10 Best PDF Merge Tools – Combine PDFs Online for Free

Choosing the right PDF merge tool is about finding one that fits your needs. If you just need basic merging, start with free tools. If you want extra features, try a 14-day trial or a basic monthly plan.

Whether it’s invoices, IDs, bank statements, or other documents, our blog lists the top 10 PDF merge tools to help you pick what’s best for your business today!

#1. KlearStack

KlearStack AI can turn your minutes into seconds—by merging multiple PDFs effortlessly. What makes this tool stand out is its use of AI technology to extract data from any document (unlike other softwares), thus eliminating your need for templates during setup.

The list of documents KlearStack can process are:

  • Invoices
  • Bill of landing
  • ID cards
  • Receipts
  • Purchase orders
  • Credit notes
  • Packing list
  • Insurance policies
  • Legal documents
  • Delivery notes
  • Bank statements
  • Annual reports
  • NACH Mandate
  • Merchant onboarding
  • Marksheets

From drag & drop, custom page order and quality assurance—KleaStack possesses a range of features—that allows you to efficiently organize, review, share, and email documents with ease.

Steps to Merge PDF Files with KlearStack?

  • Upload or drag and drop the PDF directly onto the designated area.
  • Arrange PDFs as per your desired order and click “”Merge.”
  • Finally, click “Download” to save or share the merged PDF.

Here’s what you can expect from KlearStack’s PDF merge tool:

Drag and Drop Interface
Custom Page Order
Multiple file Integration
File Preview
High Quality Results
Privacy Assurance
Cross-Browser Compatibility
User-Friendly Interface

Pricing: Pricing varies between standard, premium and enterprise plans.

  • Standard: 10,000 to 100,000 Pages/Year.
  • Premium: 100,000 Pages/Year.
  • Enterprise:1 Mn+

Easy setup, cancel anytime. Choose your plan.


  • Best AI driven OCR with 99% accuracy
  • Expect cost savings of upto 70%
  • Requires no templates making setup quick and hassle-free.
  • Save 1000s of hours of manual effort and cost.

User Satisfaction: 5.0

#2. Soda PDF

Soda PDF, recognized for its online popularity, also offers a desktop version for offline use. Notably, it seamlessly integrates with Google Drive and Dropbox, providing users with added convenience for file storage.

Upon adding PDFs, the tool facilitates effortless rearrangement, allowing users to customize the order. It preserves the original dimensions and orientation of PDF pages. Additionally, the PDF Split tool empowers users to eliminate unnecessary pages from the original document.


  • Merge multiple PDFs at once with options for bulk import.
  • Connects with Dropbox and Google Drive for straightforward file storage and retrieval.
  • Maintains original dimensions and orientation of PDF pages.
  • Provides a tool for splitting PDFs as needed.
  • Accessible both online and offline.


  • Has restrictions on storage space and daily usage.
  • Using online tools involves uploading files to the internet, raising potential security concerns.
  • You might experience stability concerns, thus questioning the reliability of the tool.


  • Pro: US$52.88/Year
  • Standard: US$105.89/Year

#3. Adobe Acrobat

Adobe Acrobat, a seasoned PDF merger, goes beyond simple file combination, streamlining document management. With this tool, merging PDFs is just the beginning; you can effortlessly fine-tune documents by removing, rotating, arranging, inserting, and replacing pages to meet your specific needs.


  • Merge PDFs, Word, Excel, web pages, audio, and video into a single PDF, covering various file types.
  • Quickly identify and categorize pages using thumbnails for smoother navigation.
  • Drag-and-drop functionality, making merging a breeze.
  • Access advanced features for PDF editing, conversion, and organization.


  • Could be a pricey choice
  • Loading PDFs might take longer
  • Might be a bit complex for those wanting a straightforward solution.

Pricing: US$239.88/Year

#4. Combine PDF

This online PDF merger tool simplifies the merging of up to 20 PDF or picture files into a single document, providing users the flexibility to rearrange pages as needed. Notably, it emphasizes user security by automatically deleting all uploaded or generated file data after an hour.

