How many PDFs can I merge at once?

You can merge up to 10 PDF files in a single operation. The total combined size must be under 25MB (free) or 50MB (Pro).

Will merging change the quality of my PDFs?

No. The merge is lossless — all pages, images, fonts, and formatting are preserved exactly as they are in the originals.

Yes. After uploading, drag and drop the files into the order you want them to appear in the final document.

There is no per-page limit. As long as the total file size is within the limit, you can merge documents of any length.

Combine multiple PDF files into a single document. Drag and drop to reorder pages.

Drag & drop files here

or click to browse · PDF · max 25MB · up to 10 files

How many PDFs can I merge at once?: You can merge up to 10 PDF files in a single operation. The total combined size must be under 25MB (free) or 50MB (Pro).
Will merging change the quality of my PDFs?: No. The merge is lossless — all pages, images, fonts, and formatting are preserved exactly as they are in the originals.
Can I reorder the PDFs before merging?: Yes. After uploading, drag and drop the files into the order you want them to appear in the final document.
Is there a page limit?: There is no per-page limit. As long as the total file size is within the limit, you can merge documents of any length.

After using Merge PDF, take it further — let ZenDoc AI edit, improve, or generate entirely new documents from your content.