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Open Adobe Acrobat.
Go to File > Combine Files.
Click Add Files and select the PDF files you want to merge.
Arrange the files in your desired order by dragging and dropping them within the list.
Click Combine to merge the selected files into a single PDF document.
Save the new combined PDF to your preferred location.
You can preview and reorder files before combining to ensure the final PDF is in the correct sequence.
This runs in the Acrobat app - there is no separate API for this task.
Combine Files can sometimes struggle with damaged or complex source files. This might cause it to hang or only include the first document. To prevent this, try re-saving each source file with 'Save As' before combining. This often refreshes the file's internal structure and helps Acrobat process it correctly. If problems continue, adding files one by one can also help identify a problematic source.
In Adobe Acrobat, 'merging' and 'combining' files mean the same thing. Both terms refer to the process of taking multiple separate documents, regardless of their original file type, and joining them together to create a single, unified PDF document. The feature is called 'Combine Files' in the Acrobat menu.
No, if your original documents already had page numbers printed on them, combining them will cause the page numbering to restart with each new document. For continuous page numbers across the entire combined PDF, you will need to add new page numbers after the combining process is complete. Acrobat has tools for adding consistent page numbering to a finished PDF.
Combining files rarely makes the PDF smaller. In fact, it might even make it larger. If you need to reduce the file size of your combined PDF, you should use Acrobat's 'Optimize PDF' or 'Reduce File Size' feature after you have finished combining all your documents. This tool will compress the content and remove unnecessary data.