YL
YoussefLabs

Merge PDF

PDF Utilities

Combine multiple PDF files into one document. Reorder the files, then merge and download, all in your browser.

Local browser processing0 network transfers
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Key Capabilities

Files Stay on Your Device

PDFs are read and merged by your browser. Your documents are never uploaded.

Choose the Order

Add several files at once, then move them up or down before merging.

Pages Kept As They Are

Pages are copied into the new file without being re-rendered, so text and vector graphics stay sharp.

Clear Handling of Problem Files

Encrypted, damaged, or non-PDF files are reported by name instead of breaking the merge.

100% Client-Side Processing

When you use Merge PDF, your data never leaves your browser. All transformations execute in-memory on your local machine with zero server uploads. Web assets are downloaded to run the tool, but your input data is never transmitted.

Frequently Asked Questions

Are my PDFs uploaded anywhere?

No. Your browser reads and merges the files on your device. Nothing is sent to YoussefLabs servers. The page does download the code needed to run the tool.

Can I merge password-protected PDFs?

Not currently. Encrypted or password-protected PDFs are rejected with a message. Remove the protection first, then add the file again.

What is kept from the original files?

Every page is copied in its original order and size. Bookmarks, form fields and named destinations are not carried into the merged file.

What are the limits?

Up to 100 files, 100 MB each and 250 MB in total, and up to 5,000 pages per merge. The limits protect your browser from running out of memory.