Sooner or later you need to combine a few PDFs into one: a report built from separate chapters, a month of scanned invoices, contracts that belong together. You don't need Acrobat or a paid app for it. Merge them in your browser in seconds, for free, and the files never leave your device.
What does "merging" a PDF actually do?
Merging takes two or more separate PDF documents and stitches their pages together into a single new file, in the order you choose. Nothing is re-typed or re-scanned, the original pages are copied exactly as they are, so text stays selectable and images keep their resolution. The result is one document that's easier to email, print, archive or upload.
How to merge PDF files online (step by step)
- Open the merge tool. Head to the Merge PDF tool, no account or download needed.
- Add your files. Drag your PDFs onto the drop zone, or click to browse and select them. You can add as many as you like.
- Put them in order. Drag the rows up or down so the pages will appear in the sequence you want. This is the step most people forget, do it before merging.
- Click "Merge PDFs". The tool combines everything instantly.
- Download. Your single merged PDF downloads automatically.
Common reasons people merge PDFs
- Reports and proposals, combine a cover page, body and appendix into one deliverable.
- Invoices and receipts, bundle a month of receipts into a single file for bookkeeping.
- Scanned documents, join pages that were scanned one at a time.
- Applications, merge a resume, cover letter and portfolio for a job or grant submission.
- eBooks and manuals, assemble chapters exported separately.
Tips for a clean merge
- Name files in order first. If you rename them 01, 02, 03… they'll be easier to arrange.
- Check page orientation. If some pages are sideways, fix them with the Rotate & Organize tool before or after merging.
- Remove blank pages using the same organize tool to keep the final document tidy.
- Compress afterwards if the merged file is large, see the Compress PDF tool.
Troubleshooting
"One of my files won't merge." The PDF may be password-protected or corrupted. Remove the password (open it and re-save/print to PDF) and try again.
The order is wrong. You likely merged before reordering. Just clear the list, re-add and drag the rows into place first.
The file is huge. Merging several image-heavy PDFs adds up. Run the result through the compressor to shrink it.
Frequently asked questions
How do I merge PDF files for free?
Just drag your PDFs into the tool above, arrange them in order and click Merge PDFs. It downloads a single combined file, completely free, with no sign-up.
Is there a limit to how many PDFs I can combine?
No. You can merge as many PDF files as your device can handle. Because processing is local, there are no artificial caps.
Will merging reduce the quality of my PDF?
No. PDFOtter copies pages exactly as they are, so text stays sharp and images keep their original resolution.
Are my documents safe when I merge them?
Yes. Everything happens in your browser, your PDFs are never uploaded to a server, so they stay 100% private.