Merge PDF
Combine multiple PDFs into one file, in the order you choose.
or drop PDFs anywhere on this page
Your files never leave your device. No upload, no signup.
How to use Merge PDF
Three steps, all on your device.
- 1
Add your PDFs
Select two or more files, or drop them anywhere on the page.
- 2
Arrange the order
Drag the previews, or use the arrow buttons, to set the order.
- 3
Merge and download
Your combined PDF is created in your browser, ready to save.
Private by design
Processing happens in your browser. Your files are never uploaded.
No account needed
Free to use. No signup, no email, no watermark.
No upload wait
Files open straight from your device. There is nothing to send to a server first.
Merge PDF FAQ
Short answers to common questions.
Are my files uploaded anywhere?
No. OnePCApp reads and merges your PDFs inside your browser. Your files are never sent to a server.
Is there a limit on file size or number of files?
There is no fixed limit on file size or on the number of files. Everything happens on your device, so very large jobs depend on how much memory your computer or phone has.
Will bookmarks and links be kept?
Every page, its content and its links are copied, and links between pages point to the right page in the merged file. Bookmarks, accessibility tags and attachments are not kept yet; we show a note when a file has them.
Can I merge the same file twice?
Yes. Add it again and place both copies where you want them.
Does merging reduce the quality of my PDFs?
No. Pages are copied into the new file as they are: text stays text, and images are not compressed again.
Can I merge JPG images with my PDFs?
Not in one step. Turn the images into a PDF with JPG to PDF, choose “Continue with…” → Merge PDF on the result screen, then add your other PDFs.
Can I merge a PDF form?
Not while its fields can still be filled in, because merging would break them, so the file is refused. Fill it with Fill PDF Form, tick “Lock the answers”, then merge the saved copy.
Supported files and current limitations
Works with ordinary, unlocked PDFs. PDFs with fillable form fields or signature permissions are refused rather than changed. Password-protected and damaged files are refused too.
Every page and its content is copied with its size, crop and rotation, and links between pages are pointed at the new pages. Bookmarks, accessibility tags and attachments are not included in the new file yet; we tell you when a file has them.
Processing stays on your device with no cloud fallback. Very large files can exceed your device’s memory. Your original files are never changed.