How to Merge Scanned Documents into One PDF

The problem with scans

Scanners and scanning apps love producing one file per page. You end up with scan_001.pdf through scan_014.pdf, and the recipient — a landlord, an HR department, a government portal — wants exactly one document. Attaching fourteen files is messy, and half the portals out there only accept a single upload anyway.

Combine everything in order

A PDF merger joins your files into one document without touching the content — each page is copied over exactly as scanned, so nothing is re-compressed or degraded.

1. 01Open the free Merge PDF tool.
2. 02Drag in all your scans — up to 20 files, 100 MB each.
3. 03Drag the file cards into the right order; the numbers show the final sequence.
4. 04Name the output file (for example "rental-application.pdf") and click Merge.
5. 05Download one clean, ordered PDF.

Tips for a professional result

Name the merged file something the recipient will recognize — "jane-doe-visa-documents.pdf" beats "merged.pdf". If some scans came out sideways, fix them with the Rotate tool before merging so every page reads the same way. And if the combined file ends up too large to email, one compression pass will usually bring it under the limit.