Merge PDF Without Uploading — Free & Private
Merging PDFs traditionally requires uploading your files to a third-party server, which introduces privacy risks. This tool combines PDF files using pdf-lib, a JavaScript library that runs entirely inside your browser. Your files are never transmitted over a network.
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All PDF merging happens using pdf-lib in your browser — no file is ever uploaded to any server.
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Merge PDFs →
Free · No upload · No account required
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Frequently Asked Questions
- Do I need to upload my PDF files?
- No. The merger runs entirely in your browser using the pdf-lib JavaScript library. Your files are read from your device's memory and processed locally — nothing is transmitted.
- Is there a file size limit?
- There is no server-side size limit because no server is involved. The practical limit is your browser's available memory, which is typically several gigabytes on modern devices.
- How many PDFs can I merge at once?
- You can add as many PDF files as you like. The tool processes them in the order you arrange them.
- Is the tool free to use?
- Yes. There is no cost, no account required, and no usage limits.