Merge PDF

1. Select two or more PDFs, or drop them onto the box. You can add more later.
2. Use the arrows to put the files in the order you want. Remove any you do not need.
3. Press Merge and download PDF. Your original files are not changed.

• Each file is checked in your browser; files that are not PDFs, are encrypted, or are signed are skipped with a reason.
• The pages are copied in order into one new PDF with the pdf-lib library, sharing fonts and other resources where possible so the file does not grow unnecessarily.
• The merged file carries no title, author, or other document properties.

• Standard PDF files
• Up to 20 files
• Max 25 MB each, 60 MB in total
• Max 300 pages in total

• Password-protected and digitally signed PDFs are skipped: merging would invalidate signatures.
• Bookmarks, links between documents, and some interactive form features may not carry over. Check important documents.
• Limits protect your browser: 20 files, 60 MB, and 300 pages in total.
• Pages keep their own sizes; mixed sizes are not resized to match.

This tool runs in local-only mode. Your text or files are processed in your browser and are not uploaded to our servers for this feature. Keep originals on your device; downloads create a separate copy.

Are my PDFs uploaded to combine them?

No. Merging happens in your browser. Nothing is sent to our servers.

Why was one of my files skipped?

The message under the list says why: it may be encrypted, signed, damaged, or over a limit. Fix or replace that file and add it again.

Can I change the order after adding files?

Yes. Use the up and down arrows next to each file. The numbers show the final order.