Merge PDF Files
Combine multiple PDF documents into a single file. Drag to reorder, preview pages, and view the result in your browser. No uploads, completely private.
Private
Instant
No Limits
Works Offline
Drop PDF files here or click to browse
Drag to reorder after adding
How it works
1Drop or select multiple PDF files
2Drag to reorder the merge sequence
3Click Merge to combine in-browser
4Preview every page, then download
Features
Files never leave your device
Drag-to-reorder before merging
Page thumbnail preview
Editable output filename
Works offline after first load
How do I merge PDF files online for free?
Click the drop zone above or drag your PDF files onto it. Once you have added at least two files, click the "Merge PDFs" button. The tool combines them in your browser without uploading anything to a server, so the process is instant and completely free.
Can I reorder pages before merging PDFs?
Yes. After adding your files, drag and drop them into the order you prefer. The merged output will follow the sequence shown in the file list. You can also remove individual files if you change your mind.
Is there a file size or page limit for merging?
There is no hard limit enforced by this tool. Because merging happens locally in your browser, performance depends on your device memory. Most users can comfortably merge dozens of files totaling hundreds of pages without issues.
Are my PDF files kept private during merging?
Absolutely. Your files never leave your device. All processing runs entirely in the browser using client-side JavaScript. No data is sent to any server, making this tool safe for sensitive or confidential documents.
What file types are supported for merging?
Only valid PDF files (.pdf) are accepted. If you attempt to add a non-PDF file, it will be rejected with a warning message. The tool validates both the file extension and MIME type before processing.