Environment Signals Check
Review device environment signals such as fonts, audio context, and storage estimates.
What this tool checks
It inspects fonts, audio context fingerprints, storage estimates, and device capabilities.
These signals are commonly used to build persistent device profiles.
Why it matters
Even without cookies, environment signals can help identify a device.
Combining multiple small signals increases fingerprint uniqueness.
How to read results
Large changes after updates indicate low stability of the fingerprint.
Compare across browsers to see which ones expose more detail.
Permissions and prompts
Some checks can trigger permission prompts for audio or device access.
Declining permissions may reduce available signals, which is expected.
Reducing exposure
Limit API access and use privacy‑focused browsers or profiles.
Prefer per-site permissions instead of global allowances.
Limitations
Results vary by hardware, OS, and browser engine.
Virtual or cloud environments can produce unstable outputs.