Merge PDF Files Online – Free & Private
Select and upload two or more PDF documents to instantly combine them into a single cohesive file. Drag and drop to reorder the pages before clicking merge. Everything executes entirely in your browser — guaranteeing your files never leave your local device.
Merge PDF is ready in your browser
100% Free & Private — Processing runs locally on your device without server uploads.
About Merge PDF
Select and upload two or more PDF documents to instantly combine them into a single cohesive file. Drag and drop to reorder the pages before clicking merge. Everything executes entirely in your browser — guaranteeing your files never leave your local device.
Frequently Asked Questions
How many PDFs can I merge at once?
You can merge an unlimited number of PDFs at once. There is no hard limit imposed by our software — you are only limited by your device's available browser memory. For extremely large batches (100+ files), we recommend merging them in smaller batches.
Is the original file order preserved?
Yes, the order is strictly preserved. The pages will appear in the exact order you arrange the file thumbnails on your screen. You can use the drag-and-drop interface or the up/down arrows to reorder them before clicking the merge button.
Are my files uploaded to a server?
Absolutely not. All PDF merging happens locally inside your web browser using a client-side library (PDF-lib). Your files are never uploaded, stored, or transmitted to any remote server, ensuring 100% data privacy.
Is this tool completely free to use?
Yes, this tool is 100% free forever. There are no paywalls, no file-size limits, no hidden subscriptions, and no watermarks added to your final merged document.