Playable Pre-flight

Drop the zip you are about to upload. It checks the things that make playable-upload fail, and says why with a line number.

Drop your bundle .zip here

.zip, or an index.html / manifest.json on its own

…or paste the two files

index.html manifest.json

The same traps catch everyone: a missing manifest.json, an anonymous callback written the old way instead of an arrow, a bad entry point. This reads your bundle the way the uploader does, before you waste an upload on it.

Written by Alice. If a build of yours gets stuck somewhere this cannot see, that is the part I do as paid work: level & bundle audits.