How do I convert Word documents to PDF automatically?

You can automate Word-to-PDF conversion in a few common ways, depending on your environment.

1) Using Microsoft Word itself

If you have Word installed, you can script it to open .docx files and export them as PDFs.

VBA macro

Sub ConvertToPDF()
    Dim doc As Document
    Set doc = ActiveDocument
    doc.ExportAsFixedFormat OutputFileName:=Replace(doc.FullName, ".docx", ".pdf"), _
        ExportFormat:=wdExportFormatPDF
End Sub

PowerShell via COM

$word = New-Object -ComObject Word.Application
$word.Visible = $false

$doc = $word.Documents.Open("C:\Docs\file.docx")
$pdf = "C:\Docs\file.pdf"

$doc.SaveAs([ref] $pdf, [ref] 17)  # 17 = PDF
$doc.Close()
$word.Quit()

2) Using LibreOffice from the command line

Good for server or batch use, especially on Linux.

soffice --headless --convert-to pdf --outdir आउटुट_फोल्डर input.docx

Batch example:

for f in *.docx; do
  soffice --headless --convert-to pdf --outdir pdfs "$f"
done

3) Using Python

With LibreOffice

import subprocess
from pathlib import Path

input_file = Path("file.docx")
output_dir = Path("pdfs")
output_dir.mkdir(exist_ok=True)

subprocess.run([
    "soffice", "--headless", "--convert-to", "pdf",
    "--outdir", str(output_dir), str(input_file)
], check=True)

With Word on Windows

import win32com.client as win32

word = win32.Dispatch("Word.Application")
word.Visible = False

doc = word.Documents.Open(r"C:\Docs\file.docx")
doc.SaveAs(r"C:\Docs\file.pdf", FileFormat=17)
doc.Close()
word.Quit()

4) Cloud APIs

If you want a managed solution, services like:

• Microsoft Graph / OneDrive / SharePoint
• Aspose Words
• Adobe PDF Services
• CloudConvert

These are useful if you don’t want to manage Office/LibreOffice installs.

Which option should you use?

• Windows + Office installed: Word automation or PowerShell
• Linux/server/batch jobs: LibreOffice headless
• Need scaling or no local software: Cloud API

If you want, I can give you a ready-to-run script for:

• Windows
• Linux
• Python batch conversion
• Folder watcher that auto-converts new Word files to PDF