Merge PDF
Combine multiple PDF files into a single document.
Merge order
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Bring pages together in the order you want. A practical flow for sharing, archiving, or sending.
Get your PDF work done quickly and easily.
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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 never uploaded to our servers. 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
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.
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.
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.
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.
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.
If the source files are large, compress each one first; the merged PDF inherits the input sizes, so trimming up front keeps the result manageable.
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?
- There is no fixed cap — the real limit is your browser's available memory. In practice, bundles of around 50 files or 500 MB total run comfortably in any modern desktop browser.
- Will the merged PDF be larger than the originals?
- The merged file is roughly the sum of the inputs. We don't apply any extra compression so quality and content are preserved. If you need a smaller file, compress each PDF first and then merge.
- Does merging hurt the quality?
- No. Pages are not re-rendered or rasterized. Existing text, vector graphics, form fields and hyperlinks all keep their original fidelity in the merged file.
- 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?
- Correct, they really aren't. Your PDFs are opened, merged and prepared for download right inside the browser memory of your device. Not a single byte of file content is sent to our servers — you can verify it yourself by checking the network tab in your browser's developer tools.