PDF Tool
Merge PDFs
Combine multiple PDF files into a single document. Runs entirely in your browser — nothing is uploaded.
100% in-browserNo uploadsFree
How to merge PDFs
Merging PDFs is simple with our free tool. Just drag and drop your PDF files into the box above, or click to select them from your device. You can reorder files using the up/down buttons before merging.
- Select multiple PDF files by dragging them or using the file picker
- Reorder files using the arrow buttons (optional)
- Click Merge & Download to combine them
- Your merged PDF will download automatically
Features
- ●100% in-browser, no uploads
- ●Completely free, no sign-up
- ●Supports up to 50 PDFs
- ●Reorder files before merging
- ●Preserves all original content
- ●Secure and private
- ●Works with any PDF
- ●No file size limits (browser only)
How it works (technical)
The PDF merger uses the pdf-lib library to process files entirely in your browser. When you merge:
1. Each PDF is loaded locally using
FileReader2. Pages are extracted and copied to a new document
3. The merged document is saved and downloaded
• No data ever leaves your device