How to Combine Multiple PDF Files
Combining tends to happen under deadline — an application that wants one file, or a claim that needs every receipt in a single attachment. A little care with order and size avoids a resubmission.
4 min readUpdated 14 September 2026Dockeazy editorial
The short answer
Add all the files, arrange them in the order you want, then combine and download. Getting the order right before combining saves reordering pages afterwards.
Merge PDF
Combine multiple PDFs into one ordered document.
Step by step
- 1Gather every file firstMissing one means combining again from scratch. A quick checklist against whatever you are submitting is worth the minute it takes.
- 2Add them together and set the orderDrag files into sequence. If a submission specifies an order, follow it exactly — reviewers often work through documents in the order listed.
- 3Combine and reviewOpen the result and check the page count matches the sum of the originals. That catches a dropped file immediately.
- 4Compress if there is an upload limitCombining adds sizes together, so a set of scans can easily exceed a portal's cap.
Mixing scans with text documents
There is no problem combining them — the pages simply sit next to each other in the same file.
One consequence is worth knowing: the combined document will be partly searchable and partly not. Text pages stay selectable, scanned pages remain images. Running OCR afterwards makes the whole document searchable.
Larger batches
The free plan covers up to 5 files and 50 pages per job, which handles most everyday combining. Pro raises both limits considerably.
For a very large set, combining in groups and then combining the groups is often easier to check than doing everything in one pass.
Before you send it
Check the page count, confirm the first and last pages are what you expect, and make sure the file opens cleanly.
If the document needs to stay private in transit, add a password before attaching it.
Frequently asked questions
How many PDFs can I combine at once?
The free plan covers up to 5 files and 50 pages per job. Pro raises both limits considerably.
Can I combine scans and normal PDFs together?
Yes. Only the scanned pages will lack selectable text, which OCR can fix afterwards.
What if the order comes out wrong?
Open the combined file in Organize PDF and drag individual pages into place.
Does combining reduce quality?
No. Pages are copied as they are unless you deliberately compress the result.
Related tools
Keep reading
Ready to try it?
Nothing to install and no account needed to start.
Open Merge PDF