'Antlers', 'API Blueprint', 'Astro', 'BibTeX', ... ]
console.log(`${markupLangs.length} markup languages`) // -> 69 markup languages

MIT License

Copyright © 2026 Adam Lui

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