Need to combine multiple PDF documents into a single file? Whether you're merging reports, combining scanned pages, or assembling a portfolio, merging PDFs is a common task that's easier than you might think.

In this guide, you'll learn how to merge PDF files quickly using free online tools — no software installation needed.

When Do You Need to Merge PDFs?

Here are common scenarios where combining PDFs is useful:

  • Combining scanned documents — Merge multiple scans into one file
  • Creating reports — Combine cover page, content, and appendices
  • Building portfolios — Merge work samples into a single presentation
  • Organizing invoices — Combine monthly invoices into quarterly files
  • Submitting applications — Merge required documents into one PDF

How to Merge PDF Files Online (Step-by-Step)

Follow these simple steps to combine your PDFs:

  1. Open the Merge PDF tool — Free, no registration required
  2. Add your PDF files — Drag and drop multiple files or click to browse. You can add as many files as needed.
  3. Arrange the order — Drag files to reorder them. The first file will appear first in the merged document.
  4. Click "Merge PDF" — The tool combines your files instantly in the browser
  5. Download — Save your merged PDF to your device

Merge Your PDFs Now — It's Free

Combine unlimited PDF files instantly. No watermarks, no file limits.

Merge PDFs Now

Tips for Better PDF Merging

1. Organize Files Before Merging

Name your files with numbers (01_intro.pdf, 02_chapter1.pdf) to keep them in order when you upload multiple files at once.

2. Check Page Orientation

If some pages are rotated incorrectly, use our Rotate PDF tool to fix them before merging.

3. Compress After Merging

Merged PDFs can get large. After combining, use our Compress PDF tool to reduce the file size.

4. Add Page Numbers

For professional documents, add page numbers to your merged PDF using the Page Numbers tool.

💡 Pro Tip: If you only need specific pages from each PDF, use our Extract Pages tool first to pull out just the pages you need, then merge those.

What Happens During PDF Merging?

When you merge PDFs, the tool:

  • Combines all pages from each file in the order you specified
  • Preserves all content, formatting, and images
  • Maintains links and bookmarks where possible
  • Creates a single, unified PDF document

Your original files remain unchanged — the merge creates a new file.

Merging Different Page Sizes

PDFs with different page sizes (A4, Letter, etc.) can be merged together. Each page keeps its original size in the combined document.

If you need uniform page sizes, use our Resize PDF tool to standardize pages before or after merging.

Privacy and Security

Our merge tool processes everything in your browser. Your files never leave your device or get uploaded to any server. This means:

  • Complete privacy for sensitive documents
  • No file size limits
  • Works even without internet (once the page loads)
  • No registration or account needed

Frequently Asked Questions

How many PDFs can I merge at once?

There's no limit. Merge 2 files or 200 — our tool handles it all.

Can I merge password-protected PDFs?

You'll need to remove the password first using our Unlock PDF tool, then merge the files.

Will the quality be affected?

No. Merging combines PDFs without re-encoding, so quality remains identical to the originals.

Can I change the order after uploading?

Yes! Simply drag and drop files to rearrange them before clicking merge.

Related Tools You Might Need

After merging, you might want to:

Conclusion

Merging PDF files is straightforward with the right tool. Whether you're combining a few documents or dozens, our free online tool makes it quick and easy — with no software to install and complete privacy for your files.

Ready to combine your PDFs? Try our free Merge PDF tool now.