Merging PDFs is one of those tasks that feels like it should be built into every operating system, but rarely is in a way that's actually convenient. Whether you're combining scanned pages of a signed contract, stitching together a multi-part report, or building one PDF from several invoices, the process is the same.
When you'd want to merge PDFs
- Combining scanned pages from a multi-page document that were scanned as separate files
- Assembling a final report from sections written or exported separately
- Bundling supporting documents (ID, proof of address, signed forms) into a single file for a submission that only accepts one attachment
- Putting together a portfolio or a set of certificates into one shareable PDF
How to merge PDFs online, step by step
- Open the Merge PDF tool.
- Upload all the PDF files you want to combine.
- Reorder them if needed - the order you arrange them in is the order they'll appear in the final file, so double-check this before merging.
- Merge and download the single combined PDF.
Getting the order right the first time
The most common mistake when merging PDFs isn't a technical one - it's uploading files in the wrong order and not noticing until after you've already sent the final document. Name your source files with a number prefix (01-cover.pdf, 02-body.pdf, 03-appendix.pdf) before uploading if you want the order to be obvious at a glance, rather than relying on remembering it.
A quick note on file size
Merging doesn't compress anything - a merged file is roughly the sum of its parts. If the combined PDF ends up too large to email or upload afterward, running it through a PDF compressor afterward will usually bring it back down without hurting readability.