Merge PDF
Combine PDFs in any order. Files are processed locally - nothing is uploaded.
About this tool
Combine two or more PDF files into a single document - keep page order, preserve quality, and never upload anything. The merge happens entirely in your browser using pdf-lib, so even confidential contracts, scans, and invoices stay on your device.
Useful when you need to send a single packet to a client, bundle scanned receipts for an expense report, or stitch together multiple chapters into one book.
Features
- Merge any number of PDFs into one file
- Drag to reorder pages before merging
- Original quality and bookmarks preserved
- No file size limit beyond your device's memory
- Works offline once the page is loaded
How to use it
- Drop or pick the PDF files you want to combine.
- Reorder them with the up/down arrows so the pages end up in the right sequence.
- Click "Merge PDF" - the combined file downloads automatically as merged.pdf.
Everything happens inside your browser using JavaScript and WebAssembly. Your files are never uploaded to a server, never stored, and never seen by us.
Frequently asked questions
No artificial limit. The only limit is the RAM available to your browser tab - modern laptops handle hundreds of pages easily.
No. The merge runs locally in JavaScript. Your files never leave the browser tab.
No. We copy the original pages byte-for-byte; fonts, images and vector graphics are preserved.