CornerTools

Merge PDF

Combine PDFs and images into one PDF in any order, with forms and links intact, without uploading them.

Drop PDFs or images here or paste images, or

Your files never leave your device

Processed in this browser · up to 50 at a time

Joins PDFs, and photos or scans, into one PDF: application forms with their certificates for a portal that takes a single file, statements for a year, or chapters into a book. Put the files in order, take only the pages you need from each, or mix pages from different files. Form fields, links and the first file's bookmarks still work in the merged PDF. The files are read and joined on your device and never uploaded.

How to use it

Add PDFs and images by dropping them on the tool or with Choose files, or paste images; a PDF with a password asks for it. The files show in the order they will be merged, each with a letter, its first page and its name.

  • Files: drag a file to move it, or use Sort by name. Choose pages opens a PDF's pages under it: tap a page to leave it out or take it back, or type them in Pages, in order, as in 1-3, 5, 8- (or last, odd, even), and press Enter; typed pages can repeat, in any order. Turning or deleting a file turns or removes all of it.
  • Pages: every page of every file, named by its file's letter (A1, A2, B1). Drag pages between files, turn them, or delete those you do not want. Undo and redo cover both views.
  • A bookmark for each file: adds a bookmark named after each file at its first page, and opens the PDF with the bookmarks showing.
  • Double-sided printing: adds a blank page, the size of the page before it, after each file with an odd number of pages, except the last, so every file starts on the front of a sheet. Where pages of files are mixed, each unbroken run of one file's pages counts as a file.

Each image becomes one A4 page, or Letter where the browser's language names a country that uses Letter paper, turned to suit the image, the whole image shown; a JPG goes in as it is, without being saved again. For other page sizes or margins, make the images into a PDF with JPG to PDF first. The merged PDF is named after the first file, as in report-merged.pdf.

Frequently asked questions

Yes. Fields keep their answers and stay fillable. When two files have a field of the same name, the later one is renamed (as name+1), so each keeps its own answer; the result says when that happened. A dynamic XFA form, whose pages only Adobe Acrobat and Reader can draw, cannot be merged: print it to a PDF from Reader first.
The first file's bookmarks are kept; bookmarks of the other files are left out, and the result says so. With A bookmark for each file, the first file's bookmarks sit inside its own. Links that jump within a file keep working, each to its own file's page, including links by name that many PDFs made with LaTeX and Word use. A link to a page you left out goes nowhere.
A PDF that needs a password to open asks for it, and the merged PDF has no password. A PDF with only an owner password, which restricts printing or copying, opens without one, and the merged PDF drops those limits. A digitally signed PDF can be merged, but its signature will no longer verify, as with any change to a signed file; the tool says so when you add one.
Printed on both sides, a file with an odd number of pages ends on a front, and the next file starts on the back of that sheet. A blank page after it moves the next file to a new sheet, so the printout can be split back into separate documents.
No. Your browser reads, merges and saves the files on your device; they are not sent to CornerTools or anyone else, and neither is a password you type. To check, open the browser's developer tools at the Network tab and add a PDF: no request carries it. The PDF engine downloads from this site the first time you use it: a download to your browser, not an upload of your file.

See also

  • JPG to PDF — to make photos and scans into a PDF with the page size and margins you choose.
  • Organize PDF — to reorder, rotate or delete single pages of the merged PDF.
  • Split PDF — to divide a PDF into several.
  • Compress PDF — to bring the merged PDF under an upload limit.