ingram-checker 0.1.3

Ingram Lightning Source PDF compliance checker and fixer

ingram-check

A command-line tool that checks PDF files for Ingram Lightning Source compliance and auto-fixes common issues.

Requirements

• Python 3.11+
• Ghostscript (gs) — optional; use --use-ghostscript to prefer it over the native Python backend

Installation

# Install with uv (recommended)
uv tool install .

# Or install in a virtual environment
uv sync

After installation, the ingram-check command is available globally.

Usage

Interior PDFs

# Basic check — auto-detects page size
ingram-check interior book.pdf

# Specify trim size and color type
ingram-check interior book.pdf -t 6x9 -c bw

# With bleed
ingram-check interior book.pdf -t 6x9 --bleed

# Auto-fix (ICC removal, color conversion, crop stripping, downsampling, etc.)
ingram-check interior book.pdf --fix

# Unsafe fixes (includes upsampling low-res images)
ingram-check interior book.pdf --fix-unsafe

# JSON output
ingram-check interior book.pdf --format json

If --trim-size is omitted, the tool detects the page size from the PDF and reports it. An error is shown only if pages have inconsistent dimensions.

Trim sizes can be specified as dimensions (6x9, 5.5x8.5) or aliases (trade, a5, letter, digest, royal, mass market).

Cover PDFs

ingram-check cover cover.pdf -t 6x9
ingram-check cover cover.pdf -t 6x9 -b casewrap --fix

Listing checks

ingram-check interior --list-checks
ingram-check cover --list-checks

Individual checks can be toggled with -e (enable) and -d (disable):

ingram-check interior book.pdf -e bracketed_text -d margins

Checks

Interior (15 checks)

Check	Severity	Auto-fixable
Font embedding	Error
Page count (must be even)	Error	Yes
Page size consistency	Error
Bleed dimensions	Error
ICC profile removal	Error	Yes
Spot color removal	Error	Yes
Color space (Grayscale/CMYK)	Error	Yes
Crop/registration marks	Error	Yes
Ink density (warn 240%, error 300%)	Error
Image resolution	Error/Warning	Yes*
Manufacturing statements	Error
Paper certification claims	Error
Bracketed text	Warning
Margins (0.5" recommended)	Warning
PDF/X compliance	Warning

*Downsampling high-res images is a safe fix (--fix). Upsampling low-res images requires --fix-unsafe.

Cover (9 checks)

Font embedding, page count, cover size, ICC profiles, spot colors, color space, ink density, resolution, and barcode (manual verification).

Auto-fix

--fix applies safe, lossless corrections:

• Pad odd page count with a blank page
• Remove ICC profiles from page resources and image XObjects
• Convert spot colors to CMYK
• Convert RGB to Grayscale or CMYK
• Strip crop/registration marks by setting CropBox = TrimBox
• Downsample images above 375ppi to 300ppi

--fix-unsafe additionally applies fixes that may degrade quality:

• Upsample images below 300ppi (adds pixels via bicubic interpolation, but no real detail)

Fixed PDFs are written to <filename>_fixed.pdf in the same directory.

By default, all fixes use native Python (pikepdf + Pillow). Pass --use-ghostscript to use Ghostscript's pdfwrite device instead.

License

MIT — see LICENSE.