How to Combine Multiple PDF Files into One for Free

Complete step-by-step guide for all platforms - Mac, Windows, Linux, mobile, and online tools

Need to merge a bunch of PDFs into one clean file—without paying for expensive software? You've got options. This guide covers fast, free ways to combine PDFs on all your devices.

Quick Platform Guide

Mac

Use Preview (built-in)

Windows

PDF24 Creator (free, offline)

Online

PDF24 Tools, Sejda, iLovePDF

iPhone/iPad

Shortcuts app

Android

Xodo or PDF Utils

Linux

PDF Arranger or command line

Mac: Merge PDFs with Preview

MBuilt-in & Free

Use Mac's Preview app - no additional software needed

1 Open first PDF in Preview

Double-click your PDF file to open it in Preview.

2 Show thumbnails

Go to View > Thumbnails to show page previews.

3 Add PDFs

Drag additional PDFs from Finder into the sidebar.

4 Reorder pages

Drag thumbnails to arrange pages as needed.

5 Export

Go to File > Export as PDF to save.

Tip: Press ⌘ + L or ⌘ + R to rotate selected pages.

Windows: PDF24 Creator

WFree & Offline

PDF24 Creator works without internet and adds no watermarks

1 Install PDF24

Download and install PDF24 Creator.

2 Open Toolbox

Launch PDF24 and select Merge PDF.

3 Add files

Drag your PDF files into the window or click Choose files.

4 Reorder & merge

Drag files to reorder, then click Merge.

5 Save

Click Save to download your merged PDF.

Online PDF Mergers

OQuick Browser Tools

Fast solutions for non-sensitive documents

Privacy Note: Avoid uploading sensitive documents to online tools.

1 Choose a tool

PDF24 Tools Sejda iLovePDF

2 Upload files

Drag and drop your PDF files or use the file selector.

3 Arrange order

Drag files to arrange them in your preferred order.

4 Merge & download

Click Merge and download your combined PDF.

iPhone & iPad

iShortcuts App Method

Use Apple's Shortcuts app - no additional downloads needed

1 Get shortcut

Open Shortcuts app, search Gallery for "Combine PDFs", and add it.

2 Select files

In Files app, select PDFs, tap Share, choose Combine PDFs.

3 Save

Choose order if needed, then save to Files or share.

Alternative: Xodo app also merges PDFs for free.

Android Devices

AFree Apps

Xodo and PDF Utils offer free PDF merging

1 Install app

Install Xodo or PDF Utils.

2 Open merge tool

In Xodo: Tap menu > Merge PDFs. In PDF Utils: Tap Merge/Extract > Merge PDFs.

3 Add & arrange

Select your PDF files and arrange them in order.

4 Merge

Tap Merge and save the result.

Linux Systems

LGUI & Command Line

PDF Arranger for visual editing or command line tools

1 Install PDF Arranger

Install from your package manager:

Ubuntu/Debian: sudo apt install pdfarranger

Fedora: sudo dnf install pdfarranger

2 Open & import

Open PDF Arranger and import your PDF files.

3 Reorder pages

Drag pages to arrange them as needed.

4 Export

Go to File > Export to save merged PDF.

Command line option: Use pdfunite file1.pdf file2.pdf merged.pdf

Tips & Troubleshooting

Quality: Merging doesn't reduce quality. Use proper merge tools, not "Print to PDF".

Protected PDFs: You need the password to unlock before merging.

Mixed page sizes: Use PDFsam to normalize sizes or rotate pages before merging.

Large files: Compress after merging with PDF24 or Sejda tools.

Images to PDF: Convert images to PDF first, then merge.

Frequently Asked Questions

Will merging add a watermark? +

No, the tools mentioned (Preview, PDF24, PDFsam, etc.) don't add watermarks in their free versions.

Is online merging safe? +

For non-sensitive documents, yes. For private files, use offline tools like Preview or PDF24 Creator.

Why do pages rotate after merging? +

Scans often have orientation flags. Rotate pages before merging using your tool's rotate function.

Can I merge only specific pages? +

Yes, PDFsam and Preview allow you to select specific page ranges to merge.

© 2023 PDF Tools Guide. All rights reserved.

Complete guide to merging PDF files for free on all platforms.