Solvedpdf lib Add metadata


Is it possible to add metadata to the PDF?


25 Answers

✔️Accepted Answer

Version 1.2.0 is now published.

It contains several new methods on PDFDocument to easily add metadata to documents:

  • PDFDocument.setTitle(string)
  • PDFDocument.setAuthor(string)
  • PDFDocument.setSubject(string)
  • PDFDocument.setKeywords(string[])
  • PDFDocument.setProducer(string)
  • PDFDocument.setCreator(string)
  • PDFDocument.setCreationDate(Date)
  • PDFDocument.setModificationDate(Date)

The full release notes are available here.

You can install this new version with npm:

npm install pdf-lib@1.2.0

It's also available on unpkg:

Other Answers:

Hello @erjimmmy. You can add metadata to PDFs with pdf-lib. There isn't currently a nice high level API for it, though. So the code is a bit ugly, but it works nonetheless!

(Note that PDFs store metadata in XMP format. The XMP standard supports a wide variety of options, and even allows you to add your own custom tags.)

Here's a snippet that creates a PDF and adds metadata to it with a couple details omitted for brevity:


const addMetadataToDoc = (pdfDoc, options) => {
  const metadataXML = `
    <?xpacket begin="" id="W5M0MpCehiHzreSzNTczkc9d"?>
      <x:xmpmeta xmlns:x="adobe:ns:meta/" x:xmptk="Adobe XMP Core 5.2-c001 63.139439, 2010/09/27-13:37:26        ">
        <rdf:RDF xmlns:rdf="">

          <rdf:Description rdf:about="" xmlns:dc="">
                  <rdf:li xml:lang="x-default">${options.title}</rdf:li>
                  .map((keyword) => `<rdf:li>${keyword}</rdf:li>`)

          <rdf:Description rdf:about="" xmlns:xmp="">

          <rdf:Description rdf:about="" xmlns:pdf="">

    <?xpacket end="w"?>

  const metadataStreamDict = PDFDictionary.from(
      Type: PDFName.from('Metadata'),
      Subtype: PDFName.from('XML'),
      Length: PDFNumber.fromNumber(metadataXML.length),

  const metadataStream = PDFRawStream.from(

  const metadataStreamRef = pdfDoc.register(metadataStream);

  pdfDoc.catalog.set('Metadata', metadataStreamRef);

const pdfDoc = PDFDocumentFactory.create();
const [TimesRomanFont] = pdfDoc.embedStandardFont('Times-Roman');
const [HelveticaFont] = pdfDoc.embedStandardFont('Helvetica');

const contentStream = pdfDoc.createContentStream( ... );

const page = pdfDoc
  .createPage([500, 600])
  .addFontDictionary('Helvetica', HelveticaFont)
  .addFontDictionary('TimesRoman', TimesRomanFont)


addMetadataToDoc(pdfDoc, {
  author: 'Humpty Dumpty',
  title: 'The Life of an Egg',
  subject: 'An Epic Tale of Woe',
  keywords: ['eggs', 'wall', 'fall', 'king', 'horses', 'men'],
  producer: `Your App's Name Goes Here`,
    'pdf-lib pdf-lib_version_goes_here (',
  documentCreationDate: new Date(),
  documentModificationDate: new Date(),
  metadataModificationDate: new Date(),

const pdfBytes = PDFDocumentWriter.saveToBytes(pdfDoc);

  • Here is the resulting PDF file: the_life_of_an_egg.pdf
  • And here is a screenshot of the resulting PDF in Acrobat, with the "File -> Properties" window opened:
    screen shot 2018-12-17 at 8 52 09 am
  • Finally, here is the complete Node.js script (the .txt extension is to make GitHub happy): humpty_dumpty.js.txt

Please let me know if this is what you're looking for!

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