Add your PDFs below, drag them into the order you want, and press the button. You get one file back with everything joined together.
And if you have been putting this off because you did not want to hand a contract or a payslip to a website you have never heard of, do not worry, you were right to think about it, and you are not alone. Nothing here is uploaded. The joining happens inside your own browser, which is explained properly further down, along with how to check it for yourself in about ten seconds.
Your files never leave this computer. The merging happens in your browser. Nothing is uploaded, nothing is stored, and the page keeps working with the network switched off.
Add two or more PDFs. They will be joined in the order you put them in, and you can leave the page numbers blank to take every page.
Every other free PDF merger sends your file to a stranger
Search for a way to merge PDF files and what you get, almost every time, is an upload form. This is not a dig at those sites. It is just how they are built.
The well known ones do the work on their own servers, which means your file is uploaded, sits on a computer belonging to somebody else, and is deleted later on their schedule rather than yours. Their policies all say they delete it, and I have no reason to think they do not.
But look at what people actually merge. Contracts. Payslips. Bank statements. Passport scans for a visa. Two halves of a scanned medical letter. A tenancy agreement. If you work somewhere with rules about client data, uploading that to a free website is often the exact thing you are not allowed to do, and nobody thinks about it because the page looks like a toy.
Think of it like a photocopier. Using the one in your own office and taking a private letter down to the copy shop are not the same act, even though the paper comes out identical.
And you can check this one, rather than believing me
- Press F12 to open your browser’s developer tools, and click the Network tab.
- Add your files and merge them.
- Watch the list. Nothing goes out.
Or do the blunt version: load this page, turn your wifi off, and merge anyway. It still works, because there is nothing to send.
The merged file is not smaller, and it should not be
People are often surprised by this, so it is worth saying plainly.
Joining PDFs is not compression. Your merged file will be roughly the size of all the parts added together, and it can be a little larger than the sum, because each original carried its own index and fonts that now sit side by side.
That is on purpose. Every page is copied across exactly as it was, still compressed the way its own program compressed it. Text stays selectable, images stay sharp, and nothing is re-encoded. A merger that shrinks your file has thrown some of it away, and the place it usually throws it away from is your scanned images.
If the joined file is now too big to email, that is a separate job. The PDF compressor here will shrink it. It tells you which part of the saving cost you nothing and which part changed your pictures, and it runs in your browser as well, so the file still goes nowhere.
Why some free mergers give you blank pages
If you have ever merged something and got a stack of empty sheets where the text used to be, here is what happened, and it is a genuinely interesting bit of how PDFs are built.
A PDF does not store every setting on every page. Things like the paper size and the list of fonts can be written once on a parent entry, and the pages underneath simply inherit them, the same way a folder can set a rule that everything inside it follows.
So if you lift a page out of one document and drop it into a new one without carrying those inherited settings down onto the page itself, you get a page with no size and no fonts. It opens. It is just empty.
This one copies the inherited settings onto each page as it goes, and that case is one of the things the page is tested against before it is published.
Taking only some pages
Each file gets a small box for page numbers. Leave it empty and the whole file goes in. Otherwise:
1-3 the first three pages
2, 5, 9 just those three
1-2, 8- the first two, then page 8 to the end
5, 1 page five first, then page oneThe order you write is the order you get, and a page can appear twice if you ask for it twice.
If it cannot understand what you typed, it stops and tells you. That matters more than it sounds. Nobody counts the pages in a merged file, so a tool that quietly ignores a number it did not understand hands you something that looks finished and is missing a page of a contract.
Where this stops, honestly
Every tool has edges. These are the ones here, so nobody finds them the hard way.
- Password protected files are refused. It says so rather than producing a file with pages missing. Remove the password in whatever program made it, then come back.
- Bookmarks do not survive. The clickable outline down the side of a long PDF lives on the document rather than on its pages, so joining pages together leaves it behind. The pages, text, images and links all come across.
- Fillable forms stop being fillable. The boxes still show, and anything already typed into them still shows, but the form machinery is part of the document rather than the page. If you need a working form, merge first and add the fields afterwards.
- Very large files use memory. Everything happens in your browser, so a few hundred megabytes at once may be slow on an old phone. On a laptop it is not a problem.
Frequently asked questions
Is there a limit on how many files?
No. There is no account, no daily allowance and no upsell, because there is no server paying for any of this. Whatever your computer can hold, it will merge.
Can I put the pages in a different order?
Yes, two ways. Move whole files up and down with the arrows, and choose exact pages in the box on each row. Writing 3, 1, 2 gives you those pages in that order.
Does it work on a phone?
Yes. Choosing files opens whatever your phone uses for documents, and the merged file goes to your downloads like anything else. Dragging to reorder is fiddly on a small screen, so the arrows are there instead.
My file will not open, and it is definitely a PDF
Two things cause nearly all of these. It is password protected, which this page will say in as many words. Or it is damaged, usually a download that stopped part way, and then the end of the file where the index lives is simply not there.
Try opening it in a reader first. If the reader complains too, the file is broken rather than this page being fussy.
If you have any issues, you can ask me via comment, and I will love to help you out.