Merge PDFs
Combine several PDFs into a single document, in the order you choose.
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Drop your PDFs here or click
🔒 100% local processing — your files are never sent to a server.
How it works
- Add two or more PDFs
- Check the file order
- Download the merged PDF
Merge PDFs without uploading your files
Drop several PDFs, reorder them if needed, and ConvertLab assembles them into one file — entirely in your browser with pdf-lib. Your documents never leave your device, ideal for combining contracts, invoices or confidential chapters.
FAQ
Are my files sent to a server?
No. Merging happens 100% in your browser. No PDF is transmitted to our servers.
How many PDFs can I merge?
As many as your device memory allows. In practice, dozens of documents work fine.
Is page order preserved?
Yes, files are assembled in the order you add them.