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How to Merge PDF Files

Below we show how to combine multiple PDF files into a single document.

Step 1: Upload your files

Securely uploaded over an encrypted connection. They stay safe and private. Once merged, they are deleted.

Rather not upload your files and work with them on premise?
Use Sejda Desktop. Offers same features as the online service, and the files are processed locally.

Click Upload PDF & image files and select files from your local computer. Folders can be selected too.

Dragging and dropping files to the page also works.

Dropbox or Google Drive files

You can pick PDF files from Dropbox or Google Drive too. Expand the Upload PDF & image files dropdown and select your files.

Scan and Merge to PDF by Email

The easiest way to prepare multiple docs for an online application form. Merge all documents into a single PDF, compressed to a small file size.

  1. Scan documents with your mobile's camera.
  2. Attach them to an email sent to
  3. Get an automated reply with your merged PDF file in seconds.

Images, scans and PDF files are accepted as attachments. Your files stay private and are automatically deleted after being processed. We'll compress the images so your merged PDF is super tiny in size and can be uploaded to your online application.

How to Scan to PDF With Your Mobile Phone's Camera

  1. Scan your documents with your mobile phone's camera
  2. Email files to
  3. Get back a merged & compressed PDF file

Step 2: Reorder your files

Drag and drop the files to change the merge order. Use the sort buttons to sort alphabetically on filenames A-Z or Z-A

Ready to merge your files? Let's go!

Merge PDF files online

Double sided printing

Files with even number of pages break double sided printing of the merged PDF file.

To print well double sided, a blank page can be inserted at the end of files with even pages.

Select the Double sided printing option.

Don't merge all pages

Click More options, then select the Include only specific page ranges option. Specify per file which pages you want. Leave blank to include all pages.

Generate bookmarks or outline

You can customize how the PDF file outline will be merged. There are four scenarios to choose from:

  1. 1. Discard all
  2. 2. Keep all
  3. 3. Discard existing and create new bookmark per file.
  4. 4. Create bookmark per file keeping existing under

How to add filenames to page footer

You would like each page from the merged PDF file to have the original filename in the footer.

Click More options, then select the Add filename to page footer option.

Generate Table of Contents

You would like to have the first page as a Table of Contents, with clickable links that navigate easily to the starting page of each merged file.

You can choose between using the filenames or the document titles in the Table of Contents.

Click More options, then select the Based on file names or Based on document titles options in the Table of Contents section.

Flatten Form Fields

Your PDF files contain form fields. You'd like to flatten them so the filled in values remain visible in the document but the fields are no longer editable.

Click More options, then select the Flatten option in Form Fields section.

If more of your merged files contain PDF forms, then you might be interested in either merging the form fields or discarding the fields completely from the result. Both options are available, including a merge flavour which preserves duplicate fields by renaming them.

Reordering or alternating pages

Need to reorder the pages of the merged file? Have a look at Visually combine and reorder PDF

Want mixed pages that alternate between the two files? See Alternate & Mix PDF

Step 3: Download results

Click Download to save the merged PDF file to your computer.

For peace of mind, delete your files. Click the Delete files button.

Save to dropbox

You can save the merged file to Dropbox. Expand the Download dropdown and choose Save to Dropbox

Ready to merge your files? Let's go!

Merge PDF files online