Merge PDF

Combine two or more PDF files into a single document. Files are processed directly in your browser and are not uploaded to any server.

Choose PDF files or drag them here

Select two or more PDF files to combine into one document. The original order of pages within each file is preserved.

Select at least two PDF files to merge.

About the merge PDF tool

The merge PDF tool combines two or more PDF documents into a single file. It is intended for everyday tasks such as combining invoices, joining scanned pages, or assembling several shorter documents into one longer file for sharing or archiving.

All processing happens in your browser using JavaScript. When you select files and click merge, the files are read directly from your device, and the combined result is generated and downloaded from the same browser session. Your files are not uploaded to any server.

This approach has practical advantages. There is no waiting time for uploads, no server side copies of your documents, and the tool remains usable even on a slow connection once the page has loaded.

How to merge PDF files

Using the tool takes only a few steps.

Select two or more PDF files from your device.
Review the list to confirm the files and their order.
Remove any file you do not want to include.
Click the merge button to combine the files.
Download the combined PDF from your browser.

The files are combined in the order they appear in the list. Each file's pages are added in their original order, so the first file's first page becomes the first page of the combined document, and so on.

How merging works

A PDF file is made up of pages, and each page is stored as a collection of objects. When two or more PDF files are merged, the tool reads the page structure of each file in turn and adds those pages to a new document, preserving the content of each original page.

Text, images, vector graphics, and most embedded elements are preserved during this process. The merge does not re render pages, which means the visual content of each original page remains the same.

Some elements, such as interactive form fields, JavaScript, or certain annotations, may not be preserved in every case, particularly if they refer to resources that are defined at the document level rather than the page level.

Practical uses

Combining several scanned documents into one file.
Joining monthly statements, invoices or receipts into a single archive.
Assembling separate chapters of a report into one document.
Merging application forms, attachments and supporting documents.
Grouping related PDFs before emailing or uploading them.

The tool is designed for common, everyday merging tasks. Very large or unusual PDFs may be slower to process and, in rare cases, may not merge cleanly if they contain non standard features.

Limitations

Encrypted or password protected PDFs may not merge.
The order of the original files must be set manually in the file list.
Page level rotation or cropping is not applied during merging.
Form fields, bookmarks and some interactive features may not transfer.
Very large files may be slow to process on devices with limited memory.

If a document contains protected content or unusual features, open it in a trusted PDF reader and inspect the result after merging.

Frequently asked questions

Are my files uploaded to a server?

No. The files are read directly in your browser and processed with JavaScript. They are not sent to any server.

How many files can I merge at once?

There is no fixed limit, but combining a very large number of files or very large individual files may be slow. Using a desktop computer is generally smoother than a phone or tablet for large merges.

Will the page order be preserved?

Yes. The pages within each file keep their original order. The order of the files themselves is determined by the list shown in the tool, which reflects the sequence in which you selected them. You can remove a file and add it again to change the order.

Can I merge password protected PDFs?

Password protected PDFs are usually not supported. Remove the password protection first in a trusted PDF reader, then try again.

Are bookmarks and form fields preserved?

Page level content such as text, images and vector graphics is normally preserved. Document level features such as bookmarks and interactive form fields may not transfer, since they are not part of the individual pages being combined.

Is the tool free?

Yes. The merge PDF tool is free to use and does not require an account or registration.

Important information

This tool is provided for general informational and personal use. It performs PDF merging in your browser and does not provide legal, financial or professional advice.

Always keep an original copy of any important file before processing it. Although merging is designed to preserve content faithfully, PDF processing always involves rewriting the file structure, and rare cases of incompatibility can occur with unusual or non standard documents.