Decide the document order first
Merge PDF places each complete file after the previous one. For an application, you might put the form first, supporting documents second and appendices last. Rename originals so they are easy to recognize in the list.
For separate front-side and back-side scans, interleave pages instead: merging produces A1, A2, B1, B2; interleaving produces A1, B1, A2, B2.
Create the copy step by step
The visible file list determines the output order. Do not assume your device’s file picker supplies files in the order you expected.
- Add two or more PDFs and wait for them to load.
- Use the arrow buttons to set the final order and remove accidental repetitions.
- Select Merge PDF and save the download.
- Open the copy and check the first page, each file boundary and the last page.
What to check if something fails
An encrypted, damaged or empty file may not open. Use a valid unprotected copy obtained legitimately. On a phone with limited memory, work in smaller batches.
Originals are preserved and processing takes place in your browser. Check forms, links, annotations and signatures: copying pages may change special features even when the appearance is correct.