PDF Merge — Combine Multiple PDF Files Online
Merge multiple PDF documents into a single file. Drag and drop your PDFs, arrange the order, and download the combined result. 100% client-side — your files never leave your browser.
How to Use the PDF Merge Tool
- Add files — drag and drop PDF files into the drop zone, or click to browse and select multiple files at once.
- Arrange order — drag and drop files in the list, or use the up/down arrows to set the merge order.
- Merge — click "Merge PDFs" to combine all files into a single PDF, then download the result.
Frequently Asked Questions
There is no hard limit on the number of files. The tool is limited only by your browser's available memory. For best results, we recommend merging fewer than 50 files at a time. Each PDF can be any size that your browser can handle.
No. The merge operation copies pages from each source PDF into the output file without re-encoding or recompressing the content. Text, images, vector graphics, and bookmarks are preserved exactly as they appear in the originals.
No. All processing happens locally in your browser using JavaScript and the pdf-lib library. Your files are never sent to any server. Once you close the page, no trace of your documents remains.
Why Use This PDF Merge Tool
Contract Assembly
Combine signed pages, addenda, and exhibits into a single consolidated contract document.
Research Compilation
Merge multiple research papers or references into a single reading document.
Report Consolidation
Combine monthly reports, invoices, or department summaries into one comprehensive PDF.
Academic Submission
Stitch together chapters, appendices, and references into a single thesis or dissertation file.