How to Merge PDF Files in the Right Order
Prepare, combine and verify PDF documents without losing track of page order.
Combining PDFs is straightforward when you decide the order before uploading. The resulting document follows file order, followed by page order inside each file. A three-page file placed first contributes the first three pages of the merged output.
Prepare the documents
Rename local copies with a short numeric prefix, such as 01-cover.pdf, 02-report.pdf and 03-appendix.pdf. This makes the intended sequence easier to see. File names are a preparation aid; always inspect the displayed upload list because device file pickers can return a different order.
Combine in iPDF
- Open Merge PDF and choose 2–10 PDFs with a combined size up to 20 MB.
- Read the numbered file list below the upload box.
- If the sequence is incorrect, select the files again in the required order. The current interface does not include drag-to-reorder controls.
- Click Merge PDFs and download the result within 10 minutes.
Check the output
Add the page counts of your input documents and compare that total with the merged file. Inspect the boundary between documents: the last page of one file should be followed by the expected first page of the next.
Mixed page sizes and orientations can remain mixed after merging. That can be correct for screen reading, but review printer settings before printing the final document. Merging combines pages; it does not compress large source images or standardize every page’s paper size.
When a file fails
Use valid, unprotected PDFs. A file renamed from another extension is not a PDF. If one document is damaged, obtain a fresh export from the source application. For more than ten files, create smaller groups, save the results locally and combine those results while respecting the upload limit.
If only part of a source document belongs in the final file, use Split PDF first. Keep the originals locally: iPDF does not retain a file history or permanent document library.