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PDF files

This example goes over how to load data from PDF files. By default, one document will be created for each page in the PDF file, you can change this behavior by setting the splitPages option to false.

Setup​

npm install pdfjs-dist

Usage, one document per page​

import { PDFLoader } from "langchain/document_loaders/fs/pdf";

const loader = new PDFLoader("src/document_loaders/example_data/example.pdf");

const docs = await loader.load();

Usage, one document per file​

import { PDFLoader } from "langchain/document_loaders/fs/pdf";

const loader = new PDFLoader("src/document_loaders/example_data/example.pdf", {
  splitPages: false,
});

const docs = await loader.load();

Usage, legacy environments​

In legacy environments, you can use the pdfjs option to provide a function that returns a promise that resolves to the PDFJS object. This is useful if you want to use a custom build of pdfjs-dist or if you want to use a different version of pdfjs-dist.

Here we use the legacy build of pdfjs-dist, which includes several polyfills not included in the default build.

import { PDFLoader } from "langchain/document_loaders/fs/pdf";

const loader = new PDFLoader("src/document_loaders/example_data/example.pdf", {
  // you may need to add `.then(m => m.default)` to the end of the import
  pdfjs: () => import("pdfjs-dist/legacy/build/pdf.js"),
});

Alternatively, if the legacy build of pdfjs-dist doesn't work for you, you can use an older version bundled with pdf-parse:

npm rm pdfjs-dist # if you had installed it before
npm install pdf-parse
import { PDFLoader } from "langchain/document_loaders/fs/pdf";

const loader = new PDFLoader("src/document_loaders/example_data/example.pdf", {
  // you may need to add `.then(m => m.default)` to the end of the import
  pdfjs: () => import("pdf-parse/lib/pdf.js/v1.10.100/build/pdf.js"),
});