Foundry Package Gate — Offline Module ZIP Preflight

Your source project can look correct while the final ZIP is wrong.

Foundry Package Gate checks the artifact you are actually about to ship. Drop in a module ZIP and get a readable pass/fail gate plus Markdown and JSON evidence in under two minutes.

Checks include

• ZIP and ZIP64 readability;
• stored, deflated, and data-descriptor entries;
• encrypted entries and unsupported compression;
• unsafe paths and cross-platform filename collisions;
• exactly one discoverable module.json;
• manifest JSON, required identity fields, and portable package ID;
• compatibility version ordering;
• declared scripts, ES modules, styles, languages, and pack paths;
• suspicious development residue and fragile filenames;
• HTTPS shape for manifest/download URLs.

Private by design

The standalone HTML runs locally. No upload, account, server, analytics, CDN, or internet connection is required.

Included

• standalone offline HTML app;
• passing and broken example module ZIPs;
• real sample Markdown and JSON reports;
• start guide, limitations, changelog, FAQ, and license.

What remains manual

Runtime testing inside Foundry VTT, publication, marketplace submission, compatibility testing, and licensing review.

This is an unofficial independent tool. It is not affiliated with or endorsed by Foundry Gaming LLC and does not guarantee runtime correctness or marketplace acceptance.