PDF tools

PDF Merge

Combine multiple PDF files into a single document. Reorder files before merging. Everything runs in your browser — no uploads.

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Drop PDF files here or click to browse

Select multiple files

How to Use

Select or drop the PDF files you want to merge.
Use the ↑ ↓ arrows to reorder them.
Click Merge & Download, or Merge, compress & download to shrink the result in the same step — it runs the same engine as the PDF Compressor, so you do not have to merge, save, and then pass the file through a second tool.

Are my PDFs uploaded anywhere?

No. Merging uses the pdf-lib library which runs entirely in your browser. Your files never leave your device.

Is there a file size limit?

Limited only by your browser's available memory. Very large PDFs (100MB+) may be slow.

Are password-protected PDFs supported?

No — encrypted PDFs will fail to merge. Remove the password first.