IQ PDF Manager
Task guide · Merge

How to merge multiple PDF files into one well-organised document

Combining files takes seconds. Producing a combined PDF that a reader can follow — in the right order, without stray blank pages or sideways scans — takes a little planning. Here's a workflow that works for applications, reports and paperwork.

Updated September 2026 · IQ PDF Manager guides

1. Decide the order from the reader's point of view

The right order is the one the recipient expects, not the order in which you collected the files. A few conventions:

  • Applications: cover letter → CV/résumé → qualifications → references or supporting documents.
  • Expense claims: claim form or summary → receipts in date order.
  • Reports: title page → contents → chapters → appendices.
  • Anything with instructions: follow the checklist you were given, item by item. Reviewers often tick through it page by page.

Rename the files with number prefixes (01-, 02-…) so they appear in order when you add them all at once to Merge PDF.

2. Prepare each file before merging

It's much easier to fix problems in a short source file than in a 60-page merged one.

  • Trim. If you only need two pages of a 30-page statement, extract them first.
  • Remove blanks. Delete empty pages left by double-sided scanning with Delete PDF Pages.
  • Fix orientation. Rotate sideways pages in the source file.
  • Convert photos. Documents you photographed need to become PDFs first — convert them with JPG to PDF.
  • Unlock protected files you're entitled to. Password-protected PDFs can't be merged reliably; save an unprotected copy from your PDF software.

3. Merge and read the summary

Add the prepared files, confirm the order in the list, and merge. The result screen shows the total number of pages. Add up the pages you expect — if the numbers don't match, a file is missing or duplicated. That one check catches most merging mistakes before anyone else sees them.

Mixed page sizes, orientations and scans

Merging keeps every page exactly as it was, so a combined file may contain A4 and US Letter pages, portrait and landscape pages, and crisp exported text next to greyish scans. That's normal and acceptable for most purposes. A few practical notes:

  • Printing: enable "fit to page" so pages of different sizes print on one paper size.
  • Landscape pages: should stay landscape. Don't rotate a wide table to portrait just to match — it will display sideways.
  • Size: scans are heavy. If the merged file is over your limit, compress it once at the end rather than compressing each part separately; see how to reduce PDF file size.

4. Check before you send

  • Scroll through at thumbnail size: are any pages sideways, blank or duplicated?
  • Is the first page the one the reader should see first?
  • If the documents had fillable fields or bookmarks, do they still work? These document-level features don't always survive merging, so fill forms before merging and check the result.
  • Is the file name meaningful? merged.pdf tells the recipient nothing; Jane-Doe-application.pdf does.

Questions and answers

Yes — extract the pages you need from each file first, then merge the extracted files.

Usually after. Compressing the finished file once is simpler and lets you check the final size against your limit.