How to Merge PDF Files Online Free

Why Merge PDF Files?

Merging PDFs lets you combine multiple documents into one clean file — perfect for:

• Combining a CV and cover letter for job applications
• Merging invoices or receipts into a single statement
• Combining chapters of a document
• Sending multiple scanned pages as one attachment

How to Merge PDFs (Step by Step)

Step 1: Open the PDF Merge tool Go to the Kinsutools Merge PDF page. No account or software needed.

Step 2: Upload your PDFs Click "Add Files" or drag and drop. You can add as many PDFs as you need.

Step 3: Set the order Drag the files to arrange them in the order you want. The first file becomes the first pages of the merged document.

Step 4: Merge and download Click "Merge PDFs". Your combined PDF is ready instantly. Click Download to save it.

Tips for Merging PDFs

• Page order matters — check the order before merging, as rearranging after requires splitting and re-merging
• File size — the merged PDF size is roughly the sum of all input files. Compress if needed after merging.
• Password-protected PDFs — remove passwords before merging (most PDF editors can do this)
• Orientation — portrait and landscape pages can be mixed in a single PDF

Common Use Cases

• Job applications — merge CV, cover letter, and certificates into one file
• Invoicing — combine monthly invoices into a single PDF for accounting
• Legal documents — merge contracts, addendums, and signatures
• Reports — combine sections from different team members

Related Guides

• How to Split a PDF
• How to Compress a PDF