sheet-to-array-browser

Convert Excel/Sheet files (.xlsx, .xls) into JavaScript arrays with ease.
Works in both browsers (via <input type="file"> or drag-drop) and Node.js.

✨ Features

• ✅ Parse .xlsx and .xls files into JSON/arrays
• ✅ Works in browsers and Node.js
• ✅ Supports selecting a specific worksheet (by index or name)
• ✅ Built on SheetJS/xlsx
• ✅ Lightweight, tree-shakeable, TypeScript-ready

📦 Installation

npm i sheet-to-array-browser

🚀 Usage

Browser (with file input)

import { parseWorkbook } from "sheet-to-array-browser";

document.getElementById("fileInput").addEventListener("change", async (e) => {
  const file = e.target.files[0];
  const rows = await parseWorkbook(file, { sheet: 0 });
  console.log(rows);
});

Node.js (with Buffer/ArrayBuffer)

import { readFileSync } from "fs";
import { parseWorkbook } from "sheet-to-array-browser";

const buffer = readFileSync("./example.xlsx");
const rows = await parseWorkbook(buffer, { sheet: "Data" });

console.log(rows);

📖 API

parseWorkbook(input, options?)

• input

  File | Blob | ArrayBuffer | Buffer

  (Works with browser files, Node Buffers, or raw ArrayBuffers)

• options (optional)

  • sheet (number | string) → Which sheet to read

  • index (0 = first sheet)

  • or sheet name ("Data")

  • default: 0

• sheetToJson (XLSX.Sheet2JSONOpts) → Options passed to XLSX.utils.sheet_to_json

• Returns

  Promise<Array<object>> → An array of row objects.

🛠 Development

Clone the repo and run:

npm install
npm run build
npm test

npm run build → Build dist files

npm test → Run unit tests (Vitest)

npm run pack:check → Preview files that will publish