Alternate and Mix PDF

Merge a stack of fronts and a stack of backs into one correctly ordered file.

Free
No signup
Nothing uploaded
No watermark

Scan the fronts, then turn the stack over and scan the backs. The backs come out in reverse order, so leave the reverse option on unless your scanner already fixed this.

Drop a file here

The front sides · read on your device, never uploaded

Drop a file here

The back sides · read on your device, never uploaded

The backs were scanned in reverse order

How to Use the Alternate and Mix PDF Online

Alternate and Mix takes two PDFs, one holding the front sides and one holding the backs, and shuffles them together so page 1 is followed by its back, then page 2, and so on. It exists for single-sided scanners: scan the pile once, turn it over, scan again, then combine the two results here. If the second scan came out back to front, one checkbox reverses it before mixing.

Merges a stack of fronts and a stack of backs into one correctly ordered file. This is the fix for scanning a double-sided document on a single-sided scanner: run the fronts, flip the stack, run the backs, then interleave them here.

No software to install Free Works on any device

Step-by-Step Guide to Using the Alternate and Mix PDF

1

1. Drop in the scan of the front sides, then the scan of the backs
2

2. Leave “the backs were scanned in reverse” on — a second pass through a feeder comes out backwards
3

3. Press Apply & download PDF, and the two are merged into one correctly ordered PDF

No .pdf file to hand? Download a sample PDF file (6.3 KB) and try it.

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What is the Alternate and Mix PDF?

PDF file

.PDF

Merge a stack of fronts and a stack of backs into one correctly ordered file.

At a glance

Takes: Two PDFs: the front sides and the back sides
Gives: One PDF with pages alternating front, back, front, back
Option: "The backs were scanned in reverse order", ticked by default
Keeps: Text selectable and fonts embedded; pages are copied, not reprinted
Runs: Entirely on your computer; neither scan leaves it

Why Organize PDF Pages?

A PDF is easiest to use when its pages are in the right order and hold only what the reader needs. Merging, splitting, rotating and removing pages turns a messy scan or a pile of files into one tidy document.

“A well-ordered PDF saves every reader a little time.”

One file instead of many
No more sideways scans
Smaller parts for email
Blank and spare pages gone

Pages in the right order
Only the pages you need
Booklets ready for printing
Original file left untouched

Popular Uses for PDF Page Tools

These are the everyday jobs that bring people to the page tools.

Job applications Join a CV, cover letter and certificates into one PDF for the recruiter.
Sharing one chapter Pull a single chapter out of a long textbook or report for a classmate.
Fixing phone scans Turn pages that came out sideways or upside down after scanning with a phone.
Reordering a report Move the appendix, cover or index to where it belongs before you send it.
Printing booklets Arrange pages so a folded stack of paper reads like a small booklet.
Double-sided scans Merge separately scanned front and back pages into their proper order.
Removing pages Delete a blank sheet, an old draft page or a page with private details.
Email size limits Split a large PDF every few pages so each part fits an email attachment.

What You Can Do with the Alternate and Mix PDF

Understands PDF structure rather than treating the file as bytes

Rewrites the page tree instead of reprinting, so text stays selectable and fonts stay embedded

Copies only the objects the kept pages need, so one extracted page is not the size of the whole file

Why Use ToolXkit for Alternate and Mix PDF?

Your files stay with you

Everything runs inside your browser. Nothing you open or type is uploaded to a server.

Organize PDF for Different Users

Students

Combine notes, assignments and scanned pages into one file to submit.

Office staff

Put together forms, letters and supporting papers in the order a department wants.

Legal teams

Assemble case bundles and pull out the exhibits needed for a hearing.

Teachers

Split question papers and worksheets, or join them into one printable set.

Small businesses

Group invoices, receipts and quotes by month for the accountant.

Print shops

Rearrange and rotate customer files, and lay pages out as booklets before printing.

Best Times to Rearrange PDF Pages

Page tools are handy when you are:

Sending one file, not five
Fixing a scan that came out sideways
Pulling one page from a long PDF
Printing a folded booklet
Uploading to a size-limited portal
Removing pages with private details
Tidying up a bundle of scans
Preparing papers for a submission

Tips and Good to Know

Both files should hold the same number of pages. If one pile skipped a sheet, count the pages in each PDF first or the pairs will drift out of step.
This only interleaves; it does not straighten or rotate anything. If the backs came out upside down, use Rotate Selected PDF Pages on that file first.
For a single PDF that already contains both sides in the wrong order, Extract Odd Pages and Extract Even Pages will separate them, or Reverse PDF Pages may be all you need.

Frequently Asked Questions

Answers to common questions about this tool.

Do I need to install anything to use the Alternate and Mix PDF?

No. Alternate and Mix PDF runs entirely in your browser — there is nothing to download, no extension and no desktop program. It works the same on Windows, macOS, Linux, Android and iPhone.

Is it safe to use the Alternate and Mix PDF online?

Safer than the usual alternative, yes. Most online tools upload your file to a server you know nothing about, where it sits until someone deletes it. Here the file never leaves your device — the processing happens in the page itself, so there is no server copy to leak, retain or sell.

Will Alternate and Mix PDF lower the quality of my PDF?

No. Rearranging, rotating, splitting or joining pages does not re-compress the text or pictures inside them, so they look as sharp as before. Tools that change the layout, such as booklets, scale the pages without redrawing their contents.

Can I use Alternate and Mix PDF on a phone or tablet?

Yes. It works in Chrome, Safari, Edge and Firefox on phones and tablets as well as computers. Long documents take longer on a phone, but the steps and the result are the same.

Can I rearrange a password-protected PDF?

You need to remove the password first. Use Unlock PDF with the password you already know, then come back and rearrange the pages. None of the tools here can open a file whose password you do not have.

Is Alternate and Mix PDF really free with no watermark?

Yes. There is no charge, no sign-up and no watermark added to your pages. The file you download contains only your own pages, arranged the way you set them.

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