Merge PDF files
Combine multiple PDFs in the order you want quickly into a single file using WrongPDF free online PDF merger tool. Our PDF Marge tool is user friendly, you can combine multiple PDF documents into one file quickly. It is easy to use and securely change multiple files into a single pdf document, shareable PDF without installing software.
Your file is processed inside this browser tab. Nothing is uploaded to a server.
How to merge pdf files
- 1
Add your PDF files
Drop two or more PDFs onto the box, or click it to pick them from your computer.
- 2
Put them in the right order
Drag any file up or down. The merged document follows this order top to bottom. Optionally set a page range per file to include only part of it.
- 3
Merge and download
Click Merge PDF. The combined file is built in your browser and downloads immediately.
About the Merge PDF tool
Merging PDFs is the quickest way to turn a pile of separate documents — a scanned contract, a cover letter, a set of invoices — into one file you can send in a single attachment. WrongPDF does it without uploading anything: your files are read straight into the browser tab, combined there, and handed back as a download.
Because nothing is transmitted, there is no file size cap imposed by a server, no queue, and no waiting for an email link. Reorder the documents by dragging them, restrict any file to a page range like 1-3, 8 and merge as many PDFs as your machine can comfortably hold in memory.
Frequently asked questions
Are my files uploaded to a server?+
No. The merge runs in JavaScript inside your browser tab. Your documents never leave your computer, which is why the tool still works if you go offline after the page has loaded.
How many PDFs can I merge at once?+
There is no fixed limit. The practical ceiling is your device's memory — merging dozens of ordinary documents is fine, while combining several very large scanned files at once may be slow on a phone.
Can I merge only some pages from a file?+
Yes. Each file has an optional page range box. Enter something like 1-3, 7, 10- to include only those pages from that document in the merged result.
Will merging change how my PDFs look?+
No. Pages are copied across with their original size, rotation, fonts and images intact. Nothing is re-rendered or re-compressed.
Do the merged files keep their form fields and links?+
Interactive annotations such as links are carried over with the pages. Form fields from multiple documents can conflict when they share field names, so check filled forms after merging.