Format PDFs Into Imposed, Print-Ready Sheets for Bookbinding

Folio arranges your pages into printer-ready signatures, right in your browser. Your PDF never leaves your device.

  • Your PDF stays in your browser
  • No cloud processing
  • No account to start
  • Free to try
Try It Free
  • Bar clamps applying even pressure to a text block in a home workbench press
  • Deckled fore-edge on a navy cased book, ready to trim
  • Finished quarter-bound book, red cloth and leather
  • Homemade sewing frame with tapes under tension
  • Open book with a hand-dyed green fore-edge, text visible on the page

Imposition, Calibration & Assembly Tools

Precision imposition

Pages are reordered and positioned with sub-millimeter accuracy for folio and multi-section layouts, so your signatures fold perfectly.

Imposition layout preview

Calibrated to your printer

Every printer clips margins differently, and duplex rarely lines up on the first try. Folio's setup wizard prints a test sheet with built-in rulers, walks you through what you measure, and compensates for your specific printer, so the imposition you see is the imposition that prints.

Choose your printer typeDownload and print the test pageFolio calibration sheet with built-in rulersTell Folio what happenedDuplex alignment calibrationCheck duplex rotationReady to go: all settings confirmed

Sewing templates & assembly marks

Generate sewing station templates, fold marks, and collation marks. Everything you need to go from printed sheets to a bound book.

Sewing template example

Page prep tools

Add or remove pages, detect and strip existing page numbers, or add new ones in your preferred style. Get your PDF ready for binding before imposition even starts.

How It Works

  1. Upload your PDF

    Drop any PDF into Folio. Everything stays in your browser. Nothing is uploaded to a server.

  2. Choose your binding

    Pick a binding style and paper size. Folio arranges pages into signatures automatically.

  3. Export your print-ready PDF

    Download imposed sheets ready for your printer, complete with fold marks and sewing guides.

Three Ways to Work

Three modes for every skill level, from first-timers to experienced binders.

Quick & simplePrint & FoldArrange your pages into a single signature: one folded, stapled section. Choose your paper and print.Always Free
Sewn or gluedGuided BinderBuild a book from several signatures. Sew them into a text block, or glue the spine instead (perfect or double-fan/Lumbeck binding). Step-by-step guidance either way.5 Free Exports
Full controlExpert LayoutFull control over creep compensation, custom signature sizes, sewing-station spacing, or a glued spine (perfect or double-fan/Lumbeck binding).Pro

Print & Fold is always free. Guided Binder includes 5 free exports with a free account.

Pricing

Start free. Pro from $4/month, billed annually.

Billing frequency
Pro$7/month

Billed monthly. Save ~43% with annual.

  • Everything in Free
  • Expert Layout: full control
  • Unlimited exports in all modes
  • Editing features
Get Pro
Free$0/forever
  • Print & Fold: unlimited
  • Guided Binder: 5 free exports
  • Printer calibration
  • Sewing templates
  • No account required to start
Try Free

Frequently Asked Questions

Is my PDF uploaded to a server?

No. Folio runs entirely in your browser. Your files never leave your computer: there is no server upload, no cloud processing, and no account required to get started.

What binding styles does Folio support?

Folio supports saddle-stitch booklets (single-section), multi-section sewn bindings, and perfect binding. The Print & Fold mode handles simple booklets; Guided Binder walks you through multi-section books; Expert Layout gives full control over any imposition.

Do I need a special printer?

Any home or office printer that handles your chosen paper size will work. Folio includes a built-in calibration tool to compensate for your printer's margin and duplex quirks.

Does Folio need an internet connection?

You need a connection to load the app, but all PDF processing happens in your browser. Nothing is sent to a server. Once loaded, imposition and preview work without further network requests.

What does "5 free exports" mean for Guided Binder?

You can use Guided Binder to configure and preview your book as many times as you want. Your first 5 Guided Binder exports are free after creating an account, counted by unique source file. After that, exporting new Guided Binder books requires a Pro subscription.

Can I print on both sides of the paper?

Absolutely. Folio supports automatic duplex (if your printer has it) and manual duplex with step-by-step instructions. The calibration tool ensures front and back align correctly.

Upload a PDF and start imposing

Upload a PDF and start binding. No account required.

Try It Free

From the Blog

Calibration & Printing: Why Your PDF Looks Wrong

Why an imposed PDF prints shrunk, shifted, or upside-down on the back, and the exact driver settings that fix each one on Linux, macOS, and Windows.

Page Numbering in Bookbinding

Why imposition lands page numbers on the wrong edge or upside-down. How Folio finds the old numbers, removes them, and re-stamps from the original index.

How to print a PDF as a book on a home printer

Rearrange the pages so they fold into reading order, print double-sided, bind the stack. Signatures and binding styles covered. Free, in your browser.

How to bind your creation

Turn a novel, comic, poetry collection, or RPG rulebook into a real book: one folded booklet or sewn signatures, with page numbers and creep under control.

How to print a zine at home

Print a saddle-stitch zine at home: why it never prints in 1, 2, 3 order, how many pages it needs, what paper to use, and how to fold and staple it.

How to turn an AO3 fic into a real book

Get the fic from AO3, fold it into printable signatures in your browser, then sew or staple it. Free, no install. The fic never leaves your computer.

What Is PDF Imposition? A Guide for Bookbinders

Imposition rearranges a PDF's pages so they read in order after folding. Why the shuffle changes with the binding, and how to try it free in your browser.

Free PDF Imposition Tools Compared for Bookbinding

pdfimpose.it, PDF Snake, Acrobat, InDesign, Montax, pdfjam, and pdfpress.app, measured against a prepress handbook’s criteria, creep handling included.

Signature Size Guide: 4, 8, 16, or 32 Pages?

How many sheets go in each signature: why 3 to 5 is the normal range, how paper thickness moves that number, and how to set it in Folio.

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