Combine PDF files into one document

Sending five attachments when one would do is a small annoyance for you and a bigger one for the person receiving them. They have to open each file, guess the order, and hope nothing is missing. When you combine PDF files into one, you decide the order once, and everyone sees the same complete document — whether they read it on a phone, print it or upload it to a portal that only accepts a single file.

The tool above is built around ordering. Every file shows a thumbnail of its first page and a number, so you can see the final sequence at a glance and fix it before you merge.

How to combine several PDFs into a single file

1. Select all the files at once In the file picker, hold Ctrl (Windows) or ⌘ (Mac) to select several PDFs, or drag a whole selection from your folder onto the upload box.
2. Set the order Drag cards into place, use the arrow buttons, or click Sort A–Z if your file names are numbered.
3. Remove pages you don't need Type a range under any file — 2- skips a cover page, 1-4,7 skips pages 5 and 6.
4. Combine and download Click Merge PDF. The new file is named after your first document so it's easy to find in Downloads.

Common documents people combine

• Job and university applications: CV, cover letter, transcripts and certificates as one file, because many application portals accept only a single upload.
• Visa and rental paperwork: passport scan, bank statements, payslips and reference letters in the order the checklist asks for.
• Accounting: a month or a year of invoices and receipts, ready for your accountant.
• Course material: weekly lecture slides combined into one revision file you can search.
• Client deliverables: proposal, scope, price sheet and terms sent as one professional document.

Getting the order right the first time

If you combine documents often, a simple naming habit saves the most time: start each file name with a two-digit number — 01, 02, 03 — and use Sort A–Z. Two digits matter: without them, computers sort "10" before "2".

For checklists (visas, mortgage applications, grant submissions), keep the checklist open next to the tool and match it top to bottom. Reviewers process documents faster when they arrive in the order they asked for, and you avoid the "please resend in the correct order" email.

Tip: After merging, use Preview and scroll through the result once. It takes ten seconds and catches the most common mistake — a duplicate or missing page.

Other ways to combine PDFs (and when they make sense)

On a Mac, the built-in Preview app can combine PDFs by dragging pages between thumbnails in the sidebar. On iPhone and iPad, the Files app has a Create PDF action when you select several files. Adobe Acrobat's paid version also merges files. These are fine if you're already in those apps. Windows has no built-in way to combine PDFs, which is where an online tool helps most — and on every platform, an online tool is the quickest option when you also want page ranges or need to mix in photos. Our guide to combining PDFs on Windows, Mac and phone walks through each method.

Frequently asked questions

Last updated 13 October 2026 by The S-PDF team.