Proxy rotates but all requests fail Solution: Go to Proxy Manager > Test All. YKBuilder v5.3 marks dead proxies and can auto-remove them. Ensure your proxies support CONNECT method.

| Metric | YKBuilder 5.2 | HTTrack 3.49 | | |--------|---------------|--------------|---------------------| | Total Time | 22 min | 31 min | 14 min | | RAM Peak | 1.8 GB | 900 MB | 1.1 GB | | Failed Requests | 143 | 287 | 21 | | JS Execution | No | No | Yes | | Proxy Rotation | Manual | No | Auto |

“Headless Chromium failed to launch” Solution: Install the standalone Chromium package or run ykbuilder --install-browser from CLI.

If you rely on web scraping, site mirroring, or offline development, represents the most capable tool in its class. The combination of JS rendering, smart proxy handling, and low resource consumption makes it suitable for both occasional users and automated pipelines.