Nutrient Node.js SDK

Convert documents to and from PDF in Node.js

Q: How do I convert Word to PDF in Node.js?

Read the DOCX file into a buffer, load it with load() , and call exportPDF() to get a PDF buffer you can write to disk. Nutrient converts Word, Excel, and PowerPoint without LibreOffice or Microsoft Office. See the Office to PDF guide for more information.

Q: How do I convert a PDF to an image in Node.js?

Load the PDF and call renderPage() with the page index and a target width. By default, the page is exported as PNG; pass "webp" as the third argument to export WebP instead. Any annotations on the page are rendered over the page background. See the PDF to image guide for more information.

Q: How do I convert an image to PDF in Node.js?

Read the image into a buffer, load it with load() , and call exportPDF() . JPG, PNG, and multipage TIFF images are supported. See the image to PDF guide for more information.

Start free Conversion guides

Convert Word, Excel, and PowerPoint to PDF — no LibreOffice or Microsoft Office required
Convert JPG, PNG, and TIFF images to PDF
Render PDF pages to PNG or WebP images
Pure Node.js — no third-party tools or native dependencies to install

Need pricing or implementation help? Talk to Sales.

PDF CONVERSION IN NODE.JS

1
import fs from "node:fs";
2
import { load } from "@nutrient-sdk/node";
3

4
const docxFile = fs.readFileSync("source.docx");
5

6
const instance = await load({ document: docxFile });
7
const buffer = await instance.exportPDF();
8

9
fs.writeFileSync("converted.pdf", Buffer.from(buffer));
10
await instance.close();

1
import fs from "node:fs";
2
import { load } from "@nutrient-sdk/node";
3

4
const pngImage = fs.readFileSync("source.png");
5

6
const instance = await load({ document: pngImage });
7
const buffer = await instance.exportPDF();
8

9
fs.writeFileSync("converted.pdf", Buffer.from(buffer));
10
await instance.close();

1
import fs from "node:fs";
2
import { load } from "@nutrient-sdk/node";
3

4
const doc = fs.readFileSync("source.pdf");
5

6
const instance = await load({ document: doc });
7
const pageWidth = instance.getDocumentInfo().pages[0].width;
8
const result = await instance.renderPage(0, { width: pageWidth }, "webp");
9

10
fs.writeFileSync("page.webp", Buffer.from(result));
11
await instance.close();

A complete PDF conversion library for Node.js

Office to PDF

Convert Word, Excel, and PowerPoint documents to PDF with a self-contained engine — no Office install.

Image to PDF

Turn JPG, PNG, and multipage TIFF images into PDF documents in a single call.

PDF to image

Render individual PDF pages to PNG or WebP, with annotations drawn over the page.

No external dependencies

Built from the ground up — no LibreOffice, Microsoft Office, or native binaries to manage.

Comprehensive PDF conversion capabilities

Word, Excel, PowerPoint to PDF

Convert DOCX, XLSX, and PPTX (and legacy DOC, XLS, PPT) to PDF without third-party tools.

VIEW GUIDE

No LibreOffice or Microsoft Office dependency
Embed custom fonts for exact output
Single exportPDF() call

Image to PDF

Convert JPG, PNG, and multipage TIFF images into PDF documents.

VIEW GUIDE

JPG, PNG, and TIFF input
Multipage TIFF support
Load the image and export to PDF

PDF to image

Render PDF pages to PNG or WebP images at the dimensions you specify.

VIEW GUIDE

Export pages to PNG or WebP
Control output width per page
Annotations rendered over the page

Self-contained engine

Run conversion entirely within Node.js — no external converters or native dependencies.

VIEW GUIDES

No LibreOffice or MS Office licenses
Deploys cleanly to servers and containers
Consistent output across environments

Built for Node.js document pipelines

Load a document, convert it, and write the result — all with one asynchronous API. The SDK handles Office, image, and PDF formats without external tools, so it deploys cleanly to servers, containers, and serverless functions.

VIEW DOCUMENTATION

Office inputs

DOCX XLSX PPTX DOC/XLS/PPT

Image formats

JPG PNG TIFF WebP

Node API

load exportPDF renderPage getDocumentInfo

HOW CONVERSION WORKS

Load, convert, and write — in one asynchronous flow

Read a file into a buffer, load it into a Nutrient instance, and export to PDF or render pages to images. The same load-and-export pattern handles Office documents, images, and PDFs, so conversion code stays consistent across formats.

EXPLORE NODE.JS SDK

Load any supported file

Pass a document buffer to load() — Office files, images, and PDFs all use the same entry point.

Export to PDF

Call exportPDF() to convert Office documents and images into a PDF buffer you can write to disk or stream.

Render pages to images

Use renderPage() to export individual PDF pages as PNG or WebP at a width you control.

Embed custom fonts

Provide font files when converting Office documents so the output PDF matches the original typography.

Frequently asked questions

How do I convert Word to PDF in Node.js?

Read the DOCX file into a buffer, load it with load(), and call exportPDF() to get a PDF buffer you can write to disk. Nutrient converts Word, Excel, and PowerPoint without LibreOffice or Microsoft Office. See the Office to PDF guide for more information.

How do I convert Excel to PDF in Node.js?

Excel conversion uses the same flow as Word and PowerPoint: Load the XLSX file and call exportPDF(). The SDK supports DOCX, XLSX, and PPTX along with the legacy DOC, XLS, and PPT formats — all with its own built-in conversion engine.

How do I convert a PDF to an image in Node.js?

Load the PDF and call renderPage() with the page index and a target width. By default, the page is exported as PNG; pass "webp" as the third argument to export WebP instead. Any annotations on the page are rendered over the page background. See the PDF to image guide for more information.

How do I convert an image to PDF in Node.js?

Read the image into a buffer, load it with load(), and call exportPDF(). JPG, PNG, and multipage TIFF images are supported. See the image to PDF guide for more information.

Do I need LibreOffice or Microsoft Office?

No. Nutrient Node.js SDK converts Office documents using its own technology, built from the ground up. It doesn’t depend on LibreOffice, Microsoft Office, or any other third-party converter, which makes it straightforward to deploy to servers and containers.

What file formats are supported for conversion?

The SDK converts PDF; Office formats (DOCX, DOC, DOTX, DOCM, XLSX, XLS, XLSM, PPTX, PPT, PPTM); and image formats (PNG, JPEG, JPG, TIFF, TIF). PDF pages can be rendered out to PNG or WebP images.

Can I keep custom fonts when converting Office documents?

Yes. If an Office document uses fonts the SDK can’t access, it substitutes equivalents (for example, Arial with Noto) by default. To preserve the original typography, pass the custom font files to load() via the fonts option and the output PDF will use them.

Is there a free trial?

Yes. Get started with a free trial that includes full conversion functionality. Then contact Sales for pricing or a production license.

Explore more

Also available for

More Node.js SDK resources