Free PDF Merger: Combine PDFs Online
Merge multiple PDF files into one, right in your browser. Drag to reorder files, select specific page ranges from each PDF, and download the merged result instantly. Your files are never uploaded to any server. All processing happens locally on your device.
🔒 Your files stay in your browser
For this file tool, processing happens on your device — we don't receive, store, or transmit your file contents.
Drop PDF files here or click to upload
All processing happens locally in your browser
How to Merge PDF Files
- 1
Upload your PDFs
Drag and drop up to 20 PDF files onto the upload area, or click to browse. Each file appears as a card in the merge list.
- 2
Reorder files
Drag the grip handle (⋮⋮) on any card to arrange files in your desired merge order. The output PDF follows the order shown.
- 3
Select page ranges
Optionally limit the pages from each file by setting From and To page numbers. Leave the defaults to include all pages.
- 4
Merge and download
Click Merge & Download PDF, the file is created and saved instantly in your browser. No files are uploaded at any point.
Features
Browser-Based
PDFs are merged in your browser using pdf-lib. Files are never uploaded, transmitted, or seen by any server. Technically enforced by the architecture.
Drag-to-Reorder
Drag files into any order, on desktop with mouse, on mobile with touch. The merged output follows your exact arrangement.
Page Range Selection
Include only specific pages from each PDF by setting From and To page numbers. Perfect for extracting chapters or skipping unwanted pages.
Up to 20 Files
Merge up to 20 PDF files in one operation, including PDFs of different page sizes and orientations.
Instant Download
The merged PDF is generated and downloaded directly in your browser. No waiting for a server response.
Works Offline
Once the page loads, the merger works fully offline. No internet connection required during the merge operation.
How Your Privacy Is Protected
The PDF Mergeris built with a privacy-first architecture. Here's how file contents stay on your device — not as a policy, but by how the tool is built.
No file uploads
Your files are processed using browser APIs (Web Workers, Canvas, File API). For this tool, file contents stay on your device.
Local processing only
All computation happens in your browser using your device's CPU. Our servers don't process your file contents.
Works offline
Once the page loads, you can disconnect from the internet and the tool will still work perfectly.
We don't see your files
For this file-processing tool, there's no upload endpoint — files are read and processed entirely by your browser.
Use Cases
Combining Reports & Documents
Merge monthly reports, document chapters, or sections from different authors into a single presentable PDF.
Contract & Legal Documents
Combine signed agreements, addenda, and annexures into one PDF for submission, archiving, or sending to clients.
Study & Academic Notes
Merge lecture notes, handouts, and reference PDFs into a single study guide for each course or subject.
Invoice & Receipt Bundling
Combine multiple invoices or receipts into one PDF for expense reporting, reimbursements, or tax filing.
Portfolio Compilation
Merge portfolio pieces, certificates, and a cover letter into a single professional PDF to share with employers.