Drag and drop multiple PDFs, reorder them, and merge into one downloadable file. 100% client-side.
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The PDF Merger lets you combine multiple PDF documents into a single file without uploading anything to a server. Drag, drop, reorder your files, and download the merged result in seconds — all processing happens locally using pdf-lib.
There is no hard limit enforced by the tool, but very large PDFs (100+ MB each) may be slow to process as everything runs in your browser's memory.
Yes. Your files never leave your device. All merging happens using JavaScript in your browser — no server upload, no cloud storage.
You can reorder the files by dragging the rows, which controls the order of entire documents in the merged output.
Only standard PDF files (.pdf) are supported. Password-protected PDFs that cannot be opened without a password may fail.