Merge PDF Files Online Free
Combining multiple PDF files into a single document is one of the most common document tasks for professionals, students, and developers alike. Whether you are assembling a report from separate chapters, combining scanned invoices for expense submission, or packaging multiple attachments into a single file for a client, this tool merges any number of PDFs in the correct order in one step. All processing runs locally in your browser using PDF.js — your files are never uploaded to any server, making it safe for confidential documents, contracts, and financial records. Drag and reorder the input files before merging to control the page sequence in the final document. The merged PDF is downloaded directly to your device.
FAQ
- How many PDF files can I merge at once?
- You can merge as many files as your browser can handle in memory. For very large PDFs, merging them in smaller batches is recommended.
- Will the merged PDF preserve bookmarks and links?
- Internal links within each original PDF are preserved. Cross-document bookmarks and outline entries may not be merged automatically.
- Are my PDF files uploaded to a server?
- No. All merging is done entirely in your browser. Your files are never sent anywhere.