Booklet imposition, saddle-stitch

Turn Any PDF Into a Print-Ready Saddle-Stitch Booklet

Upload a PDF and get back correctly imposed printer spreads — padded, reordered, and ready for duplex printing, folding, and stapling.

Open the free tool Read the how-to guide

Free to use · Files process in your browser · No signup to try

Process

How it works

One

Upload your PDF

Drop in any PDF — a flyer, program, or manual — regardless of its current page order.

Two

Pages are imposed

Blank pages pad the count to a multiple of four and pages are reordered into correct printer spreads.

Three

Print, fold, staple

Download the imposed PDF, print duplex on the short edge, fold the stack once, and staple through the spine.

Capabilities

What the tool actually does

Automatic printer-spread reorder

Converts reader-order pages (1, 2, 3, 4…) into the last-meets-first spreads a duplex printer needs.

Multiple-of-four padding

Adds blank pages at the end automatically so every sheet folds evenly, no manual counting required.

Multi-sheet signatures

Handles booklets that need more than one nested sheet, keeping the spread order correct across the whole stack.

Fit-to-sheet scaling

Places two source pages per sheet side, scaled to fit your chosen output paper size.

Runs in your browser

Layout and reordering happen client-side, so your document does not need to be uploaded to a server to be processed.

Free, no signup

Impose a booklet without creating an account, watching a paywall, or installing desktop software.

Prepress math

Creep calculator

Estimate how far your innermost pages will push outward once the sheets are nested and folded, and how much extra inner margin to allow.

Total page count

Paper weight

Caliper values are typical figures for uncoated offset stock and will vary by mill — check your paper supplier's spec sheet for exact numbers on the stock you have selected.

For 24 pages on 115 gsm stock (6 sheets × 0.16 mm), total creep is 0.96 mm. Allow roughly 1.0 mm of extra inner margin on the innermost spreads, tapering to zero at the outer sheet.

Typical caliper by paper weight (uncoated offset)
Weight (gsm)	Caliper (mm/sheet)
80	0.11
100	0.14
115	0.16
130	0.18
170	0.22

Questions

Frequently asked questions

What is a saddle-stitch booklet?

A saddle-stitch booklet is a set of folded sheets nested inside one another and stapled through the fold line. It is the standard format for programs, catalogs, zines, and short manuals up to roughly 48-64 pages.

How do I turn a PDF into a booklet without Acrobat's built-in booklet printing?

Upload your PDF to the booklet tool, let it pad the page count to a multiple of four and reorder pages into printer spreads, then download the imposed PDF and print it duplex on the short edge.

Why do my booklet pages print out of order?

This almost always means the PDF still has reader-order pages (1, 2, 3, 4) instead of printer-spread order (last page next to first page) or the printer duplex setting is flipping on the long edge instead of the short edge.

How many pages can a saddle-stitch booklet have?

Saddle stitch works well up to about 48-64 pages depending on paper weight. Beyond that the spine bulges, the outer pages creep inward significantly, and perfect binding becomes the more reliable choice.

What is creep and do I need to account for it?

Creep (also called shingling or push-out) is the outward shift of inner pages caused by the thickness of nested sheets. For booklets over about 16 pages on heavier stock, add extra inner margin to keep content from crowding the trim edge.

Does the booklet tool work on Mac and Windows?

Yes. It runs in any modern browser on Mac, Windows, Chromebook, or Linux since the layout work happens client-side rather than in a desktop application.

Is my PDF uploaded to a server?

No. Files process in your browser, so the document does not need to leave your machine to be imposed into booklet order.

Reference

From the blog

Pillar guide