Merge Multiple PDF Files Online
Combine several PDF files into one document, in the order you choose, directly in your browser.
Choose PDF Files or Drag & Drop Here
Select multiple PDF documents to combine into one
Loading PDF files...
Pages Copied As-Is
Pages are copied into the new file with pdf-lib, so text stays selectable and pages are not converted to images.
Browser-Based Processing
Your PDF files are combined in your browser's memory and are not sent to a LeedyBox server.
Easy Reordering
Arrange PDF sequence easily with up and down controls before merging.
How to use
PDF parsing and merging are performed in your browser. Pages from each file are added in the order shown in the list. Password-protected PDFs may not open, and bookmarks or form fields may not carry over to the merged file.
- Click the drop zone or drag PDF files onto it. You can select several files at once and add more later; each file is listed with a preview of its first page and its page count.
- Put the files in order with the up and down arrows. The file at the top of the list becomes the beginning of the merged PDF.
- Remove a file with its × button, or click "Clear All" to start again.
- Click "Merge PDF Files & Download". All pages of every file are copied in the order of the list and saved as merged_document.pdf.
- Open the merged file and check the page order before you send it or delete the original files.
Frequently asked questions
Are my PDF files uploaded to a server?
No. Your PDF files are read and merged in your browser and are not sent to a LeedyBox server.
How many PDF files can I merge at once?
There is no fixed limit on the number of files, but every file is loaded into your browser's memory. Very large or numerous files can slow the page down or fail on devices with limited memory; merging in smaller batches helps.
Does merging change the quality of my PDFs?
No. Pages are copied from the original files without being re-rendered, so text and images are not recompressed.
Can I merge only some pages of a file?
Not in this tool: every page of each file is added. Take the pages you need out of a file with Split PDF first, or delete and rearrange pages in the merged file with Organize PDF.
Why does a file fail to load, or the merge stop with an error?
A PDF that needs a password to open cannot be read here; open it in a PDF reader with the password and save an unprotected copy first. Damaged files, and some files that open without a password but restrict editing, can also fail. If one file fails while merging, nothing is downloaded: remove that file and merge the rest.
Do bookmarks, links and form fields carry over?
The content of each page is copied, including text, images and comments on the page. Bookmarks, the document title and other document information are not. Form fields may no longer be fillable, and links that jump to another page of the same file may stop working, because the merged file is a new document.