Batch Merge PDFs
Combine multiple PDF files at once with OmnisPDF Pro. Upload dozens of documents and merge them into a single PDF in one operation — save hours of manual work.
Batch Processing Requires Pro
Free users can merge files one at a time. Upgrade to Pro for batch merging, larger files, and unlimited conversions.
When you need to combine dozens of PDF files into one document, doing it one at a time is painfully slow. OmnisPDF Pro's batch merge feature lets you upload multiple files at once, arrange them in order, and merge them all in a single operation.
- ✓ Upload and merge multiple PDFs simultaneously
- ✓ Arrange files in any order before merging
- ✓ Files up to 200MB each with Pro, 1GB with Business
- ✓ Per-file progress tracking and Download All as ZIP
- ✓ Works on Mac, Windows, iOS, Android, and Linux
Merge Invoices and Receipts in Bulk
Accountants and bookkeepers often need to combine months of invoices or receipts into a single PDF for filing or audits. With batch merge, upload all your invoice PDFs at once and combine them into one organized document in seconds.
Combine Reports and Presentations
Assembling a quarterly report from multiple departments? Upload all the individual reports and merge them into a single comprehensive document. Perfect for board presentations, project documentation, and multi-author reports.
Process Document Batches Efficiently
Whether you're combining contracts, consolidating research papers, or assembling training materials, batch merge eliminates the tedious process of merging files one by one. Upload everything at once and let OmnisPDF handle the rest.
How to Batch Merge PDFs
Open Merge PDF and select multiple files at once (Pro feature).
Arrange the files in your preferred order.
Click Merge and download your combined PDF.
Frequently Asked Questions
How do I batch merge multiple PDFs at once?
With OmnisPDF Pro, upload multiple PDF files simultaneously to the Merge PDF tool. Select all the files you want to combine, arrange them in order, and merge them into a single document in one operation.
How many PDFs can I merge at once with batch processing?
Pro users can upload and merge dozens of PDF files in a single batch operation. There is no fixed file count limit — the main constraint is the total file size, which can be up to 200MB per file for Pro users, or up to 1GB per file for Business users.
Is batch merge available on the free plan?
Free users can merge files one at a time with files up to 25MB. Batch processing — uploading and merging multiple files simultaneously — is a Pro feature available for $7.99/month.
What is the maximum file size for batch merging?
Pro users can upload files up to 200MB each. Business users can upload files up to 1GB each. Free users are limited to 25MB per file. For very large documents, consider compressing them first with OmnisPDF's Compress PDF tool.
Can I choose the order of merged PDFs in a batch?
Yes. When you upload multiple files for batch merging, you can arrange them in your preferred order before combining. The final merged PDF will follow the sequence you set.
Does batch merging affect PDF quality?
No. Batch merging preserves the original quality of all your PDF files. Text, images, formatting, fonts, and interactive elements remain unchanged in the merged output.