Set PDF Metadata

PDF documents can contain both standard metadata (Title, Subject, Keywords, Creator, Author) and custom metadata stored as XMP properties. Aspose.PDF provides a simple API to modify these properties in Python. This guide covers how to update these fields and save the modified PDF file using the PdfFileInfo class.

1. Load the PDF file.
2. Update standard metadata.
3. Add or update custom metadata.
4. Save updated metadata.

import aspose.pdf as ap
import aspose.pdf.facades as pdf_facades
from io import FileIO

import sys
from os import path

sys.path.append(path.join(path.dirname(__file__), ".."))

from config import set_license, initialize_data_dir


def set_pdf_metadata(infile, outfile):

    # Get PDF information
    pdf_info = pdf_facades.PdfFileInfo(infile)

    # Set PDF metadata
    pdf_info.subject = "Aspose PDF for Python via .NET"
    pdf_info.title = "Aspose PDF for Python via .NET"
    pdf_info.keywords = "Aspose, PDF, Python, .NET"
    pdf_info.creator = "Aspose Team"

    pdf_info.set_meta_info("CustomKey", "CustomValue")

    # pdf_info.save_new_info(outfile)
    # Is obsolete, use save() method instead

    # Save updated metadata
    pdf_info.save(outfile)