Many Lemmy instances are misconfigured, which can break progressive video streaming and even basic image loading in strange ways. The latest default lemmy-ansible config handles this correctly, but many instances use custom proxy setups that cause issues. This tool will check that:

• ✅ The instance supports HTTP range requests for proper video streaming
• ✅ CORS headers are properly set for API and pictrs media

The instance result shows:

discuss.tchncs.de ❌ Error: Failed to fetch