Merge PDF Free Online
Merge PDF free online: combine files in your browser, nothing uploaded.
Merge PDF free online: combine several PDF files into one document, in the order you choose.
- Free, no sign-up
- Files never leave your device
- Up to 100 MB per file
Drop PDF files here
or
Up to 100 MB per file. Your files stay on your device.
What next
- Scroll through the merged file once. A page that came out sideways can be fixed with Rotate PDF.
- Many online forms limit the size of an upload. Check the limit before you send a large merged file.
- Give the file a clear name, such as your name and what it contains, before attaching it.
Step-by-step guide: How Do I Open a .pub File Without Publisher?
How to merge PDF files online
- 1
Click “Choose PDF files” or drag your PDFs into the box.
- 2
Put the files in the order you want using the up and down arrows.
- 3
Click “Merge PDF” and wait a moment.
- 4
Click “Download PDF” to save your new file.
What happens to your files when they are merged here
Each file is read as it is added and listed with its page count and size, and the files are joined from top to bottom in the order shown. The arrows beside each file move it, and the × that removes it sits apart from them, so a slip of the thumb doesn’t take a file out. The line above the button adds up the files and pages before you merge.
Each file’s contents are copied into the new file once, as they are: pictures aren’t recompressed and pages aren’t redrawn. Bookmarks come along file after file, links between pages of one file still lead to their page, and form fields stay fillable, with a second field of the same name renamed so the answers stay apart.
Example: three chapters with their bookmarks
For this example we made three sample chapters of an invented workshop club’s handbook, seven pages in all, each with its own bookmarks: a bookmark per chapter and one per section under it, ten in total.
Merged in order, they made a 7-page file of 128 KB, smaller than the 148 KB of the three together, because the file is written out again more tidily. All ten bookmarks were there, the three chapters at the top with their sections under them, so a reader can still jump to “Booking a bench”.
With “Add a bookmark for each file” ticked, three more bookmarks appeared at the top, named after the files: “en-chapter-1”, “en-chapter-2” and “en-chapter-3”. That is why it is off by default: a file name such as “draft v3 final” or one with a person’s name in it would travel inside the document you send.
Merge here, or another tool?
If the fronts are in one file and the backs in another because the scanner took the paper twice, a plain merge puts all the fronts first and all the backs after. Merge odd and even pages puts each back after its front and turns reversed backs round.
For phone photos of documents rather than PDFs, put them together with JPG to PDF first. After merging, Rearrange pages moves any page into place, and if the merged file is too big for an upload form, Compress PDF or Split PDF brings it under the limit.
When you would use it
Handing in one file when you have several: a scanned ID, a certificate and a filled-in form usually arrive as three separate PDFs.
Putting a report back together after different people wrote different parts of it.
Collecting a month of invoices or receipts into one file for the accounts department.
Joining the chapters of a thesis or report, written one file per chapter, with their bookmarks.
What to expect
Pages are copied exactly as they are, with no re-compression, so quality never drops. The new file is about as big as the originals added together, or a little smaller.
Bookmarks, links inside each file and form fields are kept, and no file name is written into the merged file unless you ask for a bookmark per file. What belongs to a whole file rather than to its pages is not: screen-reader tags, attached files, scripts and page labels (i, ii, 1…). A field whose name an earlier file already uses is renamed, such as “Name 2”.
The order is the one you set on the page, not the order the files were chosen in, so check it before you press the button.
Password-protected files cannot be combined until the password is taken off, because their pages are encrypted.
Frequently asked questions
Can I merge PDF without watermark or sign-up?
Yes. There is no sign-up, no limit on how many times you merge, and no watermark is added to your file.
Are my files uploaded to a server?
No. The merging happens entirely inside your browser, on your own device. Your files are never sent to us or anyone else.
How many files can I merge?
There is no fixed limit on the number of files. Each file can be up to 100 MB. Very large jobs depend on how much memory your device has.
Will the quality of my PDFs change?
No. Pages are copied exactly as they are, so text, images and fonts stay the same. Nothing is compressed.
Does it work with Arabic PDFs?
Yes. Because pages are copied as they are, Arabic text looks exactly the same as in your original files.
Why can't I add a password-protected PDF?
Protected PDFs are encrypted, so their pages can't be combined with other files. Remove the password first (for example, in the app that created the file), then add it again.
Are bookmarks and fillable form fields kept?
Yes. The bookmarks already inside the files come along, one file after another. Tick “Add a bookmark for each file” and every file also gets a bookmark with its name, with its own bookmarks under it; it is off by default, because your file names may be private and would travel with the file you send. Links from one page to another inside a file still work, and form fields stay fillable. If two files have a field with the same name, the second is renamed (“Name 2”), so the answers stay separate. Screen-reader tags, attached files and page labels of the originals are not carried over.
Why are there bookmarks named after my files?
Because “Add a bookmark for each file” was ticked. It is off by default; leave it off if your file names give away anything private.
Can I rotate and merge PDFs in one go?
Not here: merging keeps each page as it is. Merge first, then open the merged file in Rotate PDF and turn the pages that need it.
Why is the merged file smaller than my files added together?
The new file is written out again in a tidier way, which usually saves a little: three sample chapters of 148 KB came out at 128 KB. Nothing is compressed, so quality is unchanged.
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