Merge PDF Files
Combine two or more PDFs into a single document in seconds. Everything happens in your browser — your files are never uploaded anywhere.
Select several at once, or add more files afterwards
When do you need to merge PDFs?
Combining PDFs comes up constantly: joining a cover letter and résumé into one application file, stitching scanned pages back into a single document, assembling invoices or receipts for an expense report, or bundling several signed forms into one attachment because a portal only accepts a single upload. Instead of installing desktop software or trusting a random upload site with private paperwork, this tool joins the files locally on your own device.
| Scenario | Typical order |
|---|---|
| Job application | Cover letter → résumé → certificates |
| Expense report | Summary sheet → receipts in date order |
| Scanned document | Pages in reading order (check for upside-down scans first) |
| Contract package | Main contract → appendices → signature pages |
Why the order matters
The merged PDF simply places every page of the first file, then every page of the second, and so on. There is no way to reorder pages after merging without splitting the file again — so it's worth a few seconds to arrange the list before you click merge. Use the ↑ and ↓ buttons next to each file to move it, and ✕ to remove one you added by mistake. The page count shown next to each file helps you confirm you picked the right version.
Frequently asked questions
Are my PDFs uploaded to your server?
No. The files are read and combined entirely inside your browser using JavaScript — they never leave your device. Nothing is stored, logged, or transmitted.
Is there a limit on file size or number of pages?
There's no artificial limit, but the work happens in your browser's memory, so very large jobs (hundreds of megabytes or thousands of pages) can be slow or fail on low-memory devices. Everyday documents — even a few hundred pages — merge in a second or two.
Does merging re-compress or reduce quality?
No. Pages are copied into the new file exactly as they are — text stays sharp and searchable, and images keep their original quality. The merged file is roughly the sum of the originals' sizes.
Can I merge password-protected PDFs?
Not directly. Encrypted PDFs can't be read without the password, so you'll see a friendly error. Remove the password first (for example, by re-saving the file from a PDF viewer after unlocking it), then merge.
Can I change the page order inside a single file?
This tool orders whole files, not individual pages. To rearrange pages within one PDF, use our Split PDF tool to extract ranges, then merge them back in the order you want.