Merge PDF
Combine several PDF files into one, in your browser.
100% private: your PDF is processed entirely inside your browser and is never uploaded to any server.
About the Merge PDF
Merge PDF combines two or more PDF documents into a single file, in the exact order you add them. It is the tool you reach for when you need to bundle an invoice with its receipt, staple a cover letter to a CV, or assemble scanned pages into one document. Unlike most online mergers, everything happens inside your browser using the pdf-lib library, so your files are never uploaded to a server — which matters when the documents are contracts, IDs or anything confidential.
How to use it
- Click and select two or more PDF files (hold Ctrl or Shift to pick several at once).
- Check the order — files are merged in the order they appear.
- Click 'Merge PDFs' and your combined merged.pdf downloads automatically.
Frequently asked questions
Are my files uploaded anywhere?
No. The merge happens entirely in your browser using JavaScript. Your PDFs never leave your device, so it is safe for confidential documents.
Is there a file size or page limit?
There is no fixed limit, but very large files are processed in your device's memory, so extremely large PDFs may be slow on low-powered devices.
Can I merge password-protected PDFs?
The tool tries to ignore basic encryption, but PDFs locked with an open password must be unlocked first before they can be merged.
In what order are the pages combined?
Files are merged top to bottom in the order they are listed after you select them, keeping every page of each document.
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