Merge PDF
Combine multiple PDF files into one document. Drag to reorder before merging.
Drag & drop files here
or tap to select files
Tap anywhere to browse
How to Merge PDF Files
Upload PDFs
Drag & drop your PDF files or tap to browse. Add as many files as you need.
Reorder Pages
Drag the PDF cards to arrange them in your preferred order before merging.
Download Merged PDF
Click Merge and instantly download all your PDFs combined into one file.
Why Use ModifyPDF to Merge PDFs?
The simplest and most reliable free PDF merger online.
100% Private
Files are deleted immediately after merging. Never stored on our servers.
Instant Merge
Combine multiple PDFs in seconds. No waiting, no queues.
Drag to Reorder
Rearrange your PDFs in any order before merging with simple drag and drop.
Unlimited Files
Merge as many PDFs as you need into a single, organized document.
Works on Mobile
Fully optimized for phones and tablets. No app or software needed.
Free Forever
No sign-up, no watermarks, no limits. Completely free to use.
Popular Use Cases
Reports
Contracts
Assignments
Invoices
Frequently Asked Questions
ModifyPDF — Free online PDF tools. No sign-up required.