Your files never leave your device — 100% local processing

Merge PDF

Combine several PDFs into a single file, in the order you choose. Your files are never uploaded.

Drop PDF files here or click to select

Two or more PDFs · processed entirely on your device

Choose files

0 B uploaded — this page has not sent your files anywhere?

Private by design — this tool never uploads your files anywhere. Everything runs inside your browser, and the finished file is saved straight to your device.

Other conversion sites upload your file to a server, process it there, and say they delete it after a while. Until that happens, your file sits on someone else’s server. Here there is no upload step at all. The more sensitive the file — contracts, ID scans, medical records — the more that difference matters. See how to verify it →

Combine several PDFs into one file, in exactly the order you want

Job portals, visa applications and expense systems often accept a single file only. This tool joins any number of PDFs end to end, in the order shown in the list, and saves one new PDF. The work happens inside your browser, so none of the files are uploaded.

A closer look

Merging does not turn pages into pictures. A new document is created and every page of every file is copied into it as it is, so text stays selectable and searchable, print quality is unchanged, and a mix of page sizes such as A4 and US Letter keeps each page’s own dimensions. What merging does not do is shrink anything: the fonts and images inside each file travel along with their pages, so the result is usually about the sum of the inputs. If that total is over a portal’s limit, run the merged file through Compress PDF afterwards.

Pages come across, but things that belong to a document as a whole do not. Bookmarks (the outline panel in your viewer) from the original files are dropped, and the new file does not inherit the originals’ title or author fields. Fillable forms may stop behaving like forms once merged, so fill them in and save first, then combine. There is no cap on how many files you add, but every one of them is read into your device’s memory, so several hundred megabytes at once can make a phone sluggish.

How to use it

Drag PDFs onto the drop area or press Choose files. You can add more in several rounds; each batch is appended to the end of the list, and anything that is not a PDF is skipped.
The number at the left of each row is its position in the final file. Use ↑ and ↓ to move a file, and ✕ to remove one you added by mistake.
Once at least two files are listed, Merge PDFs becomes active. Press it and the status line shows progress such as “Processing… (2/5)” followed by the file name.
When it finishes, a file named “merged.pdf” downloads and the message shows its size. The list stays in place, so you can reorder and merge again if needed.

When it helps

Application packetsPut a résumé, cover letter and certificate scans in the order the employer asked for and upload one file.

Monthly expense claimsJoin receipts downloaded separately from different stores into one supporting document, in date order.

Contracts scanned in batchesReassemble a contract that the scanner saved as several short files back into a single document.

Course readersCombine weekly lecture handouts into one PDF so you can flip through the whole term on a tablet.

Common snags

It says “One of these PDFs is password-protected”.At least one file has an open password or an owner restriction. The message also appears for files that open without a prompt but block printing or editing. Remove the protection with Unlock PDF, then swap the unlocked copy into the list.

The order is not the one I picked.When you select several files at once in the file dialog, the operating system hands them over in its own order, usually by name. Check the numbers before merging and fix them with ↑↓. Prefixing file names with 01, 02, 03 makes them arrive in the right order from the start.

The merged file is too large to upload.Merging never reduces size. Open Compress PDF, enter the portal’s limit as the target size, and compress the merged file once instead of compressing each input separately.

My bookmarks are gone.Bookmarks from the source files are not carried over. The pages themselves are complete; only the outline panel in the viewer is empty. If you need an outline, add one in a desktop PDF editor after merging.

Tip Before you submit, open the merged file and look at the first page and at each point where one source file ends and the next begins. If something is out of place, the list is still there: fix the order and press Merge PDFs again.

How to merge PDF files

How does it work?

1) Pick or drag in your PDF files. 2) Use the ↑↓ buttons to put them in the right order. 3) Press "Merge PDFs" and the combined file downloads automatically.

How many files can I combine?

There is no limit on the number of files. Very large or very numerous PDFs may simply take a moment, depending on how fast your device is.

Can I merge password-protected PDFs?

Not directly — remove the password first with our Unlock PDF tool, then merge the unlocked files.

Are my documents uploaded to a server?

No. The merge runs in JavaScript inside your own browser, so contracts, invoices and personal records never travel over the network. You can even disconnect from the internet and it still works.