Merge PDF Files

Combine 2 or more PDF files into a single document directly in your browser. Reorder pages and files with ease.

100% Client-Side No Uploads Multi-File Support

Drop PDF files here

or click to browse (select multiple files)

Total files: 0 Total pages: 0 Total size: 0 Bytes

Output filename

How to Merge PDF Files

Select PDF Files

Drop 2 or more PDF documents into the upload area.

Arrange Order

Drag files into order or use the Move Up and Move Down buttons.

Merge & Download

Click 'Merge PDFs' to join the documents into one file and download the result.

Frequently Asked Questions

Are my PDF documents uploaded to a server?

No. PDF document processing and merging uses `pdf-lib.js` directly in your web browser. No document data is sent over the network.

Is there a file size limit for merging PDFs?

Because processing relies on your device's RAM and CPU, you can merge documents of any size as long as your browser memory permits.

Will my PDF page quality or vector formatting be degraded?

No. PDF page contents, vector fonts, and layout structures are copied page-by-page into the new container document without rasterizing or losing clarity.