# The loader.io blog News and updates about Loader.io. Loader is a simple, free tool for load testing web sites and APIs. Recent updates Mar 21, 2023 March 2023 updates Updates Announcements Mar 17, 2023 How to verify a target host Verify Howto Troubleshooting Tips Mar 17, 2023 Load testing restricted targets Howto Firewalls IP Address Filtering