Batch PDF Merger

Pure Local Processing No Server Upload Multiple Files PDF Engine

100% Free & Private batch PDF merger. No file upload required — combine multiple PDF files into a single document locally in your browser. Drag and drop to reorder pages easily, supports unlimited PDF files (up to 50MB per file), with instant one-click merge.

Tips & Tricks

Order Matters

Use the up and down arrows to arrange your PDFs in the correct order before merging. The final document will follow this sequence.

Combine Related Documents

Merge multiple chapters, reports, or invoices into a single PDF for easier sharing and archiving.

Privacy First

All processing happens locally in your browser. Your PDF files are never uploaded to any server, keeping sensitive documents secure.

Common Use Cases

Combine Reports

Merge monthly reports into a single document

Bundle Invoices

Combine multiple invoices into one PDF for clients

Assemble Contracts

Merge contract sections from different sources

Create Portfolios

Combine work samples into a portfolio PDF

Unify Presentations

Merge PowerPoint-exported PDFs into one presentation

Consolidate Scans

Merge scanned document PDFs into a single file

FAQ

Is my PDF data safe?

Yes. All processing is done entirely in your browser using JavaScript. Your PDF files never leave your device — no data is uploaded to any server.

What is the maximum number of PDFs I can merge?

There is no hard limit, but we recommend merging up to 20 files at a time for optimal performance. Each file must be under 50MB.

What happens to bookmarks and annotations?

The merger combines page content from each PDF. Some interactive elements like bookmarks, form fields, and annotations may not be preserved in the merged output.

Can I reorder files after uploading?

Yes. Use the up and down arrow buttons next to each file to change the merge order. The final PDF will reflect the order shown in the list.

Does it work offline?

Once the page has been loaded, the PDF processing libraries are cached by your browser. You can merge PDFs offline as long as the necessary scripts are cached.