beginner5 min readUpdated August 18, 2026
By PDFilio Editorial Team
How to Merge PDFs for an Online Submission
Combine supporting documents into one PDF while planning the correct order and checking the final file before submission.
# How to Merge PDFs for an Online Submission
Some application and submission workflows ask for related documents in one PDF. Merging can make the package easier to review when the submission rules allow it.
## Steps
1. Confirm which documents the submission requires.
2. Decide the page order, such as cover page, application, supporting documents, and attachments.
3. Open PDFilio's Merge PDF tool.
4. Upload the PDFs and arrange them in the required order.
5. Start the merge.
6. Review the combined PDF from beginning to end.
## Before uploading
Check that all pages are present, readable, correctly oriented, and in the required order. Also confirm the final file size and file type meet the submission rules.