The Snowplow Chrome Extension is a Chrome extension purposefully built for helping developers debug Snowplow implementations.
It is available for download from the Chrome Web Store.
Custom schema validation with easy overview (marks bad events in red)
Add your own Iglu servers
Event schema validation details
Collector override for easy debug
Export to CSV
Here's a 1 minute demo of the Snowplow Chrome Extension, a must have if your organization is working with Snowplow!.