Check scope
The 21 automatic checks cover six groups of browser-visible information: exit region and network ownership, proxy and WebRTC, timezone and locale, browser and platform, storage and device capabilities, plus supporting canvas, WebGL, and font signals.
Some checks establish whether data is available and others look for major conflicts. Not every item creates a risk finding.
What P1 through P4 mean
| Priority | Purpose | Typical interpretation |
|---|---|---|
| P1 | Review first | Strong conditions such as obvious hosting, automation, or unsupported region |
| P2 | Important combined signal | Major timezone and exit-region conflict |
| P3 | Moderate caution | Clock skew and compatibility or consistency issues |
| P4 | Supporting context | Language, fonts, locale preference, and browser version |
Weak signals do not raise the result alone
Chinese language, CJK fonts, emoji, locale formats, and screen details may reflect ordinary personal preferences. They can explain browser exposure but cannot prove identity, physical location, or prohibited intent.
Why there is no 0-100 ban probability
This site does not know Anthropic's real model, weights, account history, or server-side decisions. Converting limited browser signals into “73% likely to be banned” would create false precision, so the result provides evidence levels and a review order instead.
The supported-region list and browser baselines were verified on 2026-07-18 and will receive a new verification date only after a substantive update.
Check the current browser environment
Return to FK Claude and review 21 browser-visible signals for free. The result is a self-check reference only.
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