gtfs-validator is a Java framework for GTFS validation and statistics. It uses the [https://github.com/OneBusAway/onebusaway-gtfs-modules Onebusaway-GTFS] library, written in Java and is far faster at processing large feeds than the [[FeedValidator]] available from Google.
A fork was developed off of the main [[Conveyal]] branch by user laidig offering the same validator but with additional checks. It can be found [https://github.com/laidig/gtfs-validator here]
*[https://github.com/conveyal/gtfs-validator Conveyal branch]
*[https://github.com/laidig/gtfs-validator laidig fork]