Merge Files
Joins two PDF files into one: the pages of the first file, then the pages of the second.
The Merge Files action joins two PDF files into a new one, for example an invoice and its annex. The new file holds every page of the first PDF followed by every page of the second.
Add the action
In the Process Designer toolbox, open PDF and pick Merge Files (or type Merge Files in the search box).

Inputs and outputs
| Field | Direction | Type | Required | What to put / what you get |
|---|---|---|---|---|
| First Pdf | Input | File | Yes | The PDF whose pages come first. |
| Second Pdf | Input | File | Yes | The PDF whose pages come after. |
| Merge Result | Output | File | Yes | The merged PDF. |
Example
First Pdf invoice.pdf (3 pages), Second Pdf annex.pdf (1 page) โ Merge Result a 4-page PDF named invoice.pdf_annex.pdf.pdf.
Good to know
- The output name is built from both input names, extensions included: first name
_second name.pdf. Rename it with a file action if you need a clean name. - Both files must have the
.pdfextension. Otherwise the step fails withFirst Pdf extension should be '.pdf', found => โฆ(orSecond Pdf โฆ). - The action merges exactly two files. To merge more, chain several Merge Files actions, or loop over a list and merge the running result with the next file.

