How to combine multiple PDFs into a single file.
Combining PDFs is useful when you have separate certificates, forms, invoices, or notes and need to deliver a single document. Before combining, decide the order and verify that all files open correctly.
Before combining the documents
Rename or identify the files according to the order in which they should appear. If the recipient entity requires a specific sequence, follow that instruction instead of ordering by download date.
Keep the originals and avoid including unnecessary pages. The combination does not review whether the file is complete or meets administrative requirements.
What to review after combining them
Open the resulting file and check the first and last pages, content continuity, and page orientation. If you mixed different sizes, it's normal for the final PDF to retain different dimensions.
If the document contains private information, also review the metadata and visible content before sending it.
Common questions
Can I combine PDFs with different page sizes?
Yes, pages can retain their original dimensions within the same document.
Does merging reduce the PDF weight?
Not necessarily. Combining files may produce a larger document; if you need to reduce it, review a separate optimization tool.