How does alternate merge work?

Pages are interleaved by round: first all “page 1”s in your file order, then all “page 2”s, etc. Example: A.pdf (3 pages) + B.pdf (2 pages) → A1, B1, A2, B2, A3.

pdf-lib rebuilds the document from copied pages; outlines/bookmarks from the originals are not merged. For bookmark-heavy files, use Merge PDF if you only need one file after another.

Is this free and private?

Yes. No upload—everything runs in your browser.

How many files can I mix?

Up to 30 PDFs per run in this tool. Very large files may take longer depending on your device.

Alternate & Mix Pages Fast Free

Use SagePDF to alternate & mix pages fast free. Merge PDFs by alternating pages from each PDF. Preserves Bookmarks. Use SagePDF in your browser—no uploads, no signup, your files stay on your device.

Upload two or more PDFs, order them with drag-and-drop, then mix: page 1 from each file, then page 2 from each, and so on. Everything runs in your browser.

Drop your PDFs here, or click to choose files

Your files never leave your device. All processing happens in your browser.

How to use

Upload PDFs

Select at least two PDF files. You can add more in multiple batches until you reach the file limit.

Set file order

Drag files into the order you want. Mixing always takes page 1 from each PDF in order, then page 2 from each, and so on. Shorter PDFs are simply skipped once they run out of pages.

Mix & download

Click Mix pages to build the new PDF, then download. Processing stays on your device.

Frequently asked questions

Merge PDF
Combine whole files, or select specific pages to merge into a new document.
Organize PDF
Reorder, duplicate and organize PDF pages.
Split PDF
Extract by range, even/odd, every page, visual selection, bookmarks, or every N pages—all in your browser.