IMPOSITION
FORGE
Drop your PDF. Forge your book.
Drop in your PDF. Choose your binding format. Get a press-ready imposed file in seconds — for every binding format, every fold layout, every book size.
Fully offline · One-time purchase · No subscription
Drop in your PDF. Walk out with a print-ready file.
Imposition Forge handles every step of the imposition workflow — from PDF loading through format selection, margins, marks, preview, and export.
Drag-and-drop PDF loading
Drop any PDF onto the zone. Page count, sheets, signatures, and arrangement appear in the live stats panel instantly — no configuration required.
9 signature format cards
Single section, multiple signatures, booklet, perfect bound, pamphlet, Coptic stitch, long stitch, and two miniature-specific layouts. One click to activate.
Four fold layouts
Folio (2 pages), Quarto (4), Octavo (8), and Sextodecimo (16) — shown as fold diagram cards. Each produces different sheet arrangements.
Full paper setup
All standard paper sizes plus custom dimensions. mm, inches, and points. Printer type selection and source rotation for landscape PDFs.
Live in-app preview
Click Preview and the imposed layout appears in a full-panel overlay before you export. Check sheet arrangement, margins, and marks before committing.
ZIP export
The Forge PDF button outputs a ZIP: choose both files, aggregated only, or individual signatures. Print one gathering at a time on a home printer.
Margins & crop marks
Head, tail, fore-edge, and binding margin controls. Toggle crop marks and cut marks independently. All measurements in points with live preview.
Folding guides built in
Rotation diagrams, fold guides, and a signature length reference table — all accessible inside the app without leaving. Click any diagram for a full-size lightbox.
Every binding method. One app.
From traditional sewn signatures through modern perfect binding to hand-craft stitch patterns — Imposition Forge handles the imposition maths for all of them.
Single section & multiple signatures — the two standard formats for sewn and glued books of any length.
Coptic, long stitch & pamphlet — open-spine and hand-sewing structures for artist’s books and journals.
Miniature 2-up & stab binding — two miniature-specific layouts. The only imposition tool with dedicated miniature book support.
Powered by bookbinder-js 1.3.1 (MPL-2.0) — a rigorously tested open-source imposition library trusted by bookbinders worldwide.
All pages in one gathering, or split into multiple individually-folded signatures. Standard for sewn case-bound books of any length.
Open-spine and side-sewn structures for artist’s books, journals, and decorative hand-bound editions.
Two small books on one sheet, or side-sewn stab binding layout — dedicated support for sub-76mm book formats.
Made by a miniature book enthusiast. For miniature book enthusiasts.
Imposition Forge was built by someone who makes miniature books. The wacky imposition formats, miniature-specific layouts, and Sextodecimo fold format are all designed with small-format production as the primary use case.
Miniature 2-up — two small books on one sheet. Cut and fold to produce two identical copies.
Japanese stab layout — side-sewn stab pattern for the distinctive hand-crafted binding style.
Sextodecimo fold — 16 pages per leaf, ideal for very small signatures and miniature quire books.
Custom paper sizes — any width and height. Named presets for standard miniature formats in the next update.
Truly offline.
Fully yours.
No subscription
One-time purchase, lifetime updates. The app you buy today works in ten years.
No internet required
All features work offline. No API calls, no cloud processing, no outages.
Your files stay local
PDFs are processed entirely on your machine. Nothing is uploaded to any server.
3 installs per licence
Install on your main machine, laptop, and a backup — all from one purchase.
The Forge Suite
Eight apps. One complete book creation and publishing ecosystem. All offline, all one-time purchase.
Drop your PDF. Forge your book.
Fully offline · One-time purchase · No subscription · Windows 11 only at this stage
Windows 11 only at this stage · One-time purchase · No subscription
Also in The Forge Suite bundle →