DOCX

Export

Export documents to buffer, blob, base64, string, or stream

The Packer class converts a Document into various output formats.

toBuffer

Returns a Uint8Array. Best for Node.js file I/O.

import { Packer } from "@office-open/docx";
import { writeFileSync } from "node:fs";

const buffer = await Packer.toBuffer(doc);
writeFileSync("output.docx", buffer);

toBlob

Returns a Blob. Best for browser environments.

const blob = await Packer.toBlob(doc);
const url = URL.createObjectURL(blob);

// Trigger download
const a = document.createElement("a");
a.href = url;
a.download = "output.docx";
a.click();
URL.revokeObjectURL(url);

toBase64String

Returns a Base64-encoded string. Useful for data URLs or API payloads.

const base64 = await Packer.toBase64String(doc);
const dataUrl = `data:application/vnd.openxmlformats-officedocument.wordprocessingml.document;base64,${base64}`;

toString

Returns a string representation. Useful for debugging.

const str = await Packer.toString(doc);
console.log(str);

toStream

Returns a ReadableStream. Useful for streaming large documents.

import { createWriteStream } from "node:fs";

const stream = await Packer.toStream(doc);
const writeStream = createWriteStream("output.docx");
stream.pipeTo(writeStream);

Summary

Method	Return Type	Environment	Use Case
`toBuffer`	`Uint8Array`	Node.js	File I/O
`toBlob`	`Blob`	Browser	Downloads
`toBase64String`	`string`	Any	Data URLs, APIs
`toString`	`string`	Any	Debugging
`toStream`	`ReadableStream`	Node.js	Large files

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Parsing

Parse and inspect existing .docx files with parseDocx