How do I combine files into one PDF using Adobe Acrobat?

Open Adobe Acrobat. Click 'Combine Files'. Add all the documents you want to merge. Arrange them in the correct order. Click 'Combine' to create your single PDF.

What should I do if Combine Files only shows the first document or gets stuck?

Re-save each source file using 'Save As' to refresh its internal structure. Try adding your files one by one instead of all at once. Go to Help > Repair Installation in Acrobat to fix any software issues. Make sure all your source files are closed before combining them.

Prepare Evidence Package in Adobe Acrobat — How-to & AI prompts

AI prompts

2 ways to ask · copy any one

AExecute — “help me do it”Prepare one consolidated PDF with interview notes and site observations for HR — combine the…+

Prepare one consolidated PDF with interview notes and site observations for HR — combine the five interview notes and two site photos into a single file, ordered by location, and deliver it to HR lead [approver=Maria Gomez].

when the reply comes backPush once: ask it to sharpen the weakest part, and to say what it assumed.

BImprove — “do it better”Before handing the evidence package to [approver=Maria Gomez], combine the interview notes and…+

Before handing the evidence package to [approver=Maria Gomez], combine the interview notes and photos into one PDF, add a two‑page index mapping observations to roles and locations, redact personal contact details, and bookmark each interview so HR can act on staffing gaps quickly.

when the reply comes backPush once: ask it to sharpen the weakest part, and to say what it assumed.

How to do it

the tool · the steps · what to avoid

1
Open Adobe Acrobat.
2
Go to File > Combine Files.
3
Click Add Files and select the PDF files you want to merge.
4
Arrange the files in your desired order by dragging and dropping them within the list.
5
Click Combine to merge the selected files into a single PDF document.
6
Save the new combined PDF to your preferred location.

In the appWith the API

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.

Glossary

words on this page

Combine FilesAn Acrobat feature that puts multiple documents or images into a single PDF.ExampleYou use this Acrobat feature to gather several reports and images into one PDF.

Evidence PackageA single PDF document that contains all related files for a specific topic, like a legal case.ExampleThe entire legal case, including all related documents, was compiled into one evidence package.

BookmarksLinks in a PDF that let you jump to different sections, like a table of contents.ExampleThe document's bookmarks allowed us to quickly navigate between different sections of the report.

Who does this

3 roles

Office AdministratorLegal AssistantAcademic Coordinator

FAQ

about this task

Open Adobe Acrobat.
Click 'Combine Files'.
Add all the documents you want to merge.
Arrange them in the correct order.
Click 'Combine' to create your single PDF.

Keeping 'Preserve Bookmarks' on is important because it makes your combined PDF easy to navigate. Each original file becomes a top-level bookmark in the new document. This means you can quickly jump to any section that came from an original file, which is very helpful for large documents like an evidence package.

Re-save each source file using 'Save As' to refresh its internal structure.
Try adding your files one by one instead of all at once.
Go to Help > Repair Installation in Acrobat to fix any software issues.
Make sure all your source files are closed before combining them.

Yes, you can combine files automatically using the Adobe PDF Services API. This allows developers to write code that merges documents programmatically. It supports combining up to 20 files and lets you specify which pages from each file to include. This is useful for large-scale or repeated merging tasks.

It is recommended to compress the PDF after combining files because merging rarely makes the file size smaller. If you compress individual files first, then combine them, you might not get the best overall compression for the final large document. Compressing the single, combined PDF lets Acrobat optimize the entire file at once, which usually results in a smaller file size.

Prepare Evidence Package

When to use it

AI prompts

How to do it

Glossary

The real tasks

Who does this

FAQ

Sources

Adobe help

Video

Other guides

When it fails