What is this useful for?

It is ideal for combining separately scanned odd/even sides, front/back batches or two synchronized document streams.

What happens when page counts differ?

Choose to append pages remaining in the longer source or stop after all complete pairs.

Are pages rasterized?

No. Original PDF pages are copied with their dimensions and visible vector content.

Are bookmarks and forms merged?

No. This workflow creates a new page sequence; document-level outlines, attachments, forms and signatures are not combined.

PDF Tools

Alternate & Mix PDF Pages

Interleave pages from two PDFs with source order, reversal and unequal-length controls.

Free browser toolRuns in your browserNo sign-up

Professional duplex document studio

Alternate and mix pages from two PDFs

Interleave front/back scans, odd/even exports or two document streams while preserving vector page content and original dimensions.

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PDF A pages

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PDF B pages

output pages

Choose PDF AProtected PDFs prompt for the known password locally.Choose PDF BProtected PDFs prompt for the known password locally.

Mix controls

First page source Append remaining pages from the longer PDF Reverse PDF A before mixing Reverse PDF B before mixing

Private workspace. Files stay in this browser tab and are never uploaded to ToolsOnDuty.

Nothing downloads automatically. Unequal-length behavior follows your selected option.

About the Alternate & Mix PDF Pages

Alternate & Mix PDF Pages interleaves pages from two documents into a planned sequence such as A1, B1, A2, B2. Choose which PDF starts and independently reverse either source.

When page counts differ, append remaining pages from the longer PDF or stop at complete pairs. The full source/page sequence is visible before processing.

Pages are copied as PDF pages rather than screenshots, preserving visible vectors, text and original dimensions. Document-level bookmarks, attachments, forms and digital signatures are not merged.

Key features

Two protected-PDF inputs
A-first or B-first ordering
Independent source reversal
Append or drop unmatched pages
Full visual sequence plan
Mixed page-size preservation
QPDF structure and exact page-count verification
Explicit download

How to use

1Choose PDF A and PDF B.
2Choose which source contributes the first page.
3Reverse either source when processing back-to-front scans.
4Choose whether unmatched pages are appended.
5Review the sequence, mix pages and download the verified result.

Examples

Combine duplex scans

Input: Odd pages in PDF A and reverse-ordered even pages in PDF B

Output: A1, reversed B1, A2, reversed B2 sequence

Review the sequence chips before building.

Frequently asked questions

What is this useful for?: It is ideal for combining separately scanned odd/even sides, front/back batches or two synchronized document streams.
What happens when page counts differ?: Choose to append pages remaining in the longer source or stop after all complete pairs.
Are pages rasterized?: No. Original PDF pages are copied with their dimensions and visible vector content.
Are bookmarks and forms merged?: No. This workflow creates a new page sequence; document-level outlines, attachments, forms and signatures are not combined.

Open a related tool to prepare your files or refine the finished result.