Join files in PDF24 Assistant via shortcut or command line

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  • 2025-02-08 at 10:00 #63802
    some53
    Participant

    Hi,

    I have a repetitive task of joining pdf file and saving them using PDF24 assistant. For this I have to click on the join button then on the save as PDF button. Currently I automate this using AHK mouse movement but this is unreliable as I am blindly clicking on the window position.

    [url=https://postimages.org/][img]https://i.postimg.cc/DfQmmfNQ/pdf24.jpg[/img][/url]

    I was wondering if there is any Shortcut key to join all the files available on the pdf24 assistant and another shortcut key to save them. A command line will also help but there is not input directory for the pdf. The pdf files are generated by directly printing using pdf24 printer. so I can't use the following script,

    @echo off

    set "output=C:\path\to\output.pdf"

    set "input_dir=C:\path\to\pdfs"

    pdf24-assistant --merge -o "%output%" "%input_dir%\*.pdf"

    or is there a way to merge the pdf that is on the PDF24 assistant window even without input_dir? I would really appreciate any help or suggestions on this. Thank you.

    2026-10-30 at 15:54 #65311
    PDF24 Support
    Moderator

    Hello,

    sorry for the late reply. The PDF24 Assistant has no keyboard shortcuts for Join files and Save as PDF, and its file list cannot be controlled from the command line (a command pdf24-assistant --merge does not exist). Keyboard shortcuts in the Assistant are on our to-do list.

    For a repetitive task like yours, you can do it without the Assistant: let the PDF printer save the files automatically into a folder and then join this folder with the command line.

    1. In the PDF24 Settings open PDF Printer. If you still want the Assistant for your normal printing, first add a second printer with Install a PDF printer (e.g. "PDF24 Join") and select it.
    2. Under PDF Printer Tool choose Automatically save documents after printed and under Auto Save set the Output Directory, e.g. C:\Join\in. The default file name starts with the date and time, so the files are sorted in the order they were printed.
    3. Print your documents to this printer, then run:
    "C:\Program Files\PDF24\pdf24-DocTool.exe" -join -profile special/justAssemble -sort -expandDirs -includeFileExtensions .pdf -outputFile "C:\Join\output.pdf" "C:\Join\in"

    -expandDirs takes all files of the folder, -includeFileExtensions .pdf only the PDF files, -sort sorts them by name and -profile special/justAssemble only joins the files without showing a dialog. Afterwards empty the folder C:\Join\in, so that the next run only joins the new files.

    The command line options are described in the manual:
    https://creator.pdf24.org/manual/11/#1115-join-input-files-and-create-an-output-pdf-file
    https://creator.pdf24.org/manual/11/#1111-general-format-and-options

    Joining also works online: https://tools.pdf24.org/en/merge-pdf

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