Merge PDF
Combine several PDFs and images into one file, in the order you choose.
or drop files anywhere on this page
Your files stay in this browser. Nothing is uploaded.
About Merge
Merge PDF files in your browser, along with any images, into one document in the order you set. The pages are read and joined by code running in this tab and are never sent to a server. Reach for it when a signed contract, a cover sheet and a report need to travel as a single file, or two halves of a scan landed in separate uploads.
Reordering, a table of contents and bookmark handling all live here. The tool copies pages as they are, so it will not shrink an oversized source file for you. Use Compress for that.
How it works
- Add the PDFs and images you want to combine. PNG, GIF, JPG, TIFF, BMP and WebP images are accepted, and each one becomes its own one-page document automatically.
- In Files view, drag files into order, use the arrows on each file, or sort with Sort A-Z or Sort Z-A. Switch to Pages view to reorder, rotate, remove or duplicate individual pages instead.
- Use Add pages if you only need a handful of pages from another file, not the whole thing.
- Open More options for double-sided printing, same-size pages, a cover page, a filename footer, bookmark handling, a table of contents and what to do with form fields.
- Click Merge PDF files and download the combined document, named after the first file in the Files list with -merged added, such as contract-merged.pdf.
What ends up in the merged file
Pages are copied into a new document, in the order shown, as PDF objects. Text stays text and images keep their resolution. Because the result starts as a blank document, properties such as title and author are not carried across, and the merged file has no password even if a source had one. Add one afterwards with Protect.
Bookmarks follow the setting under More options, Bookmarks: Keep all lists every source bookmark file by file, in the order the merged document presents them, One entry per file swaps them for one bookmark per file, Keep all, nested under one entry per file does both, and Discard all removes the outline. A bookmark that points at a page you removed is left out; one that finds its page by name is kept.
Form fields have four settings.
- Merge (Rename existing), the default: fields keep working, and a name already taken by an earlier file becomes Name_2.
- Merge: fields keep working under their original names.
- Flatten: typed values are baked into the page and the fields are gone.
- Discard: the fields are removed.
Options for printing and navigation
Double sided printing adds a blank page after any file with an odd page count, so the next file starts on a fresh sheet when printed on both sides. The blank matches that file's last page. Treat the first document as a cover page exempts the first file from that padding and from the table of contents.
Make all pages same size fits each page inside the first page's dimensions, centred and in proportion, so a landscape page gets margins rather than being stretched. Add filename to page footer prints each file's name, extension included, in small grey type at the foot of its pages.
Table of contents adds a linked list of your files at the front, in the order the merged document presents them, with a line and a clickable link for each. Based on file names drops the extension. Based on document titles uses the title stored in each PDF and falls back to the file name, which is always the case for images. The type shrinks, down to 6 point, to keep a long list on one page, and a list longer than that runs on to further pages rather than losing any file. With Double sided printing a blank page follows the list when it ends on an odd page, so the first file still starts on the front of a sheet.
A worked example
Say lease.pdf has 12 pages, addendum.pdf has 5 and photos.jpg is one image. Add all three, drag addendum.pdf above photos.jpg, turn on Double sided printing and set Bookmarks to One entry per file. The lease is even, so it gets no padding; the addendum and the photo are odd, so each gets a blank page after it. You download lease-merged.pdf with 12 + 6 + 2 = 20 pages and three bookmarks, one per file.
Things that catch people out
Three behaviours are easy to miss.
- The order you set in Pages view counts only if Pages view is still selected when you click Merge PDF files. Switching back to Files view merges whole files in file order.
- Add pages copies your chosen pages into a new file named like report (selected pages).pdf, which appears in the file list. Bookmarks from the original do not follow those pages.
- A file that needs a password to open adds its pages to Pages view once its password is accepted, after the pages already there.
Frequently asked questions
Bookmarks are rebuilt to point at each page's new position, so pages you reorder in Pages view still open at the right bookmark. Under More options, Bookmarks, choose One entry per file for a single heading per source file, or Discard all to drop them.
No. Pages are copied as PDF objects rather than flattened into images, so text stays selectable and images keep their original resolution. Make all pages same size scales pages to fit the first page's dimensions without rasterising them.
Yes. Add images alongside PDFs and each one becomes its own page, sized to fit the image, wherever you place it in the order. A TIFF only opens if your browser can decode it; otherwise the merge stops and asks you to convert it to PNG first.
The merge happens in your browser tab and the files are never sent to a server. Your browser does keep a Recent files list, with a copy of each file under 5 MB; clear it from the Recent files page. Nothing here can protect a file from browser extensions or other people using the same computer.
No fixed limit is built in. Since everything runs in the browser tab, the real ceiling is your device's own memory, and a few hundred scanned pages can feel slow on an older machine. If so, merge in two smaller batches, then merge those results together.
By default, Form fields is set to Merge (Rename existing), so the later field is renamed with a numeric suffix such as Name_2 and both stay usable. Choose Flatten to bake in whatever was already filled, or Discard to drop form fields entirely.
Yes. Under More options, Table of contents, choose Based on file names or Based on document titles, and a linked list of your source files is inserted at the front. A file marked as the cover page is left off the list.
No. Your source files are only read, never modified, and the merged PDF is created as a new file.
Yes. Type each file's password into the field on its row and wait for Password OK; the merge button stays disabled until then. The merged file has no password.
Merge only adds blank pages through Double sided printing, after files with an odd page count. For a blank page anywhere else, merge first, then choose Continue with on the result screen to open the file in Organize and use Add blank page.
Guides
Related tools
This tool ran entirely in your browser and nothing was uploaded. Your Recent files list keeps a copy of local files under 5 MB until you clear it. How your files are handled.