Merge PDF Files Online for Free

Merging joins several PDFs into one file while keeping every page in the order you choose. Nothing is retyped or rescanned: the original pages are copied into a new document, so a 40-page contract plus a 3-page addendum becomes a single 43-page file. This tool does that copying inside your browser tab, using the open-source pdf-lib library, which is why your files stay on your computer the whole time.

A merge does not have to swallow the whole file. Open the settings on any file in the list and decide which pages go in: all of them, odd pages only, even pages only, or a custom range such as 2-6, 9, 12. Anything you leave out is skipped, and the pages you keep are copied untouched. Note that files are joined one after another, so selections are concatenated in list order rather than alternated between files.

Most online mergers upload your files to a server, combine them there, and promise to delete them an hour or two later. This one uploads nothing. The merge runs entirely in your browser, so a bank statement, medical record, or signed contract never leaves your device. You do not have to take that on trust: open your browser's developer tools, switch to the Network tab, and run a merge. You will see no upload requests at all. Because no server does the work, there is also no daily task cap, no account, and no watermark.

Merging earns its keep whenever separate files really belong together. A few of the most common reasons people combine PDFs:

The tool reads each PDF with pdf-lib, copies the pages you selected into a fresh document, applies any rotation you set, and saves the result. All of that happens in JavaScript inside the browser tab, on a background thread so the page never freezes. Because pages are copied at the object level instead of being re-rendered, fonts stay embedded, text stays selectable, and images keep their original resolution. The one thing that may not survive is document-level extras like bookmarks or cross-file links, since the pages move into a brand-new file.

Add your PDFs, drag them into the order you want, and click Merge. The combined file downloads in a few seconds. The whole process runs in your browser, so your files are never uploaded.

Yes. Open the settings on any file and choose all pages, odd pages, even pages, or a custom range such as 2-6, 9, 12. Pages you leave out are skipped, so you can pull a few pages from one PDF and the full set from another in the same merge.

Yes. Set any file to Odd or Even and only those pages are included. One limit worth stating plainly: pages are joined file after file, not alternated. So if a duplex scanner gave you fronts in one PDF and backs in another, picking odd from one and even from the other returns all the odds followed by all the evens, not the two woven together. True page interleaving is a separate feature this tool does not have yet.

Yes. Each file has a rotate control that turns its pages 90, 180, or 270 degrees. This is handy for pages a scanner captured sideways. The rotation is saved into the merged PDF and only changes orientation, so there is no quality loss.

Yes. On desktop, drag a file by the handle on its left. On any device, use the up and down arrows to move it one step at a time. The number badge on each file shows exactly where its pages will land in the final PDF.

With this tool, yes, because nothing is uploaded. The merge happens entirely in your browser, so your files never reach a server. You can confirm it yourself: open your browser's developer tools, go to the Network tab, and run a merge. You will see no upload requests. Once you close the tab, nothing is left behind.

No. Pages are copied into the new file rather than re-rendered, so there is no re-encoding or compression. Text stays selectable, fonts stay embedded, and images keep their original resolution.

There is no limit on how many files you merge, no size cap per file, and no daily cap, since the work happens on your device rather than a server. The practical ceiling is your device's memory: a very large merge may be slow on a low-end phone, and it simply runs as fast as your hardware allows.

This tool merges PDFs only. If you want to include an image, convert it to a PDF first, then add it to the merge like any other file. Keeping the tool PDF-focused is what lets it run entirely in your browser.

If a PDF only has usage restrictions, it usually merges fine. If it needs a password just to open, you will have to remove that password first with an unlock tool, then add the unlocked file to the merge.

Yes. It runs in any modern browser, so you can add files, reorder them, choose pages, merge, and download straight from an iPhone, Android phone, iPad, or desktop. There is no app to install.

No account, no email, and no watermark, ever. The tool is free to use as often as you like, and the merged PDF comes out exactly as your pages appear in the originals, with no branding added to any page.

Page content such as text, images, and annotations carries over unchanged. Document-level extras like bookmarks and cross-file hyperlinks may not, because the pages are being moved into a brand-new document.