How to Merge your Documents and Images to PDF Online?

Illustration of How to Merge PDF AvePDF

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Table of Contents

The missing files story

Did you know that the most frequent PDF feature search on Google is “merge PDF”?

When we think about it, it is not surprising.
How many files are lost every day in emails because the sender forgot attachments or the recipient failed to download all documents?

Also, when using various online services, most forms restrict the number of attachments to upload. It just happened to me again this week when I could only attach three files in my health insurance application, and I had five different documents to send. 

To ensure that all the necessary information will be found in a single file and successfully processed, you can use various tools to merge or combine your documents in a PDF. 

To zip or not to zip?

Of course, you can also zip your documents and send the zip file in an attachment.

But be careful: hackers frequently use zip files to spread malware. That is why the email system of many organizations will simply block all emails containing zip files. 

As a life rule, you should never open an attachment in an email from an unknown source. It is especially true with zip files (and also with .xls files, see our “Did you know?” section in our Excel to PDF widget). 

Merge and combine

You may have noticed that we have two similar tools on AvePDF to merge your files:

What is the difference?

The first tool merges PDFs and zip files only, while the second combines more than 100 formats (including Microsoft Office files and images) to PDF. 

“Ok, this is great,” you will think, “but why two widgets when you could have a single one?”

And this is where I say: “Excellent question, thank you for asking!”

AvePDF is the visible (and free) part of our PassportPDF API, and more generally, of our SDK and productivity solutions offer.
At ORPALIS, we’re focused on developing components, and AvePDF is here to demonstrate all the things you can do with our various toolkits. Every day, our customers come with new use cases, and when some companies only use PDF files, others want to be able to combine all types of formats in their applications.
What we want to show is that thanks to our tools, you can do both, and more! 

We provide more than 4,000 functionalities for PDF and electronic document management. And not all of them are on AvePDF! 

Back to our merge and combine widgets.

In the video and the step-by-step tutorial below, we used the Merge to PDF widget.
If you prefer to use the Combine to PDF widget, the steps will be the same! 


1. Go to

To start, visit or click here to land directly on the Merge to PDF tool.

Merge PDF AvePDF

2. Upload your file

Drag and drop your file or upload it from your device or your cloud storage service.

Merge PDF AvePDF

3. Choose the order of the files

Check the order of the files. If needed, you can reorganize them by moving each file to the right or the left.
Then, click on the Merge button.

Merge PDF AvePDF

4. Download your merged file

Click Download to get your merged document!

Merge PDF AvePDF

All documents processed with AvePDF are automatically deleted from our servers after 30 minutes.
If you prefer, you can delete the file manually right after processing by clicking the bin icon.

Remember, if your merged or combined PDF is too heavy, hyper-compress it!

You merged scanned PDFs and you wish to make your document searchable? Check our OCR tutorial

You will find our merge and combine engines in our PaperScan Scanning Software.

And if you’re a developer, you will get the AvePDF REST APIs on PassportPDF, and the component in GdPicture.NET (desktop) and DocuVieware (web) toolkits.


Elodie & Rémi

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Do you need help to manage your electronic documents?

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