Alternate & Mix
Interleave pages from two or more PDFs.
or drop them here · paste works too
Processed on this device. Nothing is uploaded.
How to use Alternate & Mix
- 1Choose PDFs to interleave, or drop them on the page.
- 2Adjust the options if you need to.
- 3Press “Mix pages”, then download the result.
About this tool
Takes page 1 from each file, then page 2, and so on. Perfect for double-sided scans where fronts and backs were scanned separately (tick “reverse” if the backs came out last-page-first).
Your files stay on this device. SpitePDF opens and processes them inside your browser. The counter in the top bar shows how many bytes this page has sent to any server: it should read 0 B. How this works
Related tools
- Merge PDFCombine PDFs into one file, in the order you choose.
- Split PDFCut a PDF by page ranges, every N pages, or one file per page.
- Remove PagesDelete pages you don't need.
- Extract PagesPull selected pages into a new PDF.
- Organize PagesDrag to reorder, rotate, delete, duplicate, insert blanks.
- Rotate PDFTurn all pages or just the ones you pick.
- Split by TextStart a new file wherever a word or phrase appears.
- Split by BookmarksOne file per chapter, named after the bookmark.
Questions
Is SpitePDF really free?
Yes. Every tool is free with no page limits, no sign-up and no watermark.
Are my files uploaded?
No. Files are opened and processed by your own browser. They never reach a server. The only things that use the network are optional: AI answers (if this site enables them) send the question plus relevant passages of text, never the file; P2P Share and the whiteboard connect two browsers directly.
Does it work offline?
Once a tool's engine has loaded, most tools keep working without a connection. OCR downloads its language data on first use and caches it.
Is there a file size limit?
No limit is imposed. Very large files are limited only by your device's memory; on phones, split or compress huge files first.