Combine PDF Online stands out for its versatility, allowing users to merge PDF files seamlessly, regardless of their original format—whether DOC, JPEG, or PNG. Beyond merging, the tool excels by offering a diverse set of functions, including PDF conversion, creation, compression, rotation, and unlocking.


  • You can access a free version for basic merging needs.
  • Supports various features like unlocking, compressing, converting PDFs, and more.


  • Limited features
  • Allows merging only up to 20 files at a time.
  • You may encounter a notable number of ads while using the tool.

Pricing: Free

#5. ILovePDF

iLovePDF provides the convenience of merging PDFs through both online and offline methods. After the merger, users enjoy flexibility by being able to rotate and reorganize files alphabetically, in reverse, or using a custom drag-and-drop arrangement before exporting.


  • Easily rotate PDFs before merging, providing additional customization.
  • Link with Google Drive and Dropbox for efficient file import & storage.


  • Limited free version
  • Fewer desktop features compared to online version
  • Lacks advanced features that could be found in other tools.

Pricing: $48/Year

#6. SmallPDF

Smallpdf serves as a convenient one-time solution for those in need of an online PDF joiner. In addition to merging, it provides features like document type conversion, PDF signing, and document security.

Utilizing SmallPDF’s thumbnail view, users can effortlessly drag and drop files to reorganize PDFs. The tool allows for the selective removal of specific pages during the merging process, offering customization. Furthermore, after merging, users can directly save the resulting file to Dropbox or Google Drive.


  • Povides tools for converting various document types.
  • You can delete individual pages during the merging process.


  • Many features require an upgrade to the paid subscription.
  • The free version limits users to processing up to 2 documents per day.

Pricing: Free

#7. PDFSam Basic

PDFSam Basic stands as both a merger and splitter, providing flexibility in combining single pages, customizing page ranges, or merging entire PDFs, akin to other PDF converters. This program enhances the merging process by allowing users to drop existing bookmarks and add new ones, contributing to the organization of combined PDF documents. Furthermore, users can improve navigation by adding a table of contents.

PDFSam Basic goes beyond basic merging, enabling users to rotate PDFs, mix pages alternatively from different PDFs, and split PDFs based on criteria such as predetermined pages, after every page, by size, or bookmark. This tool offers a comprehensive set of features for versatile PDF manipulation.


  • Enables the rotation of PDFs before merging, providing customization.
  • Facilitates better document navigation by allowing the addition of a table of contents.
  • Offers varied splitting options.
  • Supports merging different types of PDFs for enhanced flexibility.
  • Allows for the selective merging of specific parts of PDF files.


  • Requires Java to run the application.
  • Lacks advanced editing features.
  • Doesn’t offer advanced features typically found in more comprehensive PDF tools.

Pricing: Free

#8. PDF Converter

PDF Converter provides an ideal online solution for merging PDF files, Word documents, images, and more through a straightforward conversion process. Users can effortlessly rearrange files using a simple drag-and-drop feature. Additionally, the tool offers the option to compress newly created PDFs, contributing to efficient space management on the computer.


  • Quickly merge PDFs, word documents, and images through a user-friendly conversion process.
  • Easily reorganize files by dragging and dropping.
  • Supports merging files with different formats.


  • Allows only one free merging every hour.
  • Dedicated customer service is available only with a premium subscription.

Pricing: Free

#9. DocuPub Online PDFmerge

DocuPub, with its straightforward web application, excels in simplifying the document merging process, although it may lack some advanced features present in competitors. Users can seamlessly upload common file types like Microsoft Word, Excel, and PowerPoint for merging. It’s crucial to keep in mind that individual files uploaded should not exceed 20 megabytes in size while utilizing this tool.


  • Supports the merging of multiple file formats, including Microsoft Word, Excel, and PowerPoint.


  • Individual files for merging must not exceed 20 megabytes in size.
  • You may find concerns regarding the safety and stability of using this online service.

Pricing: Free

#10. Apple Preview

Apple Preview stands out as a prominent PDF merge solution for Mac users, providing the advantage of being both free and pre-installed on all modern Macs.

