Merge PDF Files

Combine multiple PDF files into one document. Drag to reorder.

🔒 Your files never leave your device — everything runs in your browser.

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Click to select PDFs or drag and drop them here

Frequently Asked Questions

Are my files safe? ▼

Yes. This tool runs entirely in your browser using JavaScript. Your PDF files are never uploaded to any server. The merging happens on your device using the pdf-lib library.

Is there a file size limit? ▼

There's no hard limit, but very large files (100MB+) may be slow depending on your device's memory. For best performance, keep total file size under 100MB.

Can I change the page order? ▼

You can drag and drop the files to change their order before merging. The pages from each file will appear in the merged PDF in the order shown.