Combine PDFs Into One Document — Free Tool
Combine multiple PDFs into one single document online for free. Reorder, merge, and download instantly. No server upload.
Combine multiple PDFs into one organized document. Ideal for assembling reports from separate sections, consolidating invoices, or packaging application materials into a single file for submission.
Drop PDFs to merge
PDF files only
🔒100% Private — Your files never leave your device. All processing runs locally in your browser.
How It Works
Drag and drop multiple PDF files, reorder them visually, and merge them into a single document — all processed locally in your browser using the pdf-lib library. Your PDFs never touch a server.
The tool reads each PDF's internal structure, preserves all pages, bookmarks, and formatting, then combines them into one continuous document. You can rearrange the order by dragging files before merging.
Features
- ✓Combine unlimited PDF files into one document
- ✓Drag-and-drop reordering before merging
- ✓Preserves original formatting, fonts, and embedded images
- ✓No file size limits — handles large documents with ease
- ✓Instant download of the merged PDF
- ✓Works entirely offline after page load
Frequently Asked Questions
There is no limit — you can combine as many PDF files as you need into a single document.