Merge PDFs

Combine multiple PDF files into a single document.

This tool runs entirely in your browser. Your data is never uploaded, never stored, and never leaves your device.

Joins several PDFs end to end into one document, keeping every page of every file and letting you settle the order before you commit.

How to use it

1Drop in two or more PDFs — you can add them in several goes, and each new batch lands at the bottom of the list.
2Use the ↑ and ↓ buttons to move a file up or down the list, or Remove to drop one you added by mistake.
3Press Merge PDFs, then download merged.pdf.

Example

Input: Three PDFs of 2, 1 and 4 pages, listed in that order
Output: merged.pdf, 7 pages long: the first file's two pages, then the second file's page, then the third file's four

There is no page picker — the whole of each file goes in, so trim a document with the Split tool first if you only want part of it. One password-protected file stops the entire merge rather than being skipped.

What happens to your data

The files are read into memory and stitched together by pdf-lib running in the page itself. Nothing is uploaded, so merging a stack of statements or signed contracts involves no third party.

Last updated August 2026

Merging a PDF is nearly always somebody else's requirement. An upload box takes one file, so a covering letter, a CV and two certificates have to arrive as one. A scanner produced a separate PDF for every sheet it fed. An accountant wants twelve monthly statements as a single document. The pages are already right — they are simply spread across the wrong number of files.

This does that one job: whole files, in the order of the list, written into a new document called merged.pdf. It runs in the page — pdf-lib reads your files into this tab's memory and nothing is uploaded — which is the part that counts when the stack you are combining is bank statements, a signed contract or an application pack.\n\nThe job goes by several names \u2014 merge PDF online, combine PDF files, a PDF merger or PDF combiner \u2014 and they describe one thing: several documents becoming one, in an order you choose. Merge PDF files once and you have a single attachment instead of six. It is merge PDF free here in the plain sense, with no account, no page cap and no watermark, because the joining happens in your browser rather than on a server.

How it works

Toolvore creates an empty PDF with pdf-lib in your browser, then works down the list in order: each file is read into memory, every one of its pages is copied into the new document, and the finished bytes become a download made on your own machine. Copying a page carries its content, fonts and images across untouched, so text stays selectable and nothing is re-rendered or re-compressed — and because every page keeps its own dimensions and rotation, an A4 report and a Letter attachment can sit in one file without either being resized. The flip side is that the new document starts genuinely empty, so anything held at document level rather than on a page — an outline of bookmarks, the title and author fields, a fillable form's list of fields — is not carried across. Any change to the list, whether adding, removing or moving a file, clears the previous download, so you cannot walk away with a merged.pdf that no longer matches what is on screen.

Common use cases

Combining a covering letter, a CV and a certificate into the one PDF an application form will accept
Putting a scanner's one-file-per-sheet output back together as a single document
Handing an accountant twelve monthly statements as one file instead of twelve attachments
Adding a signed signature page back onto the contract it came from
Assembling a meeting bundle so everyone opens one attachment rather than six

Frequently asked questions

How do I combine PDF files into one?＋

Add them through the file picker or by dragging them onto the box, check they are the right way round, then press Merge PDFs — it joins them end to end, every page of the first file followed by every page of the second, with nothing dropped in between. The button stays disabled until there are at least two files in the list. What downloads is called merged.pdf, so rename it afterwards if that is not what it should be called.

Can I change the order the files are merged in?＋

Yes, and it is worth checking before you press anything. Files sit in the order your file picker handed them over rather than one the tool chose, and the arrow buttons move a row up or down; each button is labelled with the filename it acts on, and focus follows the row it moved, so the list works from the keyboard as well as the mouse. Two things to know: a row swaps with its neighbour one press at a time — there is no dragging, so the last file of ten reaches the top in nine presses — and there is no preview, only filenames, so a set called scan001.pdf through scan014.pdf has to be trusted or opened separately first.

Will the merged PDF be smaller than the files that went into it?＋

No. Pages are copied rather than re-compressed, so expect roughly the sum of the parts: ten copies of a 407.5 KB scan measured here came out as a merged.pdf of 3.97 MB against the 3.98 MB that went in, a saving of about 560 bytes per file for the document scaffolding you no longer need ten of. Identical images in different files are not shared either — each copy travels across on its own. If the result has to fit an email or an upload cap, put it through the PDF compressor afterwards.

Can I merge a password-protected PDF?＋

No, and it stops the whole job rather than skipping the one file. The merge fails with "Could not merge these PDFs. Make sure every file is a valid, unencrypted PDF.", no download appears, and the files that were fine are not salvaged. That includes a PDF encrypted only against editing or printing, which opens for reading without anyone typing a password. Open the locked document in a viewer that has the password, save an unprotected copy, and merge that instead. The same message covers a damaged file, or something that is not a PDF at all.

Do bookmarks and form fields survive the merge?＋

Page content does; anything living at document level does not. The result is a brand-new document that only pages are copied into, so a source file's bookmarks, its title and author, and its list of fillable fields are all left behind — a filled form tested here came through reporting no form fields at all, although the name typed into it is still drawn on the page. Text and images are untouched and stay selectable; pages are never flattened into pictures. One thing to expect: printed page numbers belong to the page, so a bundle can run 1, 2, 3, 1, 2 — the page numbering tool will add a running sequence of its own, though the original numbers stay where they were.

Is my PDF uploaded to be merged?＋

No. pdf-lib runs inside the page, the files are read into this tab's memory and stitched together there, and the download is produced on your machine. The only network request pressing Merge can trigger is your browser fetching pdf-lib's own code from this site the first time; no file is ever sent anywhere. Given that what people combine here is usually statements, contracts and scans of identity documents, that is the point rather than a footnote. If you arrived by pressing Continue with on the PDF compressor or one of the image-to-PDF converters, that file was passed across inside the tab as well — never uploaded, and lost if you reload.

Can I merge JPG to PDF here, or only PDFs?＋

Only PDFs. To join PDF files is all this does; it does not convert pictures. If you searched for merge JPG to PDF what you probably want is two steps: turn the images into a PDF with the image-to-PDF tool, then join that to whatever else you have here. Doing it that way is also the only way to control where the photographs land in the finished document, which a one-step tool decides for you.

Is there a limit on how many files a PDF combiner should take?＋

Not one imposed here \u2014 there is no file count, no page cap and no size ceiling written into the tool. The practical limit is your own device, because every document is held in the tab's memory while the new one is assembled. Ten ordinary reports are nothing; forty large scans on a phone may not finish. Where a very large batch stalls, join it in halves and then join the halves.