Free, 100% local browser tools for the China AI arbitrage crowd. Nothing is ever uploaded.
Scans 9 environment signals to estimate whether Claude Code would flag you as a China user. 100% local, nothing uploaded.
Open tool →See exactly what your browser environment reveals — timezone, language, fonts, device and more — with a privacy note per signal. No score, no verdict.
Open tool →Detection engine based on LinXiaoTao/FuckClaude (MIT)