Interleave PDFs

Weave two PDFs together page by page — ideal for merging front and back scans.

First PDF (odd pages)

Select the first pdf (odd pages)

Click to choose, or drop a file here

Second PDF (even pages)

Select the second pdf (even pages)

Click to choose, or drop a file here

Second PDF was scanned back-to-front (use its pages in reverse)

Related PDF tools

Merge PDFCombine PDFs — plus images, Word, Excel and PowerPoint — in the order you want.Split PDFBreak a PDF into separate files by page range, or into equal chunks.Remove pagesDelete specific pages from a PDF.Extract pagesPull selected pages into a new PDF.

Interleave PDFs — frequently asked questions

What's the classic use?+

You scanned the fronts of a stack, flipped it, scanned the backs — this merges them back into reading order.

What if the files are different lengths?+

Leftover pages from the longer file are appended at the end.

Do you upload my files to a server?+

No — every tool here processes your files entirely on your device, and nothing is uploaded to a server. The AI tools that used to send extracted text to a server are currently disabled.

Is there a file size limit?+

There's no artificial limit we impose, but since processing happens in your browser, very large files (500+ MB or 1,000+ pages) are limited by your device's memory rather than by us.