While it may not boast the extensive features of competitors like Adobe Acrobat or Nitro PDF Pro, Apple Preview shines with its elegant PDF merger and seamless combination options. Regarded as one of the best PDF readers on Mac, it offers powerful editing functions that meet the needs of most PDF tasks.

Despite some limitations in PDF editing, such as the absence of text editing capabilities, Apple Preview excels in tasks like reordering, rotating, and removing pages. For Mac owners seeking a swift and efficient PDF file merger, Apple Preview proves to be a convenient choice.


  • Is free and built by Apple
  • Comes preinstalled on Mac, ensuring widespread accessibility.
  • Offers tools for merging, annotating, and signing PDF files.


  • Lacks OCR functionality.
  • Falls short of being a complete PDF editor like Adobe Acrobat.

Pricing: Free

Comparative Analysis of 10 PDF Merge Tools: Pricing, Systems, and Ratings

PricingSystemUser Ratings
KlearStackStandard: 10,000 to 100,000 Pages/Year. Premium: 100,000 Pages/Year. Enterprise:1 Mn+Windows, Mac, iOS, and Android5.0
Soda PDFPro: US$52.88/Year Standard: US$105.89/YearWindows, iOS, and Android (No Mac version)4.0
Adobe AcrobatUS$239.88/YearWindows, Mac, iOS, and Android4.8
Combine PDFFreeWeb3.2
ILovePDF$48/YearWindows, Mac, iOS, and Android3.2
Small PDFFreeWeb4.2
PDFSam BasicFreeWindows, Mac, Linux3.0
PDF ConverterFreeWeb3.0
DocuPub Online PDF MergeFreeWeb3.1
Apple PreviewStarting Price: FreeMac4.0

Criteria for Choosing the Best PDF Merge Tool for Your Business

When considering a suitable PDF merge solution for your business, it is essential to check through factors like editing capabilities, integration, and your budget.

Thus, ask yourself the following questions:

  • Which editing features, such as rotating pages or adding bookmarks, do I need for customizing documents according to my business requirements?
  • Can the PDF merge tool integrate with my preferred cloud storage services like Google Drive or Dropbox?
  • How efficiently does the tool handle large documents? Can it minimize my workflow disruptions?
  • Does the pricing model, whether it’s a one-time payment, subscription plan, or free version, match my budget and usage needs?
  • Can I use the PDF merge tool offline, or does it provide desktop versions for uninterrupted access, especially when working without an internet connection?

These questions let you assess your business needs and make informed decisions when selecting a PDF merge tool that aligns with their specific requirements.

Ready to Merge 1000+ Documents without Sparing Time?

KlearStack is your ideal PDF merge solution with a friendly user interface and integration capabilities that can suit any and every business needs.

Cut costs upto 70% and attain 99% accuracy within seconds.

FAQs on PDF Merge Free Tools

How can I merge PDFs for free?

Merge PDFs for free with KlearStack’s user-friendly tool. Simply upload your files on KlearStack’s Merge PDF tool. Arrange them as needed, and download the merged PDF.

How can I merge PDFs together?

Combine PDFs effortlessly with KlearStack’s free tool. Upload your PDFs, arrange their order, and receive the merged document in seconds.

What free tools can merge PDF files?

KlearStack offers a free PDF merging tool, simplifying the process. Merge multiple PDF files, arrange them and obtain the merged document quickly, all at no cost.

Which app can merge PDFs?

KlearStack’s app allows you to merge PDFs effortlessly. Upload your files, arrange them with ease, and obtain your merged PDF conveniently via this user-friendly application.

In what order will my merged PDF files appear?

Merged PDFs appear in the order you arrange them during the merging process. Customize the sequence of your documents for your specific needs.

How many pages can I include in a merged PDF?

You can include as many pages as you need in your merged PDF. There’s no page limit, ensuring flexibility for your documents.

Can I delete and reorder pages after I merge files?

Absolutely, KlearStack allows you to delete and reorder pages in your merged PDF even after the files are combined.

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