How to merge PDF files?

1) Upload multiple PDFs; 2) Arrange order; 3) Click Merge; 4) Download combined PDF. All processing is local using pdf-lib.

Yes. All files are processed locally in your browser using pdf-lib. Nothing is uploaded to any server. Works offline too.

Yes. Use the up/down buttons to reorder files before merging. You can also remove unwanted files.

Will quality decrease after merging?

No. pdf-lib copies original PDF objects directly without re-encoding. Text, images, links, and forms are preserved.

Upload multiple PDFs → arrange order → click Merge → download. All processing is local using pdf-lib.

Yes. All files processed locally in your browser. Nothing is uploaded. Works offline.

Yes. Use up/down buttons to arrange files before merging. Remove unwanted files too.

Up to 50MB per file, 200MB total recommended. Larger files may be slow due to browser memory.

No. pdf-lib copies original PDF objects without re-encoding. All content is preserved.