Merge PDF
Combine multiple PDFs into one file.
Add PDF files to merge
Click to browse or drag and drop
What is a PDF merger, and who needs it?
A PDF merger joins two or more PDF files into one document, with the pages of each file placed one after the other. Instead of attaching five separate files to an email or an online form, you send a single, tidy PDF.
It helps job seekers who must upload one file with a resume, certificates and a cover letter, students combining assignment parts, and anyone applying for a loan or visa who needs to send several documents together. Accountants and small shop owners also use it to bundle monthly invoices. Everything runs in your browser, so your files are not sent to our servers. More utilities are on our PDF Tools page.
How it works
- Add at least two PDF files by clicking the box or dragging them in
- The files appear in a list, so you can check what will be combined
- When you press the merge button, your browser copies the pages of every file into one new PDF using the open-source pdf-lib library
- Total pages in the result = pages of file 1 + pages of file 2 + and so on
- Rough size of the result = the combined size of your files, as nothing is compressed
Worked example
Imagine you are applying for a post and the portal wants one PDF with your education documents. You have a Class 10 marksheet of 2 pages (about 400 KB), a Class 12 marksheet of 2 pages (about 600 KB) and a degree certificate of 1 page (about 900 KB). Add all three and merge. The result has 2 + 2 + 1 = 5 pages and a size of roughly 400 + 600 + 900 = 1,900 KB, or about 1.9 MB.
If the portal allows only 2 MB, you are just inside the limit. If it allows 1 MB, you will need smaller source files before merging, because this tool does not compress. Check the order shown in the file list before you merge, so that the final document reads the way the reviewer expects.
Frequently asked questions
Are my PDF files uploaded anywhere when I merge them?
No. The merging happens inside your browser, so your files stay on your device. This is useful for documents such as bank statements, salary slips and ID proofs. Even so, it is wise to avoid using any website for sensitive files on a shared or public computer.
How many PDFs do I need to merge?
You need at least two PDF files. The button stays switched off until you have added two, and you can add more than two if you want to combine several documents in one go.
Will merging reduce the quality of my PDFs?
Merging copies the pages of each file into one new document, so the text and images should look the same as before. The tool does not compress anything, which also means the merged file will not be smaller than the files you put in.
Can I merge a password-protected PDF?
Usually not. A file that is locked with a password or encryption may fail to merge. Remove the protection in the program you used to create it, save a fresh copy, and then add that copy here.
How do I merge images and PDFs together?
This tool accepts only PDF files. If some of your pages are photos or scans in JPG or PNG format, first turn them into a PDF with our Images to PDF tool, and then merge the resulting files here.
Limitations and accuracy
This tool only joins whole PDF files. It does not split files, delete or rotate pages, compress the output or edit any text. Encrypted or damaged PDFs may not merge, and very large files can be slow or fail on a phone or an older computer because everything is processed in your device's memory. Some features of the original files, such as form fields, bookmarks or digital signatures, may not carry over to the merged copy. The sizes in the example are rough estimates. Always open the merged PDF and check every page before you submit it anywhere important. This tool is for information only.