InkAlign Suite

Publishing tools for indie authors

A focused set of utilities for trim, spine, and print-ready PDFs — the same rigor you expect from pro layout software, without the learning curve.

Standard publishing trims — the sizes we support are the same book blocks you will see across major print-on-demand and offset workflows, including Amazon KDP, IngramSpark, Lulu, and Blurb. Each platform has its own file checks and may offer extra or custom trims — always confirm the final spec in your printer's dashboard. On KDP specifically, 5×8, 5.5×8.5, 6×9, and 8.5×11 are among the most picked presets; our tools still apply whenever your interior matches one of the listed standard blocks.

Not sure which interior trim to use? See the full trim guide in Help.

Journals, planners & logbooks

Publishing low-content titles at scale?

Ghostwriters and KDP studios often ship many journals, trackers, and planners each month. Our journal & planner interior composer is built for that pipeline — standard trims, reusable page blocks, and print-ready PDFs generated locally in your browser.

Publisher overviewOpen composer

  • KDP Interior Auto-Fixer (6×9)

    Normalize 6×9 interiors with KDP bleed, mirror margins, and gutter tiers. Health scan, watermarked preview, and print-ready export after checkout.

    Open Tool

  • KDP Interior Fixer (5×8)

    Same gutter, bleed, mirror-margin, and flattening pipeline as 6×9 — targets 5.125" × 8.25" print pages for 5" × 8" paperback trim.

    Open Tool

  • KDP Interior Fixer (5.25×8 — Fiction)

    Fiction trim

    Same pipeline as 6×9 — targets 5.375" × 8.25" print pages for the popular 5.25" × 8" fiction paperback trim.

    Open Tool

  • KDP Interior Fixer (5.5×8.5 — Self-help, Nonfiction)

    Nonfiction trim

    Same pipeline as 6×9 — targets 5.625" × 8.75" print pages for the common 5.5" × 8.5" self-help and nonfiction trim.

    Open Tool

  • KDP Interior Fixer (6.14×9.21 — Standard trade paperback)

    Trade trim

    Same pipeline as 6×9 — targets 6.265" × 9.46" print pages for the standard 6.14" × 9.21" trade paperback trim (slightly larger than classic 6" × 9").

    Open Tool

  • KDP Interior Fixer (7×10 — Workbooks, Journals)

    Large trim

    Same pipeline as 6×9 — targets 7.125" × 10.25" print pages for 7" × 10" workbooks, journals, and other larger paperback interiors.

    Open Tool

  • KDP Interior Fixer (8×10 — Manuals, Illustrated books)

    Wide trim

    Same pipeline as 6×9 — targets 8.125" × 10.25" print pages for 8" × 10" manuals, illustrated guides, and other wide-format interiors.

    Open Tool

  • KDP Interior Fixer (8.5×11 — Textbooks, Planners, PDFs)

    Letter trim

    Same pipeline as 6×9 — targets 8.625" × 11.25" print pages for 8.5" × 11" textbooks, planners, and interiors exported from letter-size PDFs.

    Open Tool

  • KDP Interior Fixer (8.25×6 — Comics, Manga style)

    Landscape

    Same pipeline as 6×9 — targets 8.375" × 6.25" print pages for 8.25" × 6" landscape trim — comics, manga-style spreads, and other wide-format illustrated interiors.

    Open Tool

  • KDP Interior Fixer (8×8 square — Photo books, Kids books)

    Square

    Same pipeline as 6×9 — targets 8.125" × 8.25" print pages for 8" × 8" square trim — photo books, picture books, and illustrated titles for kids.

    Open Tool

  • KDP Interior Fixer (8.5×8.5 square — Photo books, Kids books)

    Square

    Same pipeline as 6×9 — targets 8.625" × 8.75" print pages for 8.5" × 8.5" square trim — larger photo books, gift books, and kids' illustrated interiors.

    Open Tool

  • PDF size & metadata inspector

    In-browser

    Upload any PDF to see every page width and height in inches and points, rotation, MediaBox, document properties, XMP metadata when present, and suggested InkAlign interior tools — no third-party sites and nothing uploaded to our servers.

    Open Tool

  • Back matter PDF generator

    In-browser

    About the Author, Also By, and a newsletter page with optional QR at InkAlign interior bleed sizes — merge onto your own interior PDF when the first page matches the trim. Requires sign-in with an active trial or paid plan.

    Open Tool

  • Journal & planner interior composer

    In-browser

    Mix dot grid, lined, square grid, habit tracker, recipe log, checklist, and reading log pages at InkAlign bleed sizes — export a print-ready PDF locally for journals, planners, and activity books. Requires sign-in with an active trial or paid plan.

    Open Tool

  • A+ style cover canvas

    Local only

    Paperback, tablet, e-reader, and desk mockups from your cover PNG/JPG or PDF (page 1). Drag to position, export PNG presets — no AI and nothing uploaded to InkAlign.

    Open Tool

  • Spine Width Calculator

    White vs cream paper thickness factors — instant spine estimate in inches for cover design, with one-click copy for your template.

    Open Tool

  • Cover validation

    Upload your KDP wrap PDF — we measure it with pdf-lib and compare to spine + trim + bleed. Download a blank template at the exact size.

    Open Tool

  • IngramSpark layout guides

    Interior odd/even pages with three-edge bleed plus a paperback wrap schematic — PDFs you can hand to a designer or use as a layout sanity check (not a replacement for Ingram's official templates).

    Open Tool
  • Coming Soon

    CMYK Color Verifier

    Spot RGB-only assets and out-of-gamut risks before you upload — built for KDP print color expectations.

  • Coming Soon

    Barcode Generator

    ISBN-13 barcode blocks sized for KDP cover templates — placement guides and safe margins included.

Tool

Spine width calculator

Quick estimate for a paperback spine before you design your cover. For the exact value, use Amazon's KDP cover template after you set trim and paper.

Estimated Spine Width: 0.4504 in

Formula: page count × paper thickness per page. Estimate only — confirm with KDP's cover template before printing.

Tool

Cover validation

Check your paperback wrap PDF against KDP-style dimensions: width = 2 × trim width + spine + 0.25″ bleed, height = trim height + 0.25″ bleed. Spine uses white (0.002252″/page) or cream (0.0025″/page). Always confirm in KDP before publishing.

Blank template

One empty page at the exact target width × height (white).

Tool

IngramSpark layout guides

Download annotated PDFs for three-edge interior bleed (no bleed on the bind) and a paperback wrap schematic sized like InkAlign's KDP cover check (white 0.002252″/page, cream 0.0025″/page). These files are teaching aids only — always run your final numbers through IngramSpark (Cover Template Generator + current print guidelines).

Not a substitute for IngramSpark's official emailed templates, crop marks, or barcode placement. Remove guide tints before print if you trace these into production art.

IngramSpark Help Center (file creation)

Interior (two PDF pages)

Odd (recto) and even (verso) with bleed on the fore edge, top, and bottom; bind edge flush to trim — per IngramSpark-style interior guidance.

Paperback cover wrap (one PDF page)

Full spread width uses the same 2×trim + spine + 0.25″ model as our KDP cover validator, with spine safety bands drawn from Lightning Source cover notes.

IngramSpark site

Single Fix from $9.99 unlocks the full interior pipeline. More tools ship here first — no bloat, just what authors actually print.