PDF Tools February 12, 2025 · ~5 min read

How to Merge PDF Files Online – Free & Secure

Merging multiple PDF files into one is a daily task for professionals, students, and businesses. This guide shows you how to merge PDFs online for free — securely, without software.

When Do You Need to Merge PDFs?

  • Job applications: Combine your resume, cover letter, and portfolio into one PDF.
  • Invoicing: Merge multiple invoices into a single monthly statement.
  • Reports: Combine chapters or sections from different sources into one document.
  • Legal documents: Courts and agencies often require all related documents in one file.
  • Presentations to clients: Send one professional document instead of multiple attachments.

How to Merge PDF Files Online

1Open the PDF Merge tool.
2Upload 2–20 PDF files using drag and drop or the file picker.
3Arrange files in the correct order by dragging them.
4Click Merge PDFs — all pages are combined in order.
5Download the merged PDF file instantly.
💡 Pro Tip: Name your files alphabetically (01-resume.pdf, 02-cover.pdf) before uploading so they appear in the right order automatically.

FAQ

Is there a file size limit?

Each individual PDF can be up to 50MB, with a maximum of 20 files per merge operation.

Will the merged PDF preserve formatting?

Yes — the merge operation preserves all text, images, fonts, and layout from each source PDF exactly as-is.

Try the Tool Now — 100% Free

No signup. No install. Works in your browser instantly.

🚀 Open Free Online Tool