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Merge PDF Files Online

Combine multiple PDF files into a single document. Drag and drop to reorder pages. Fast, free, and secure - all processing happens in your browser.

Upload PDF Files

Drag & drop an image here, or click to select

Max file size: 100MB

How to Use

  1. Click the upload area or drag and drop PDF files to add them.
  2. Add at least 2 PDF files for merging.
  3. Drag and drop files in the list to rearrange their order.
  4. Click the 'Merge All' button to combine the files.
  5. Download the merged PDF file once processing is complete.
  6. All files are processed locally in your browser — nothing is uploaded to any server.

About PDF Merging

What is PDF Merging?

PDF merging is the process of combining two or more separate PDF documents into a single file. This is useful for organizing related documents, creating compilations, or combining scanned pages into one cohesive document. The merged PDF preserves all original formatting, images, and text from each source file.

Client-Side Processing

This tool processes all PDF files entirely in your browser using JavaScript. No files are uploaded to any server, ensuring complete privacy and security of your documents. The pdf-lib library handles all PDF manipulation operations locally, making it fast and reliable without internet dependency.

Preserving Document Quality

When merging PDFs, the original quality of each document is preserved. Text remains searchable, images maintain their resolution, and all formatting stays intact. Unlike some tools that re-render PDFs, this merger copies pages directly, ensuring zero quality loss in the merged output.

File Order and Organization

The order in which files appear in the merged document matters. This tool allows you to drag and drop files to rearrange them before merging. The final PDF will contain pages in the exact order you specified, making it easy to create well-organized compilations.

Key Features

  • •Merge unlimited PDF files into one document
  • •Drag-and-drop file reordering before merge
  • •100% client-side processing — no file uploads
  • •Preserves original formatting and quality
  • •Fast processing with instant download
  • •Works with any standard PDF file

Common Use Cases

  • •Combining multiple scanned documents into one file
  • •Merging report sections into a complete document
  • •Creating PDF compilations from separate chapters
  • •Consolidating invoices or receipts into one file
  • •Assembling presentation materials from multiple sources