Keystroke-Level Model Analyzer Privacy Policy

Last updated: 2026-05-27

Keystroke-Level Model Analyzer is a Chrome extension for recording a web task flow and converting the interaction trace into an auditable Keystroke-Level Model estimate.

Data Stored

Keystroke-Level Model Analyzer stores measurement data locally in Chrome extension storage on your device.

The extension may store:

• Task name
• Task URL
• Click labels inferred from visible element text or accessibility labels
• Click role classification, such as command or argument selection
• Pointer coordinates and element bounds for pointing estimates
• Typed character counts
• Scroll burst metadata
• System response timing candidates
• KLM estimate, operator counts, and audit metadata
• Recent measurement history

Data Not Stored

Keystroke-Level Model Analyzer does not intentionally store:

• Typed text values
• Passwords
• Form field contents
• Screenshots
• Cookies
• Authentication tokens
• Full page HTML

Typed input is recorded as character counts only.

Data Sharing

Keystroke-Level Model Analyzer does not send measurement data to any server.

Keystroke-Level Model Analyzer does not sell data, use third-party analytics, or share measurement data with advertisers.

Permissions

Keystroke-Level Model Analyzer uses Chrome extension permissions to:

• Start measurement from the current active tab after a user action
• Inject the measurement overlay and recorder into that active tab
• Store recent measurements locally

User Control

You can clear recent measurements from the extension popup.

You can remove all stored extension data by removing the extension from Chrome or clearing extension site data in Chrome.

Contact

For questions or issues, use the GitHub repository issue tracker.