Key Takeaway (TL;DR): Many providers only expose Clash YAML feeds. Utilizing public online conversion sites risks token hijacking and node bandwidth theft. This guide covers two secure approaches: self-hosting Subconverter locally via Docker to ensure 100% offline conversion, and understanding the parameter mapping between Clash YAML properties and Sing-box JSON outbound descriptors.
1. Security Risks of Public Converters
Public web converters often log subscription URLs and resell bandwidth. Self-hosting Subconverter locally via Docker guarantees full privacy.