Job portals that accept only one file, a contract that arrived in three parts, receipts for an expense claim: there are many times when several PDFs need to become one. Combining them takes about a minute, and the result looks exactly like the originals.
How to combine PDF files
- Open Merge PDF and add two or more files. You can also drag them onto the page. Each file shows its size and page count once it has been read.
- Put the files in order. They are combined from top to bottom. Drag a file to move it, or use the up and down arrows next to it.
- Click Merge. Your browser downloads one PDF that contains every page of every file, in that order.
That is it. The files never leave your device: everything happens in your browser tab.
Get the order right the first time
The order of files is the order of pages in the result, so it is worth a few seconds of planning:
- Cover or main document first, then supporting documents (appendices, ID copies, certificates).
- Number your files before you add them, for example
01-cover.pdf,02-letter.pdf. They are then easy to put in order. - Check the page count. The tool shows the pages in each file, so you can see at a glance if something is missing.
The pages inside each file keep their original order. If you need to change that order too, see the last section.
Will the quality change?
No. Merging copies the pages as they are. Text stays sharp and searchable, images are not recompressed, and every page keeps its own size, so an A4 letter and a US Letter form can sit in the same file.
The combined file is about as big as all the originals added together. If it is too big to send, make it smaller afterwards.
What is not kept
A few things belong to the original files and do not carry over:
- Bookmarks and outlines (the clickable table of contents in the sidebar).
- Fillable form fields may stop working. Fill in and save forms before merging.
- Links to other pages in the same document may break, because those pages have moved. Links to websites keep working.
Password-protected PDFs cannot be merged until the password is removed. The tool marks them in red as soon as you add them.
Combine only some pages
Want pages 1–3 from one file and all of another? Do it in two steps:
- Use Split PDF and choose Extract to save just the pages you need.
- Merge that new file with the others.
The same trick lets you reorder pages: split a document into parts, then merge the parts in a new order.
On a phone
The tool works in mobile browsers too. On a phone, choose the files from your Files app (iPhone) or file manager (Android). If you are combining a very large number of files on an older phone, merge them in smaller groups and then combine the groups.