Merge PDF files into one document
Add two or more PDFs, drag them into the order you want, and download a single combined file. Nothing is uploaded — the merge happens in your browser.
- Files never leave your browser.
- No account needed
- No watermark added
- Works on any device
How it works
Step 1: Choose or drop two or more PDF files (you can add more at any time).
Step 2: Drag the files — or use the arrow buttons on a phone — into the order you want.
Step 3: Select Merge PDF.
Step 4: Download the combined file.
What merging a PDF actually does
Merging copies every page from each source file, in order, into a brand-new PDF. Page content, images, fonts and page sizes are copied as they are, so a page that looked right in the original looks the same in the merged file — nothing is re-rendered or flattened into pictures.
The order you see in the list is the order of the result: the first file's pages come first, then the second file's pages, and so on. If a single file needs its pages rearranged afterwards, use the page organizer once the merge is done.
Why use this tool
Private by design
The files are read and combined by your browser. They are not sent to a server, so confidential contracts and IDs stay on your device.
Pages stay untouched
Pages are copied, not re-rendered, so text stays selectable and image quality is unchanged.
No account, no watermark
Merge as many times as you like without signing up, and the output carries no branding.
Works on phones
Add files from your phone's storage or cloud folders, and reorder them with simple up/down buttons.
Common uses
Expense reports
Combine the expense form with every receipt and invoice so finance receives one tidy file.
Job or visa applications
Join your cover letter, CV and certificates into one upload when a portal accepts a single PDF.
Contracts with annexes
Attach schedules, terms and signed pages to the main agreement in the right order.
Scans from several sessions
Scanners often create one file per batch; merge them into a single document before archiving.
Study material
Put lecture slides, notes and reading lists together so you can search them in one place.
Getting the file order right
The most common merging mistake is a wrong order, especially when file names are like scan (10).pdf, which many systems sort before scan (2).pdf. That is why the list here is fully manual: name order is only where files start, and you decide where they end up.
- Put the file you want on top of the merged document first — a cover page or table of contents.
- Check the page count next to each file so you know where each part begins in the result.
- If you spot a mistake after merging, you can reorder or delete pages with Organize PDF and Delete PDF Pages.
Keeping the merged file small
A merged file is roughly the sum of its parts. If an email or upload form has a size limit, run the result through Compress PDF afterwards; compressing after merging gives one file to tune rather than many.
Supported formats
- Input
- PDF files (.pdf). Not password-protected.
- Output
- One PDF file.
To merge images, convert them first with Images to PDF, or add them from that tool.
Good to know
- Password-protected PDFs must be unlocked first (use Unlock PDF).
- Bookmarks and document outlines from the source files are not carried over to the merged file.
- Very large files are limited by your device's memory. If the browser struggles, merge in smaller batches.
- Fillable form fields may not stay editable after a merge; flatten forms first if you need them to look identical.
Your files never leave your browser
This tool runs entirely on your device using your browser. Your files are not uploaded to our servers and are not stored anywhere. Closing the tab discards everything.
Frequently asked questions
Are my PDF files uploaded when I merge them?
No. Merging runs in your browser, so the files never leave your device. You can confirm this by disconnecting from the internet after the page has loaded — the merge still works.
Is there a limit on the number of files or pages?
We do not set a page or file-count limit for merging. The practical limit is your device's memory: a phone will handle a few dozen ordinary documents, a desktop many more.
Will the merged PDF lose quality?
No. Pages are copied without re-encoding, so images, fonts and vector graphics keep their original quality.
Can I merge PDFs of different page sizes?
Yes. Each page keeps its own size, so A4 and Letter pages can live in the same file. If you need a uniform size, print-to-PDF at a fixed size in your viewer afterwards.
Can I merge a password-protected PDF?
Not directly. Remove the password first with Unlock PDF (you need to know the password), then merge the unlocked copy.