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Frameworks and Bundlers

Each standalone release package is available at The NodeJS package is designed to be used with frameworks and bundlers. It is a proper ECMAScript Module release which can be optimized with developer tools.

yarn add

Once installed, the library can be imported under the name xlsx:

import { read, writeFileXLSX } from "xlsx";

The "Bundlers" demo includes examples for specific bundler tools.


Older releases are technically available on the public npm registry as xlsx, but the registry is out of date. The latest version on that registry is 0.18.5

This is a known registry bug is the authoritative source for SheetJS scripts.

For existing projects, the easiest approach is to uninstall and reinstall:

yarn remove xlsx
yarn add

Encoding support

If Encoding support is required, cpexcel.full.mjs must be manually imported:

/* load the codepage support library for extended support with older formats  */
import { set_cptable } from "xlsx";
import * as cptable from 'xlsx/dist/cpexcel.full.mjs';