Is there an NPM Module for PDF metadata?

Question

I'm looking for an npm module, that I can use to edit the metatags like Author and Title of PDF files.

Alternatively, an open-license JavaScript library would also be okay.

There's a program called pdftk, which would be suitable if it was an npm module.

http://stackoverflow.com/questions/30945445/how-to-get-pdf-title-using-pdf-js — Sumeet Kumar Yadav, Dec 28 '16 at 20:34
@TGrif Well, I've been searching for an appropriate library for a few days, but I can't find one. — Scriptim, Dec 28 '16 at 21:09

score 4 · Accepted Answer · answered Dec 29 '16 at 19:26

4

I have not tested this package but node-exiftool seems to provide pdf metadata edition.

Another possibility is to write your own module with use of pdftk (if available) and child_process.
Maybe I will try to make one myself.

answered Dec 29 '16 at 19:26

TGrif

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Grant Miller · Answer 2 · 2019-03-03T01:43:13.820

1

You can install the exiftool command line utility to edit the metadata of PDFs:

sudo apt install libimage-exiftool-perl

Then you can use the Node.js child_process.exec() function to call the command line utility from your program:

'use strict';

const exec = require('util').promisify(require('child_process').exec);

const execute = async command => {
  const {stdout, stderr} = await exec(command);

  console.log((stderr || stdout).trim());
};

(async () => {
  await execute('exiftool -title="Example PDF" -author="John Doe" /var/www/example.com/public_html/example.pdf');
})();

edited Mar 03 '19 at 01:43

answered Jul 23 '18 at 22:09

Grant Miller

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Thank you, however I think node-exiftool, as suggested in @TGrif's answer, which wraps exiftool is much more convenient. – Scriptim Jul 23 '18 at 23:12

score 0 · Answer 3 · answered Jun 21 '23 at 12:13

Can use https://www.npmjs.com/package/pdf-lib

import { PDFDocument } from 'pdf-lib';
const arrayBuffer = await readFile(file);
const pdf = await PDFDocument.load(arrayBuffer);
const pageCount = pdf.getPagesCount();

You have following fucntions to get the meta data from the PDF file. Ref: https://pdf-lib.js.org/docs/api/classes/pdfdocument

getAuthor
getCreationDate
getCreator
getForm
getKeywords
getModificationDate
getPage
getPageCount
getPageIndices
getPages
getProducer
getSubject
getTitle

Is there an NPM Module for PDF metadata?

3 Answers3

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