PDF Merger
Combine multiple PDF files into one unified document privately in your browser. Reorder files easily before merging.
Choose Multiple PDF Files or Drag & Drop Here
Select 2 or more PDF documents to combine into a single file (Up to 50MB per file)
Getting a Clean Merge: Order, Page Count and Common Snags
Merging looks simple, but a few habits save you from redoing the job. The tool copies the pages of each file into a new document in the order shown in the Merge Sequence list, with the top file first, so the planning happens before you press the button.
Plan the order first
Name your files so they sort in the sequence you want, for example 01-cover, 02-summary, 03-appendix. After adding them, use the arrows to correct anything out of place. It is much easier to move a whole file than to fix a page order afterward. The summary line shows total pages and total size, which gives you a quick sanity check: if the page count is lower than you expected, a file is missing or did not load.
Typical uses
- Joining a signed signature page to a contract body.
- Combining separate scanned receipts into one expense report.
- Putting a cover letter, resume and certificates into a single application file.
- Assembling chapters exported separately from a design or layout program.
Mixed page sizes and orientations
Pages are copied, not rescaled. A landscape slide placed between portrait pages stays landscape, and A4 pages stay A4 next to US Letter pages. That is usually what you want, but if you need a uniform size for printing, set the size in your print dialog or fix the source files first.
When a file will not merge
Password-protected or damaged PDFs are the usual cause of a failed merge. Remove the password in the program that created the file, save a fresh copy, and add it again. If one file is above 50MB, the tool warns you and refuses it, so shrink it with the PDF Compressor or cut out the pages you need with the PDF Splitter first.
Keeping the final file manageable
The merged file is roughly the sum of its parts, so combining several large scans can produce something too big to email. Check the total size shown before merging, and compress the output afterward if needed. Bookmarks, form fields and other interactive features from the originals may not survive in the combined document, so keep your source files until you have checked the result page by page.
Finally, give the downloaded file a descriptive name right away. The default name is based on the first file in your list, and it is easy to confuse with the original later.
For long projects, merge in stages. Combine a chapter at a time, check each result, then merge the checked pieces. A mistake found at the end is far cheaper to fix when you only have to redo one stage.
Frequently Asked Questions
Are my files uploaded when I merge them?
No. The page states that merging happens privately in your browser, and the documents never leave your device. The pages are read into memory, copied into one new PDF, and offered as a download.
How many PDFs do I need to start?
You need at least two PDF files to combine. After selecting them, you can use the Add More PDFs button to include further files, or Clear All to empty the list and start over with a new selection.
Will my original files be changed?
No. Merging creates a new PDF and leaves the source files as they were. Once the merged file is ready, you can download it, or choose Merge Another Document to begin a new job with different files.
Can I move a file after adding it?
Yes. Each file in the Merge Sequence list has arrows for moving it up or down, and the top file is merged first. Adjust the order until it looks right, then press Merge PDFs Now.