Last updated on
Sep 20, 2025
Merge large PDF files For Free
Drop document here to upload
Up to 100 MB for PDF and up to 25 MB for DOC, DOCX, RTF, PPT, PPTX, JPEG, PNG, JFIF, XLS, XLSX or TXT
Note: Integration described on this webpage may temporarily not be available.
0
Forms filled
0
Forms signed
0
Forms sent
Discover the simplicity of processing PDFs online
Upload your document in seconds
Fill out, edit, or eSign your PDF hassle-free
Download, export, or share your edited file instantly
Top-rated PDF software recognized for its ease of use, powerful features, and impeccable support
Every PDF tool you need to get documents done paper-free
Create & edit PDFs
Generate new PDFs from scratch or transform existing documents into reusable templates. Type anywhere on a PDF, rewrite original PDF content, insert images or graphics, redact sensitive details, and highlight important information using an intuitive online editor.
Fill out & sign PDF forms
Say goodbye to error-prone manual hassles. Complete any PDF document electronically – even while on the go. Pre-fill multiple PDFs simultaneously or extract responses from completed forms with ease.
Organize & convert PDFs
Add, remove, or rearrange pages inside your PDFs in seconds. Create new documents by merging or splitting PDFs. Instantly convert edited files to various formats when you download or export them.
Collect data and approvals
Transform static documents into interactive fillable forms by dragging and dropping various types of fillable fields on your PDFs. Publish these forms on websites or share them via a direct link to capture data, collect signatures, and request payments.
Export documents with ease
Share, email, print, fax, or download edited documents in just a few clicks. Quickly export and import documents from popular cloud storage services like Google Drive, Box, and Dropbox.
Store documents safely
Store an unlimited number of documents and templates securely in the cloud and access them from any location or device. Add an extra level of protection to documents by locking them with a password, placing them in encrypted folders, or requesting user authentication.
Customer trust by the numbers
64M+
users worldwide
4.6/5
average user rating
4M
PDFs edited per month
9 min
average to create and edit a PDF
Join 64+ million people using paperless workflows to drive productivity and cut costs
Why choose our PDF solution?
Cloud-native PDF editor
Access powerful PDF tools, as well as your documents and templates, from anywhere. No installation needed.
Top-rated for ease of use
Create, edit, and fill out PDF documents faster with an intuitive UI that only takes minutes to master.
Industry-leading customer service
Enjoy peace of mind with an award-winning customer support team always within reach.
What our customers say about pdfFiller
See for yourself by reading reviews on the most popular resources:
I had a very good experience with customer service when I wanted to cancel. I did not realize that there was a form available for no charge. This was a one time thing since in my line of work I really don't utilize this type of service. For those that do, it is a valuable tool
2014-10-14
The UI is outstanding and very effortless. Very impressed.
My only issue was with advanced features. Would have liked to know ahead of time that they were additional fee. Everything looks included and don't like being told something cost money after the fact. Second, when telling me I had to upgrade to get additional feature, it should show the difference between what I am paying verses the new amount. I was on personal plan ($6) but to get the features I needed it was ($10). It said it was $10 for advanced plan but I didn't know if that meant $10 MORE than I was already paying. I had to open site in incognito mode, look at plans to figure it out... not fun.
Lastly, I was trying to send 2 separate PDFs as one doc. It took me a while to figure out where Merge was. I didn't understand why all the options under Actions were greyed out. That was very frustrating and should be improved.
2016-07-16
Program is a time saver for me.
Plus my reports have a more professional appearance.
I would not want to go back to doing it the old way.
Thank you PDFfiller!
2017-01-19
Great Product And Support
I have used pdFiller for several years and loved the product. It is a great product and great value as well. I only had to deal with customer support once and had a 10+ experience. Sally was terrific. I would recommend this product to anyone who deals with a lot PDF files. And the customer service is #1.
2024-11-29
Excellent support and customer service I registered for an annual membership, but I didn't pay attention that the membership fee is calculated in US dollars. I live in ****** and it was expensive for me. I emailed support department to cancel my membership and they responded in less than an hour and sent me a full refund.I appreciate the excellent customer service and proper support, polite and professional behavior of the staff.
2023-07-02
Outstanding customer service, communication and efficiency!! I highly recommend. They are one of the best, if the THE best company I've ever dealt with!
2022-02-02
What do you like best?
The ability to edit almost any part of a pdf has saved me on countless hours of retyping a document for one minor change. The interface is very easy as well
What do you dislike?
The only improvement I would like to see is the ability to remove sections (cut) and move others into the opening. I may be a novice and this ability does exist, but if it does not, I personally would find it beneficial
What problems are you solving with the product? What benefits have you realized?
I am able to correct sentances, paragraphs or simply small typos. The ability to adjust those without redoing an entire document is an amazing benefit.
2021-02-12
Easy to import edit
Easy to import edit- wished I had this a long time ago! I was desperately trying to find a way to send my Doctor forms. Scanner/Printer was knocked out from the storm.
2020-07-23
It's been great. I switched over to you guys from another pdf editer that would constantly crash. I had it then found you guys. No crashes, very satisfied
2024-12-20
Merge Large PDF Files Feature
Our Merge Large PDF Files feature allows you to combine multiple PDF documents into one cohesive file. Whether you manage reports, presentations, or invoices, this tool simplifies the process significantly.
Key Features
Combine up to 50 PDF files in a single action
Drag and drop interface for easy file management
Maintain original formatting across all merged documents
Fast and secure processing with no file size limits
Cross-platform compatibility for use on any device
Potential Use Cases and Benefits
Organize project documents into one file for easier sharing
Create comprehensive reports from multiple sources
Simplify document submission processes for clients
Reduce email clutter by sending a single PDF instead of many
Improve collaboration by consolidating feedback and revisions
By using our Merge Large PDF Files feature, you eliminate the hassle of managing several documents. Instead of searching through multiple files, you can work with one document that contains everything you need. This solution saves you time, decreases the potential for errors, and enhances your workflow.
How to Merge Large PDF Files with pdfFiller
Merging large PDF files can be a breeze with pdfFiller's Merge feature. Follow these simple steps to combine multiple PDF files into one:
01
Log in to your pdfFiller account. If you don't have an account yet, you can easily create one for free.
02
Once you're logged in, click on the 'Merge' tab at the top of the page.
03
Click on the 'Add Files' button to select the PDF files you want to merge. You can choose multiple files by holding down the Ctrl key (or Command key on Mac) while selecting them.
04
Arrange the order of the files by dragging and dropping them into the desired sequence. You can also remove any unwanted files by clicking on the 'X' button next to their names.
05
If needed, you can click on the 'Settings' button to adjust the settings for the merged PDF file. Here, you can choose the orientation, page size, and margins.
06
Once you're satisfied with the file order and settings, click on the 'Merge' button to start the merging process.
07
Wait for the merging process to complete. This may take a few moments depending on the size of the PDF files.
08
After the merging is done, you can download the merged PDF file to your computer or save it directly to your pdfFiller account.
09
Congratulations! You have successfully merged large PDF files using pdfFiller's Merge feature.
With pdfFiller, merging large PDF files has never been easier. Start combining your PDFs today and streamline your document management process!
#1 usability according to G2
Try the PDF solution that respects your time.