Merge PDF Files Online — Free PDF Merger
Merge PDF files online for free. No upload, no signup — combine documents instantly in your browser. Unlimited use.
Merging PDFs online usually means uploading sensitive documents to someone else's server. Not here. This merger runs entirely in your browser — your files never leave your device, and there are no daily limits or file size restrictions.
Drop PDFs to merge
PDF files only
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