PDF Merge Tool

Drag & Drop PDF files here

* Max 20 files, up to 50MB total. Password-protected PDFs are excluded.

Our "PDF Merge Tool" is a completely free, convenient web application that allows you to intuitively combine multiple PDF files into one while previewing them in your browser. There is no need to install dedicated software or purchase expensive PDF editing tools. Anyone can easily consolidate scattered document data into a single file. Whether you are a business professional looking to smartly bundle multiple quotes and invoices to send to a client, a student organizing assignments and scanned materials for submission, or someone managing e-book and manual data, this tool instantly solves the common challenge of wanting to neatly combine PDF files. Simply access it from your computer or smartphone browser to enjoy comfortable PDF merging right now.

✓ Features of this tool

Completely free with no registration required: You can use all features immediately just by accessing the site. There is no need for troublesome account creation or email registration. Without strict usage limits, you can use it freely as many times as you like without worrying about fees or hassle, even when organizing a large number of PDF documents.
Real-time preview of the final merged result: When files are loaded, a "merged completion image (all pages)" is displayed in real-time on the left side of the screen. You can visually confirm which pages will be in which order beforehand, preventing errors and ensuring accurate PDF creation.
Intuitive operation and free reordering: Files can be easily loaded with drag and drop, and you can freely change the order after uploading by dragging items or using the arrow buttons in the right-side list. When the order is changed, the preview on the left updates instantly, allowing for intuitive work.
Supports large capacities and multiple files: You can merge up to 20 files and a total of 50MB of PDF data in a single operation. Even large files like multi-page manuals or presentations with high-quality images are processed smoothly in your browser.
Safe and secure entirely local processing: Utilizing the latest web technology, the file merging process is performed solely within your device (computer or smartphone). Important data is never sent to or stored on external servers, so even highly confidential documents can be processed safely.

Detailed Instructions & Tips

Upload the PDF files you want to merge
First, drag and drop the PDF files you want to merge into the upload area surrounded by a dotted line, or click to select the files. Once loaded, the screen switches to the workspace, showing the "Merge Preview" on the left and the "File List" on the right. If you want to add more files later, press the "+ Add" button at the top right of the list or drag and drop files onto the screen again.
Adjust the order while checking the preview
The order in the right-side file list directly becomes the page order after merging. To change the order, grab the "drag handle (6 dots)" on the left of each item with your mouse and move it up or down, or click the arrow buttons on the right. When you change the list order, it is immediately reflected in the preview screen on the left. Turn pages using the "<" and ">" buttons in the preview to verify the overall structure while making adjustments. Unnecessary files can be deleted with the trash can icon.
Execute the merge and save the file
Check the final result in the preview, and if there are no problems, click the "Merge & Download" button at the bottom right. The merge process starts instantly in your browser, and the newly combined PDF file is downloaded automatically. Open your download folder to check the contents. If you want to start over with different files, press the "Clear All" button at the bottom left to reset.

Built for Security and Privacy

The greatest strength of this tool is that the uploaded PDF files are never sent to an external internet server; the entire preview generation and merging process is completed locally on your computer or smartphone.

Typical free PDF processing sites upload your files to the operator's server first, which leaves security concerns. However, since our site utilizes the processing power of your browser itself to perform the merge, the risk of data being passed to third parties is zero—even for contracts containing corporate confidential information, invoices, or copies of personal ID cards. Your data will absolutely never be saved anywhere or used as training data, so anyone can use it with peace of mind at any time.

Recommended For (Specific Use Cases)

Consolidating business contracts, quotes, and monthly reports

When sending materials to clients via email, having quotes, specifications, and company brochures in separate PDF files forces the recipient to go through the hassle of opening multiple files. By merging these into a single PDF with this tool, you reduce the burden on the viewer and give a smart, professional impression. It is also extremely useful for compiling receipt data for monthly expense reports or monthly reports into a single file for storage and submission.

Organizing personal study materials, scanned documents, and tickets

Consolidating multiple class handouts or certification exam past papers into a single PDF drastically improves learning efficiency on a tablet device. Also, by chronologically combining instruction manuals, insurance policies, travel itineraries, and e-tickets scanned separately on your smartphone or scanner, it becomes much easier to find the information you need in an emergency, making digital data organization significantly smoother.

Frequently Asked Questions (FAQ)

Can I use it from a smartphone (iPhone or Android)?

Yes, you can use it without any problems from smartphones and tablets such as iPhone and Android. It is designed and optimized to work on standard web browsers like Safari and Google Chrome, so there is no need to install a dedicated app. You can easily perform speedy business tasks, like quickly merging multiple PDF documents received on the go on your phone and forwarding them to another person.

Can I merge password-protected PDF files?

No, unfortunately, PDF files with an open password for viewing or with editing restrictions cannot be read due to system specifications, and will be excluded from processing and previewing. To merge them, you will need to prepare files with the password removed beforehand.

What is the maximum number of files and MB of PDFs I can merge?

To maintain browser processing power and stability, we have set a limit of "up to 20 files" and "a total file size of up to 50MB" per process. If you want to merge files or sizes exceeding this limit, please divide the merging process into two or more times, or delete unnecessary pages to reduce the file size before using the tool.

If I mistake the order of uploaded files, can I change it later?

Yes, it's easily changeable. In the list screen displayed on the right after loading files, you can intuitively rearrange the order by dragging and dropping the icon (drag handle) on the left side of each item up and down with your mouse. When you change the order, the preview on the left also updates simultaneously, so you can adjust while checking the final result. You can also reorder by clicking the "Up" and "Down" arrow buttons placed on the right side of each item.