Merging PDFs is one of the most common document chores: stitching a signed contract onto its cover letter, assembling monthly invoices into one file, or combining scanned pages that came out as separate documents. Here's how to do it cleanly and get the page order exactly right.
How to merge PDF files
- Open the Merge PDF tool.
- Add every file you want to combine — drag them in together or one at a time.
- Drag the files (or individual pages) into the order you want. Order matters: the tool combines top to bottom.
- Click merge and download your single, combined PDF.
Get the order right the first time
The most common mistake is uploading in the wrong sequence and only noticing after download. Two habits prevent it:
- Name files with a leading number (01-cover, 02-contract, 03-appendix) so they sort predictably before you even upload.
- Reorder at the page level when documents interleave — for example, placing a signature page immediately after the clause it belongs to rather than at the very end.
Common ways people use merge
- Contracts: cover letter + agreement + signed signature page into one record.
- Bookkeeping: a month of receipts or invoices combined for a single upload to your accountant.
- Scanning: a multi-page document that your scanner saved as separate one-page PDFs.
- Applications: résumé + cover letter + portfolio merged so a recruiter opens one file, not three.
After merging
If the combined file is large — common when you merge scans — run it through Compress PDF once at the end to keep it email-friendly. And if you merged the wrong pages, Split PDF lets you pull them back out. Start now with the free Pdfblizz merge tool; uploads on the free tier are deleted within an hour.