Free online PDF merger. Combine multiple PDF files into one. Drag to reorder. Pure client-side processing, no file upload. Batch merge with original formatting preserved.
Click to upload PDF files or drag & drop
Multiple PDFs supported, drag to reorder
Merging PDF files...
1. Upload PDFs: Click or drag & drop multiple PDF files. Batch selection supported.
2. Reorder files: Drag file cards to adjust merge order. Top files come first.
3. Merge & download: Click 'Merge PDFs', wait for processing, then download.
1) Upload multiple PDFs (click or drag & drop); 2) Drag to reorder files; 3) Click 'Merge PDFs', download the combined file. All processing is done locally in your browser — files never leave your device.
No! This tool uses the pdf-lib library and preserves original formatting, fonts, images, and page sizes. All pages from each PDF are merged in order.
Individual files up to 50MB recommended. Total pages under 500 for best performance. If you encounter memory issues, try merging in batches.
Extremely secure! All processing is local — your PDFs never leave your device. We cannot see or access any of your file contents.