PDF Merge – Free Online PDF Merger

Merge multiple PDF files into one. Drag to reorder, set page ranges per file. Progress indicator. localStorage auto-save.

Features

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Upload multiple PDF files at once via drag & drop or click.

↕️

Drag files to change their order in the final merged PDF.

📑

Set custom page ranges per file (e.g., 1-3, 5, 7-9).

📊

Shows merge progress for large files.

💾

File list saved to localStorage for session continuity.

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pdf-lib processes PDFs entirely in browser. No uploads.

Drag & drop multiple PDF files onto the tool.

Drag files up or down to set merge order.

Click a file to set specific page ranges if needed.

Click Merge. Download the combined PDF.

How does page range work?

Enter ranges like 1-3 (pages 1 to 3), 5 (single page), or 1-3,5,7-9 (multiple ranges). Pages not in range are excluded.

What happens if page ranges overlap?

Overlapping ranges are allowed — the same page can appear multiple times in the merged output.

Is my data sent to a server?

No. pdf-lib processes PDFs entirely in the browser using Web Assembly. Your PDFs never leave your device.