PDF tool

Merge PDF Files

Combine multiple PDF documents into a single file. Drag and drop up to 20 files.

PrivConvert
Privacy-first conversion
No files stored
In-memory processing
Deleted instantly
No sign-up needed

Complete the security check to begin

Combine PDFs in seconds

Need to combine multiple PDF documents? Drop them here and we'll merge them into a single file, preserving the original formatting, links, and bookmarks.

  • Up to 20 files - merge multiple documents at once
  • Preserves formatting - fonts, images, and links stay intact
  • Order control - files are merged in the order you select them

Why choose PrivConvert?

PrivConvert processes your document entirely in memory and forgets it the moment you have your result. Here is what that means in practice:

Fast in-memory processing

Each job runs in an isolated in-memory sandbox, so most conversions finish in seconds instead of waiting in a queue.

Nothing is stored

We never keep a copy. Once your converted file is delivered, both the original and the result are gone — there is nothing left to leak or misuse.

Isolated sandbox

Every conversion runs in its own locked-down process with no network access, so files can never leak or interfere with one another.

No human ever sees it

Your files are handled entirely by automated code. No staff, partner or AI model ever reads, stores or trains on your data.

Built for people who value their privacy

PrivConvert handles thousands of conversions every day for developers, designers and privacy-conscious people who need a document converted without handing over a permanent copy.

250 MB Max file size
450+ Conversion tools
0 sec File retention
100% Free to use

Frequently Asked Questions

Can I control the page order?
Yes, files are merged in the order you select them. Rearrange your files before uploading to set the order.
How many PDFs can I merge at once?
You can merge up to 20 PDF files in a single operation.
Are bookmarks and links preserved?
Yes, internal links and bookmarks from the original documents are preserved in the merged output.
Is this tool really free?
Yes, completely free with no hidden fees, no watermarks, and no sign-up required. You can convert as many files as you need.
Are my files private and secure?
Absolutely. Every conversion runs in an isolated, in-memory process. Your files never touch the disk, are never stored or shared, and are deleted from memory the moment your download is ready.

Further Reading