Receiving or sending a single document rather than a series of separate files simplifies a lot of everyday tasks: a job application, a rental file, or archiving several supporting documents. Merging PDFs means assembling these files in the order you want, without changing their content.
When should you merge PDFs?
The most common cases are a job application (resume, cover letter, diplomas), an administrative file (ID, proof of address, tax notice), or several separately scanned pages that need to form a single document. A single file is easier to send by email, print, or upload to an online form that only accepts one attachment.
How to merge PDFs step by step
- Open the Merge PDF tool.
- Add your PDF files, one at a time or several at once.
- Reorder them with the arrow buttons if the order you added them in isn't the order you want in the final document.
- Start the merge, check the preview, then download the final document.
The page order inside each original file is always preserved: only the order of the files relative to each other can be changed before merging.
What order should you use for a job application?
A commonly used order is: resume, cover letter, diplomas or certifications, then supporting materials (portfolio, references). This order puts the information a recruiter is most likely looking for first.
What if the merged file is too large?
If the final document exceeds the limit accepted by a form or an email inbox, the Compress PDF tool lets you shrink it after merging, without having to redo the assembly.
Merging files that aren't already in PDF format
If some of your documents are still in Word, Excel, or image format, convert them to PDF first with Word to PDF, Excel to PDF, or JPG/PNG to PDF, before combining them with the rest.
A quick pre-merge checklist
Before merging, it's worth double-checking each file individually: confirm it opens correctly, that pages aren't missing, and that it isn't password-protected. Fixing these issues after the merge means redoing the whole process, so a quick check upfront saves time.
Name your files so the order is obvious
The simplest way to avoid a wrong order is to number the files before you add them, for example 01-resume.pdf, 02-cover-letter.pdf, 03-diploma.pdf. When you drop them into the tool, they line up in the order you intended, and you only need the arrow buttons for the occasional correction. This habit also makes your folder easier to understand a year later.
Mixed page sizes and orientations
Documents rarely come from the same source. A resume may be A4 portrait, a diploma may be a landscape scan, and a receipt may be a narrow strip photographed on a phone. In the merged file, pages generally keep their own size and orientation, so the document can look uneven when you scroll through it. That is normal and usually acceptable for administrative files. If you need a uniform look, for example for a portfolio, create the pages with a consistent layout first: the JPG/PNG to PDF tool can place every image on a centered A4 page.
What to check after merging
- Open the preview and scroll through the whole document, not only the first page.
- Confirm that the number of pages equals the total of the originals.
- Check that no file was added twice and none is missing.
- If one of the original files relied on interactive features such as links or form fields, test that they still behave as you expect, because the merge is designed to assemble pages.
Sensitive documents
Merging often involves identity papers, contracts, or financial records. The tool processes your files in your browser, so they are not sent to a server while you work. Even so, use your own device rather than a shared computer, and delete the downloaded copies once the document has been sent. For a broader set of habits, read our guide on protecting your privacy with online PDF tools.
Frequently asked questions
How many files can I merge at once?+
There's no limit set by the tool; you can add as many PDF files as you need.
Is the page order inside each PDF preserved?+
Yes, each PDF keeps its own internal page order; only the order of the files relative to each other can be changed before merging.
Can I merge password-protected PDFs?+
A protected PDF generally needs to be unlocked before it can be processed by an online merge tool.
Is the result a single downloadable file?+
Yes, you get one PDF file containing all the pages from the documents you added, in the order you chose.