What stays local
Your selected PDF is handled in this browser session. BQ PDF Tools does not add your document to the offline cache or upload it to an application server.
Organize PDF tool
Alternate and Mix PDF Pages
Alternate pages from two PDFs, including front-side and back-side scan batches, entirely inside your browser.
Choose two PDFs
Processing happens locally in this browser. Keep this tab open until the result is ready.
Drop exactly two PDF files hereor select files from this device · adaptive limit based on this device
Settings restored for this tabNon-text options from the previous page load were restored. Files and filenames were not saved.
Useful for two-pass duplex scans.
Choose a file to begin.
Processing did not finish
Diagnostics include the tool, browser, file count, total size, and visible error—but never filenames or document contents.Your selected files and settings are still available.
Trust and output notes
Use this quick checklist before replacing an important PDF.
What this tool preserves
- Original page content is copied without screenshot conversion when possible.
- The original file is never changed.
- Page order and selection are visible before download.
What to check
Encrypted, damaged, very large, or unusually structured PDFs may fail. Keep the original until the output is checked.
Practical examples
Example 1
Fix a scan where page 3 appears before page 2.
Example 2
Remove blank pages before emailing a document.
Example 3
Extract only the signed pages from a larger packet.
How to alternate and mix pdf pages
Step 1
Choose exactly two PDF files and arrange them as Document A and Document B.
Step 2
Choose the starting document and reverse Document B when rebuilding duplex scans.
Step 3
Mix the pages and preview the combined PDF.
What this tool does
Document A and Document B can be mixed A1, B1, A2, B2 or in the opposite starting order. Reverse Document B to rebuild a duplex scan made in two passes.
Privacy note: selected files are handled by JavaScript running on your device. The application does not intentionally transfer document contents to a BQ server. Browser extensions, managed-device policies, and the browser itself remain outside the site’s control.
Compatibility note: PDF is a complex format. Very large, encrypted, malformed, digitally signed, or unusually constructed files may not process correctly. Keep the original document until you have checked the result.
Frequently asked questions
When should I reverse Document B?
Reverse it when the second scan pass contains the back sides in reverse order, which is common with manual duplex scanning.
What if the PDFs have different page counts?
You can append remaining pages or stop after the shorter document ends.
Can I change which PDF contributes the first page?
Yes. Choose Document A or Document B as the starting source.
Related PDF tools
Continue your document workflow.
Merge PDF
Combine multiple PDF files in your chosen order.
Split PDF
Create separate PDFs from pages or page ranges.
Compress PDF
Choose text-preserving or scan-focused PDF compression.
Rotate PDF Pages
Select page thumbnails and rotate them visually.
Delete PDF Pages
Select thumbnails and remove unwanted PDF pages.
Extract PDF Pages
Select page thumbnails and create a focused PDF.