Is there a limit on how many PDFs I can merge?

There is no hard limit. In practice, very large batches (50+ PDFs) may be slow because processing happens in your browser. For best performance, merge in smaller groups.

Will the quality of my PDFs be reduced?

No. The merger combines PDFs without re-compression or quality loss. The output quality matches the original PDFs.

Can I merge password-protected PDFs?

No. Password-protected PDFs cannot be merged. You must remove the password protection first using a PDF unlock tool.

Does this tool upload my PDFs?

No. All processing happens in your browser using the pdf-lib library. Your PDFs are never sent to any server.

Can I merge PDFs of different page sizes?

Yes. PDFs with different page sizes can be merged. Each page retains its original size in the combined document.

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PDF Merger Online Free

Combine multiple PDF files into a single document. Reorder pages by dragging, then merge them into one PDF. All processing runs in your browser with no file upload required.