Ultra PDF Merger is a freeware PDF utility that joins your PDF files, or part of them, together. It is a windows application and it runs on both 32bit and 64bit systems. Ultra PDF Merger is portable which means you don’t have to install anything, just download it, extract its content and run it. In this way you can put it in your USB drive and use it anywhere. It runs on every system that has .NET Framework 4.0 including Windows 8.

How to use it

  • Add files: You can add the file(s) you want to merge using the Add button. You can select multiple files to add if they are in the same folder. Do not add locked or password protected files because merging will fail. You can also add the same file more than once.
  • Remove files: Select the file you want to remove from the list and press the Remove button.
  • Change file order: Select the file you want to move and move it by pressing the Move Up (Up arrow) or Move Down (Down arrow) buttons.
  • Select specific pages to merge: If you want to merge specific pages from the file change the from and to numbers. If you leave 0 the program will ignore it.

    • From 0 To 0 will merge all the pages of the file
    • From 0 To 10 will merge the first 10 pages
    • From 3 To 5 will merge pages 3, 4 and 5
    • From 3 to 0 will merge all pages except the first 2
  • Select merge type: You can select either normal merge or chapter mode merging which will put each file to start from an odd page number by inserting an empty page if needed.
  • Merge files: Press Merge Files… button to merge selected files.
  • Merge files to first PDF: Press Merge to First button to merge selected files to the first PDF file.
  • View program info: Press About button to view program info such as the version number.

What’s new in version 1.3.10

Added sort functionality to UltraPDFMerger after request. Both file name and file path columns are now sortable. If someone wants to sort, either ascending or descending, he can do it by clicking the column header.

What’s new in version 1.3.9

Added support for forms, now Ultra PDF Merger copies the form information to the merged file.

What’s new in version 1.3.8

There was an issue with rotation in some pages. Rotation of 180 and 270 degrees was not handled correctly. The rotation issue is fixed in this version. Thank you for the ones pointed out the issue, it was the first issue found and reported since Ultra PDF Merger was released!

What’s new in version 1.3.7

The changes of version 1.3.7 are mostly from requests from users. First of all, Ultra PDF Merger is now less sensitive when opening files since there were users that owned the files but files required owner password to open and application was blocking them from merging them. The responsibility of that is now moved to the users and not the application. A second option is added to merge, “Merge to First” now merges all the content to the first PDF file in the list. Don’t worry, if there is a failure it will not affect the original file, it is replaced only when the merging was successful. Also, some users open files from one location and save to another. The application was saving the last location of any action and the users had to navigate to the folders. In this version the application saves the last location of open and save operations separately.

What’s new in version 1.3.5

In version 1.3.5 there are several internal changes such as checks and validations. The most important feature is the “Chapter Mode” merge type. A new button added and by default it says Normal Merge, if you click it, it turns into Chapter mode and every document in the list starts from an odd page number. This is achieved by inserting an empty page when needed. Also, the icon of the application is changed in order to be modern.

What’s new in version 1.3.2

In version 1.3.2 there is a new button to clear file selection (remove all files). Drag and drop functionality is also added to this version. You can now drag the PDF files from explorer and drop them to Ultra PDF Merger for easier file selection.

What’s New in version 1.3

There are two changes in this version. The most important is that you can choose the pages you want to merge by choosing the starting and the ending page. The second change is that the check for two or more files has been removed. You now have the option to “merge” only one file.


This screenshot is from version 1.3.10 which shows the sort functionality added to Ultra PDF Merger in both File Name and File Path columns of the grid.

UltraPDFMerger sort functionality

This screenshot of version 1.3.5 was taken in Windows 8 64bit. It shows all the buttons/features of Ultra PDF Merger.

Ultra PDF Merger v1.3.5

The following screenshot of version 1.3 was taken in Windows 7 environment and may differ in your system. Also the title bar has black and white because the background image is a tiger (from tiger and dragon).

Ultra PDF Merger Page Selection


Windows XP, Vista, 7, 8, 8.1, 10

.NET Framework 4.0 (Windows 8, 8.1 and 10 already have .NET Framework)


The download file is an archive file (.zip), extract its content and start merging.

The download files of the previous versions are rar archive files (.rar) and you will need WinRAR or 7-Zip to extract their content.

Ultra PDF Merger v1.3.10 (1.28 MB)

Older Versions

Ultra PDF Merger v1.3.9

Ultra PDF Merger v1.3.8

Ultra PDF Merger v1.3.7

Ultra PDF Merger v1.3.5

Ultra PDF Merger v1.0


Ultra PDF Merger FindMySoft AwardFindMySoft reviewed and rated Ultra PDF Merger with 5 out of 5. Visit them to read the review or watch the quick video they created.

