Merge multiple PDF files into one
Drag and drop your PDF files, reorder them as needed, and merge them into a single document. Fast, secure, and completely free to use.
Drag and drop PDF files here or click to select
You can upload multiple files at once
Common Use Cases for Merging PDFs
Business Contracts
Combine multiple contract pages, terms, and addendums into one complete agreement
Invoices & Reports
Merge monthly invoices or quarterly reports into a single document for accounting
Presentations
Combine slides from different sources into one cohesive presentation
Student Assignments
Merge research papers, references, and appendices into one submission file
Legal Documents
Combine evidence, exhibits, and supporting documents for court submissions
Portfolio
Create a comprehensive portfolio by merging your best work samples
Merge PDF Features
Unlimited Merges
Merge as many PDFs as you need - no daily limits or restrictions
Preserve Quality
Original PDF quality is maintained - no compression or quality loss
Drag & Drop Reordering
Easily rearrange files before merging with intuitive drag-and-drop interface
Batch Processing
Merge up to 50 PDF files at once, each up to 100MB in size
How to Merge PDF Files Online
1
Upload Your PDF Files
Click the upload area or drag and drop your PDF files. You can select multiple files at once. Each file can be up to 100MB.
2
Arrange Files in Order
Drag and drop the uploaded files to arrange them in the order you want them to appear in the final merged document.
3
Click Merge PDFs
Press the 'Merge PDFs' button. The merging process typically takes 10-30 seconds depending on the number and size of files.
4
Download Merged PDF
Once merging is complete, click the download button to save your combined PDF document to your device.
PDF Ninja Merge vs Alternatives
| Feature | PDF Ninja | Online Services | Premium Tools |
|---|---|---|---|
| Price | Free | $19.99/mo | $9/mo |
| Files uploaded | No | Yes | Yes |
| Max files per merge | 50 | Unlimited | 20 |
| Processing time | 10-30s | 1-2 min | 30-60s |
| Quality loss | None | None | Possible |
| Watermarks | None | None | Yes (free) |