Interleave PDFs
Alternate pages from two PDFs, including reversed scans.
The list above shows the first and second file.
Reverse order helps when the backs were scanned from the last sheet first.
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How we handle your data →How to use this tool
- Add fronts and backs as two separate PDF files.
- Choose which starts and reverse the second if its sheets run backward.
- Check the first pairs and any remaining sheets at the end.
An example you can verify
Restore the order of a double-sided scan saved as two separate files.
Example input
sample-3-pages.pdf (A1, A2, A3) + sample-2-pages.pdf (B1, B2).
Expected result
A1, B1, A2, B2, A3.
Try these files containing fictitious data:
Download sample · sample-3-pages.pdfDownload sample · sample-2-pages.pdfReverse the second file if backs were scanned from the last sheet. Remaining pages are appended at the end; check whether any backs are missing.
Settings and limits
Add exactly two PDFs. Choose which starts and the second file’s page order.
Exactly 2 PDFs, up to 120 MB per batch and 500 output pages. Encrypted PDFs are unsupported. Check links, forms, annotations and signatures after editing a document. Available memory may require smaller batches.
Frequently asked questions
What if one file has more pages?
Remaining sheets are appended once the other file ends. Blank sheets are not inserted to complete pairs.
Are my files uploaded?
No. Your file and result are processed locally in your browser. No account is needed.
Guides
Combine documents, supporting evidence and appendices into an ordered copy, then check it before sharing.
Rebuild double-sided scans by alternating files and correct back-side pages saved in reverse order.
Create alternating groups, count from the first sheet and run a test before manual double-sided printing.