Ultra PDF Merger v1.3.10 has been released

41 thoughts on “Ultra PDF Merger v1.3.10 has been released

  • November 24, 2011 at 16:12


    On windows XP, I cannot select more than one file in the application. It will be fine to be able to remove all the files with one click.

  • November 24, 2011 at 16:32

    Hi bob, Ultra PDF Merger allows you to select only one file at a time, under all operating systems.
    Yes, multiple selection could make deletion easier but limitation was added due to file ordering.
    I will add the option to remove all files to the next version.
    For now you can close and reopen the application.

  • December 18, 2011 at 17:44

    I would love to be able to drag and drop files to be merged. Will that come in future versions?

  • December 18, 2011 at 20:04

    It sounds very useful. I will add this functionality to the next version.

  • December 26, 2011 at 08:29


  • January 2, 2012 at 00:40

    The next version of Ultra PDF Merger will be released within the next two weeks. Users will be able to add files with drag’n’drop. Also there will be a button that clears all the files and you will not have to delete them one at a time or reopen Ultra PDF Merger.

  • January 14, 2012 at 20:09

    Ultra PDF Merger 1.3.2 is out!
    Read above for what is new in version 1.3.2.

    If you have any requests leave a comment.

  • April 29, 2012 at 11:37

    Sincere thanks for a stunning product Michalis.
    Warm rgds,

  • June 14, 2012 at 17:10

    For some reason our PDFs are being merged upside down with version 1.3.2… Any idea why?

  • June 15, 2012 at 11:25

    Ultra PDF Merger takes all options from the original PDF.
    Version 1.3.2 did not change the way it merges PDF files.
    Provide me a link with your file and I can check it.

  • July 8, 2012 at 17:52

    finally I uninstalled adobe acrobat from my laps… really liked your product …great software …small size and easy to use…thanx for such a software michalis… wish you a very good and healthy life ahead .. regards ..Sukarma Nepali … from the land of Buddha and Mt. Everest.

  • December 13, 2012 at 11:58

    Thank for useful tool!

  • March 25, 2013 at 17:10

    Many thanks ^^

  • September 21, 2013 at 17:57

    Excellent application. Thank you

  • January 19, 2014 at 13:29

    They are false positives. I obfuscate the source code (using Confuser) and those antiviruses are confused because they don’t find the pattern they are looking for.

  • January 20, 2014 at 19:08

    Not feeling good about the virus warnings.. but ok.
    Why not go open source if the program is free?

  • January 22, 2014 at 08:28

    Who does?! But outdated (or bad) engines and algorithms are giving false positives.
    There are two very different things. I wanted to give it for free but I didn’t want to share the code.
    Now, I started to thinking about it again, I am planning to change the entire interface to a new technology and maybe make it open source.

  • March 5, 2014 at 22:04

    Hello Michalis . . .
    First of all thank you so much for developing this software. I am a retired person who is putting some stories that I have written over the years into a flip-page binding software with sound . . . and needed to bind my PDF files . . . and then I saw this software. HOWEVER, I have gone through all the steps; i.e., have the software on my desktop, unzipped the file, added all the files I want for this project; but when I click MERGE FILES it brings open my DOCUMENT FILE window . . . so as to have me put a name of the file down . . . and after I type the name of the file and click SAVE . . . bango . . . an immediate little window comes up saying, “AN ERROR OCCURRED WHILE MERGING THE FILES.” Any suggestions as to what I am doing wrong? I am sure that I have the .NET framework because I re-installed it.

  • March 6, 2014 at 01:01

    Hello . . . RISH again . . . I was just thinking; for people like me (64 and an X-blonde), it would be SUPER if you included in your software a HELP menu that included “THE STEPS TO TAKE TO HAVE UltaPDF MERGER WORK.” When I used it I was thrilled because it loaded my PDF’s as I chose them, one at a time. But, once it gave me the error message, “An error occurred while merging the files,” I didn’t know what to do next. I first checked to make sure that all the files I loaded were PDF . . . and they were . . . then I made sure that I had the NET file, and I do; so, now . . . anxious to move forward in my project, I knew nothing else to do but send you an email and ponder on what I could have done wrong . . . while I wait for your reply.

    Thanks for all your time,
    Rish from Salem, Oregon
    March 5th, 2014; Wednesday: 2:57 p.m.

  • March 7, 2014 at 00:02

    Hi Rish, it is not .NET problem. If the framework is missing, the software doesn’t start at all.
    It seems that one (or more) of your PDF files is used by another program or it is protected.
    I will add the help button on the next version, so far ‘About’ was redirecting to this page.
    Future version will indicate the locked and password protected files after loading.

