Merge Multiple PDFs Into One File
Combine 2, 5, or 10+ PDF files into a single document. Upload your files, set the order, and download one merged PDF — fast, free, and browser-based.
Drop your files here
or click to browse files
Supported formats: .pdf
Whether you need to merge two contracts or combine dozens of report chapters, OmnisPDF handles it all. Upload your PDF files, arrange them in the right order, and get one clean merged document. Pro users unlock batch processing for merging large numbers of files at once.
- ✓ Merge 2, 5, 10, or 50+ PDFs into one document
- ✓ Batch processing available for Pro users
- ✓ Drag and drop to control file order
- ✓ No quality loss — all pages stay exactly as they are
- ✓ Works on any device with a browser
Merge Dozens of Files With Batch Processing
Need to combine a large batch of invoices, reports, or certificates? Pro users can select multiple files at once and merge them in a single operation. No more merging two at a time.
Keep Your Pages in the Right Order
After uploading, drag and drop files to set the exact sequence. OmnisPDF preserves your chosen order so every chapter, section, or appendix appears exactly where it should.
Merge Then Compress for Easy Sharing
Merging many PDFs can result in a large file. After combining, use OmnisPDF's Compress PDF tool to shrink the result for email, uploads, or cloud storage without losing quality.
How to Merge Multiple PDFs
Upload or drag and drop all your PDF files into OmnisPDF.
Drag files to rearrange them in your preferred order.
Click Merge and download your single combined PDF.
Frequently Asked Questions
How do I merge multiple PDFs into one file?
Upload all your PDF files to OmnisPDF, arrange them in the order you want, and click Merge. Your combined PDF will be ready to download in seconds.
Can I merge more than 10 PDFs at once?
Yes. Pro users can merge large batches of PDFs with batch processing. Free users can merge files one at a time and combine the results.
Does merging PDFs change the file order?
No. OmnisPDF preserves the exact order you set. Drag and drop your files to rearrange them before merging.
Is there a file size limit when merging multiple PDFs?
Free users can upload files up to 25MB each. Pro users get a 200MB per-file limit, which handles even the largest documents.
Will the merged PDF be too large to email?
It depends on the total size of your files. If the merged PDF is too large, use OmnisPDF's Compress PDF tool to reduce the file size before sending.
Can I merge PDFs on my phone or tablet?
Yes. OmnisPDF is fully browser-based and works on iPhone, iPad, Android, and any device with a modern browser.