PDF Tools
Merge PDF
Combine multiple PDFs into one, in the order you choose.
Drop PDFs or click to browse
Add as many files as you need
Files are processed on your device. Nothing is uploaded to a server.
Merge PDF: what this tool does
Combine multiple PDF files into one document and arrange their order before creating the final file. This is useful for applications, reports, invoices, certificates, assignments, and scanned paperwork.
How it works
- 01
Upload two or more PDFs you want combined into a single file.
- 02
Reorder them using the up/down controls to set the final page sequence — order matters, since it becomes the merged document's page order.
- 03
Download the merged file, with every page from every source PDF included in sequence.
When this tool is useful
- Combining several documents into one submission.
- Putting a cover letter, resume, and certificates into one PDF.
- Combining separate chapters or scanned sections.
Supported formats
What to know before you use this tool
Merging combines multiple PDF files into one document while preserving the page sequence you choose. It is useful when a submission, report, or archive is spread across several separate PDFs.
Good use cases
- Combining application documents
- Joining reports, invoices, or certificates
- Keeping related scans in one file
A sensible workflow
- Decide the final reading order before merging.
- Keep a copy of the source PDFs in case the order needs to change.
- Open the merged result and check page count, orientation, and important pages before sharing.
Things worth checking
- Merging is different from compression: it combines documents but does not necessarily reduce their size.
- Password-protected or damaged PDFs may need to be fixed before they can be read.
- Mixed portrait and landscape pages are allowed, but should be checked in the final document.
Continue learning
Tips for better results
- Put the most important opening page first.
- Check the final page count for accidental duplicates.
- If a source PDF is password protected, unlock it with the required password before merging.
What to expect
Encrypted or damaged source PDFs may not be readable by the browser PDF engine. Complex interactive PDF features may not behave exactly like they do in dedicated desktop PDF software.
Frequently asked questions
Can I merge password-protected PDFs?
Not directly — a locked PDF needs its password removed first before it can be read and merged. Once unlocked, merge normally and re-add protection to the final file if needed.
Is there a limit on how many PDFs I can merge?
No fixed limit, though very large combined page counts will take longer to process since everything happens on your device rather than a server.
Does merging affect the quality of the original pages?
No — pages are copied into the new file as-is, with no re-rendering or recompression involved.
Common mistakes to avoid
Not checking page order before merging
The merged file follows the order the PDFs were added in — if that's not the order a form or reader expects, the result reads out of sequence even though nothing is technically wrong with it.
Merging PDFs with inconsistent page sizes without checking
Combining a mix of portrait and landscape, or different page-size documents, into one file is completely normal, but the discrepancy is easy to miss until someone else opens it. Scroll through the merged result once before sending.
Merging instead of extracting when only certain pages are needed
If the goal is actually to pull specific pages out of one document (not combine multiple documents into one), extracting is the right tool, not merging.