  • March 26, 2014 at 16:19

    Hello Michalis…
    I have downloaded the last file(Ultra PDF Merger v1.3.5 ).
    But little window still came up saying β€œAN ERROR OCCURRED WHILE MERGING THE FILES.”
    I am sure my files have no any restrictions after I checked it.(I used PDFUnlock!)
    What can I do?Could you help me?
    Thank you very very much.

  • March 26, 2014 at 20:24

    Hi Cristine, if files are fine make sure they are not used by other software.
    For example, if you open a PDF in Windows 8 you have to specifically close it or else it stays open and other programs can’t use it.
    Also, make sure you didn’t delete itextsharp.dll and it is in the same folder with Ultra PDF Merger.

  • March 26, 2014 at 23:16

    Dear Michael,

    I would like to thank you for your program. It is a very useful, light and very easy to use program.

  • March 27, 2014 at 11:12

    I will try it. Thank you for everything. πŸ™‚

  • February 15, 2015 at 23:29

    your Ultra PDF Merger is fantastic.
    I would like to ask, if you are developing this app yet?
    I have a few ideas:

    1) drag and drop reordering files in list
    2) when droping new file into a list, file is inserted at the end of the list. I think, it will be better to place file in pointed position (may be with shift pressed)
    3) sometimes, there is a rule for naming final pdf file. I am using name of first merged file … so some mask game (name of first file, last file, include, exclude, name of parrent directory, auto increasing counter?
    4) favourites folders for target file (in ribon … )

    Thanks for you reply …


  • February 16, 2015 at 01:06

    Hi Martin,

    Thank you. I like your ideas and I will integrate (most of) them in the next versions. I don’t have much free time so it will take some time. I hope in two months to be able to release the new version.


  • October 24, 2016 at 19:35

    Thanks for the great software! The only thing that doesn’t seem to be working for us is that it doesn’t seem to retain form information once we merge. Is there a way I can send you a couple of sample files to show you what I’m talking about?

  • October 31, 2016 at 22:58

    Ultra PDF Merger version 1.3.9 with PDF form support is now available for download

  • March 20, 2017 at 17:58

    Hi Michalis,

    I love this software it has been a great help! I noticed when i merge pdfs with bookmarks in them it erases them. Is there a way to prevent this from happening?

  • March 22, 2017 at 22:31

    Hi, I am glad you find Ultra PDF Merger helpful. Send me a sample file with bookmarks, I’ve already sent you an email.

  • October 2, 2017 at 15:51


    Since Friday (29th September 2017) Ultra PDF Merger is being detected as “Win32/Rundas.B”. It’s also starting to show up on

    Can you explain what’s going on?


  • October 4, 2017 at 17:18

    Hi Andrew, there are only two reasons, either the site was hacked and the files were altered or false positives. I downloaded and checked the files and they are the original, with the same CRC. This leaves the false positives, there were some also in the past. Maybe there was an update on one of the antivirus scanners and it recognizes it as a malware. Antivirus scanners are doing a great job but they are not perfect.

  • August 6, 2018 at 03:08

    Hi Michalis,

    Thank you for developing and generously sharing such a simple and useful tool.

    Do you consider any possibility of allowing the dll file to be installed or something like that (like, e. g., moving it to the c:\windows\system32 folder) instead of keeping it in the same folder of Ultra PDF Merger ?

    I mean… is there any way to just indicate to Ultra PDF Merger where to find the dll file ?

    Thank you again. Greetings from Brazil !

  • August 7, 2018 at 19:47

    You are welcome, I am glad you like it. That is not hard to implement so I will consider creating a minor version for this. In the meantime, consider creating a shortcut pointing to the executable.

  • August 16, 2018 at 00:14

    Hi Michalis,

    I figured out this very simple solution just a day after I wrote you. I created the shortcut, but also indicating in which folder should the executable run. And it works just fine.

    I guess it wasn’t a good idea of mine. Don’t waste your time on it !

    Maybe you could just give this tip in the next version. There is no need to write any code for this.

    Thank you again. More greetings from Brazil!

    Bye !

  • December 15, 2021 at 02:28

    Hi Michalis,

    I love Ultra PDF Merger 1.3.9, but I have some suggestion, can you develop sort by name function??
    when I import multi pdf file (about 100), they is ordered by name, but if I want to reorder it, I only click in “Move Up”, “Move Down” button, it’s to slow.

    Thank for your software.

  • December 20, 2021 at 07:11

    Hi Luan, I will consider adding the sorting function, please check this post in about a week.

Leave a Reply

Your email address will not be published. Required fields are marked *