PDF Split & Merge - Free Online PDF Tool

Process PDF files entirely locally to divide documents into single pages or custom ranges, or combine multiple files into one. Powered by pdf-lib, it handles extraction and merging without uploading data to servers. Ideal for quickly reorganizing reports, splitting invoices, or combining chapters into a single document.

How to Use

1. Select Split or Merge mode from the dropdown menu at the top of the interface.
2. Upload your PDF file(s) using the dedicated input field or drag-and-drop zone.
3. Configure split ranges or verify the list of files to merge before proceeding.
4. Click the Process button to perform the action in your browser.
5. Download the resulting PDF files from the automatic browser download dialog.

Key Features

• Split individual pages
• Custom range extraction
• Merge multiple PDFs
• Local processing
• Drag and drop
• Reorder support

Frequently Asked Questions

Are my PDF files uploaded to a server?

No. All processing happens directly in your browser using pdf-lib. Your files remain on your device and are never sent to any external server, ensuring complete privacy and data security.

Can I extract specific pages instead of the whole document?

Yes. In Split mode, select 'Custom page ranges' and enter specific numbers or ranges (e.g., 1-3, 5, 7-10). The tool will extract only those pages into separate PDF files.

Does this tool support merging multiple PDF files?

Absolutely. Choose the Merge mode and upload multiple PDF files. The tool will combine them into a single document while preserving the order of the uploaded files.

Is there a file size limit for processing?

Since the tool runs locally, limits depend on your device's available memory. It supports standard browser file handling, so most typical PDF sizes work without issues.

Launch PDF Split & Merge

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Maintained by Huang Bin · Last updated October 3, 2026