HexxPDF

Merge PDF

Arrange scattered PDF files in your preferred order and combine them into one clean, share-ready document.

Merge order

No files added yet.

No files added yet.

What does this tool do?

PDF Merge is the most practical way to combine several PDF files into a single document. It saves you time whenever you need to send a contract together with its attachments, line up scanned pages from different sources, or hand off a stack of reports as one tidy package.

The HexxPDF Merge tool runs entirely in your browser — your file contents are not uploaded to our servers for the operation. There is no account to create, no app to install, no payment to make. A typical merge finishes in a few seconds and keeps the original quality intact.

It is especially handy for combining documents exported separately from Word, Excel or PowerPoint, packaging a digitally signed contract together with its annexes, or producing the monthly invoice bundle that goes straight to accounting.

How to use it

  1. Pick your files

    Drag your PDF files into the upload area or click "Choose files" to pick them from your device. You can drop several files at once; the order they arrive in becomes the initial merge order.

  2. Set the merge order

    Use the up/down arrows next to each row, or drag and drop to reshuffle the list. The order in this panel is exactly the page order you'll see in the final PDF.

  3. Remove anything you don't want

    Tap the remove button next to a row to drop a file you added by mistake, or use "Clear all" to start from scratch. Nothing is held server-side either way.

  4. Hit the merge button

    Click "Merge PDFs" and the combine job runs locally in the browser. Most merges finish in a few seconds; total time depends on how many and how heavy the files are.

  5. Download the merged PDF

    When it's done, a download link appears. Save the merged file to your device, share it directly, or drop it into your archive folder.

When you'll reach for it

  • Combining several reports, articles or chapters into a single deliverable.

  • Bundling a contract and its attachments into one PDF for the signature workflow.

  • Stitching together documents exported separately from Word, Excel and PowerPoint.

  • Joining individual scanner pages back into a single, properly ordered document.

  • Sending a month's worth of invoices, receipts or bank statements to accounting in one neat file.

Tips and best practices

  • Prefix file names with "01-", "02-" and so on — the merge order then matches your intended sequence right out of the gate.

  • To keep the final PDF size reasonable when working with very large files, review the source files first and reduce the total size by removing unnecessary pages.

  • Unlock password-protected PDFs before merging; otherwise the tool can't read their contents and the job will fail.

  • After the merge finishes, open the file once and check both the page order and the critical content before sharing it.

  • For very large bundles (200 MB and above), prefer a desktop browser over a mobile one — desktop memory management handles the load more reliably.

Frequently asked questions

Which file types are supported?
Right now only PDF is supported directly. For other formats (Word, Excel, JPG and so on) convert them to PDF first using the matching converter, then merge. To turn a stack of images into one PDF, the "Image to PDF" tool is the quickest path.
Can I change the order after I upload?
Yes. Drag and drop the files in the list, or use the up/down arrows to reorder them. The order on this screen is exactly the page order in the merged PDF.
How many PDFs can I merge at once?
We do not set a fixed number limit; the practical limit depends on your browser memory, device performance, and the structure of your files. Performance may vary with many files or packages that are hundreds of MB in size; using a desktop browser is recommended for large files.
Will the merged PDF be larger than the originals?
The output file size is usually close to the combined size of the PDFs you use. No built-in compression is applied; the goal is to collect the pages into a single PDF without trying to reprocess them. If you want to reduce the size, remove unnecessary pages from the source files or optimize the files separately before merging.
Does merging hurt the quality?
Because pages are merged without being rasterized, text, images, and vector content generally keep their original quality. However, some advanced PDF elements, forms, or special links may behave differently depending on the structure of the source file. For this reason, you should review the output after processing.
Can I merge password-protected PDFs?
Not directly. Open the protected file in any PDF reader first, save an unlocked copy, and then merge the unlocked version through HexxPDF.
Does it work on mobile?
Yes. The tool is browser-based, so it runs on iPhone, Android or tablet. With very large files, desktop browsers tend to be more stable because of how mobile processors manage memory.
Are my files really not uploaded?
With this tool, the merge operation runs in your browser. Your files are opened, merged, and made available for download in your browser memory; PDF contents are not sent to our servers for the merge operation.

Related tools