PDF Merger
Combine multiple PDF files into one, with drag-to-reorder.
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About this tool
PDF Merger joins several PDF files into a single document — handy for combining chapters, attaching a cover page, or bundling invoices. Add your files, arrange them in the order you want with the up/down controls, and merge.
Merging is done locally with pdf-lib: pages are copied into a new document without re-rendering, so quality is preserved exactly. Your documents never leave your device.
How to use
- Upload two or more PDF files.
- Use the up/down arrows to arrange them in merge order.
- Remove any file you added by mistake.
- Click merge and download the combined PDF.
Frequently asked questions
No fixed limit, but each file must be under 25 MB and very large merges need enough browser memory. A handful of typical documents works smoothly.
No. Pages are copied structurally, not re-rendered, so text and images stay exactly as they were.
Encrypted PDFs cannot be opened by this tool — remove the password first with a desktop PDF reader, then merge.
No. Merging happens 100% in your browser.