Package Preflight — Pre-Packaging Risk Scanner for Unreal Engine

Find packaging problems BEFORE you package, not after a failed build.

Package Preflight is an editor-only code plugin that scans your project for the most common causes of broken or bloated packages — missing asset references, uncompiled Blueprints, editor-only dependencies in runtime modules, shipping config conflicts, oversized textures, and more.

12 built-in checks:

• Packaging map list validation (empty / missing maps)

• Editor-only references in Runtime Build.cs modules

• Plugin platform allow-list vs. your target platform

• File pollution (.DS_Store, Thumbs.db, desktop.ini, long paths)

• Shipping config risks (e.g. bUseChecksInShipping)

• Pak size hotspots (top 10 largest assets)

• Core Redirects accumulation

• Missing asset references (broken dependencies)

• Blueprint compile status

• Oversized textures

• Localization resource integrity

• Physics Asset associations for Skeletal Meshes

Why you'll like it:

• Non-blocking scanning — rules run progressively with a live progress bar, so the editor never freezes

• Actionable results — every finding shows evidence, consequence and a fix suggestion in a clean severity-coded table

• Clickable asset paths — jump straight to any referenced asset in the Content Browser

• Configurable rule set — enable/disable each rule with per-rule tooltips

• Bilingual reports — full English / 中文 UI, exports in your language of choice

• One-click HTML report — auto-generated after every scan, shareable with your team; JSON export for CI tooling

• Scan history — last 10 scans with error/warning trends

Open from Tools > Package Preflight, hit Scan, and know exactly what will break your package — while there's still time to fix it.