GWG 2022 · 39 rules · 23 variants · TP/FP/FN/TN scoring · verapdf-verified · MIT

How Accurate Is Your
Preflight Engine?

Open-source benchmark kit for PDF preflight engines. AssayPDF generates a deterministic GWG 2022 test corpus, runs it through callas pdfToolbox, Enfocus PitStop Server, and lintPDF under one harness, and produces reproducible accuracy reports.

View on GitHub

How accurate is your preflight engine?

AssayPDF gives the print industry the public, reproducible GWG 2022 benchmark it never had — a deterministic test corpus, a uniform harness, and per-rule scoring across the major preflight engines.

GWG 2022 Coverage

39 rules across 23 variants of the Ghent Workgroup 2022 specification, codified into a single test matrix. The first public corpus for the new spec.

Deterministic Corpus

~175 PDFs generated byte-identically from a seed: 23 positive baselines plus 152 negative failure-mode files, each targeting exactly one rule.

Uniform Harness

One CLI runs the same corpus through callas pdfToolbox, Enfocus PitStop Server, and lintPDF — so the only variable in the comparison is the engine.

TP/FP/FN/TN Scoring

Per rule, per variant, per engine. Surface where each preflight tool over-flags, under-flags, or gets it right — with the receipts to back the score.

Reproducible Reports

Markdown and HTML accuracy reports rendered from the run artifacts. Diff two engine runs or two engine versions side by side, in CI or locally.

Hash-Verified Provenance

Vendor inputs are fetched from GWG canonical URLs with SHA-256 verification, and every generated PDF is validated against PDF/X-4 (ISO 15930-7) by verapdf before it enters the corpus.

Open By Default

MIT-licensed corpus, harness, and reports. The GWG 2015 Compliancy Test Suite is gated to vendor members — AssayPDF closes the gap for GWG 2022.

Open source · managed hosting

Independent tools. Pick the ones you need.

A toolkit of focused, standalone PDF utilities — extraction, preflight, viewing, assembly, imposition planning, and an asset store. Each one plugs into the prepress workflow you already run. Use the open source yourself, or let us host any single tool for you on work.withsynergy.io.