About KeyTester Pro

Building fast, privacy-focused, accessible hardware diagnostic tools for computer users worldwide.

Our Mission

KeyTester Pro was created to provide computer users, hardware technicians, gamers, and software developers with an instant, zero-installation utility to test keyboard hardware directly in any web browser.

Core Engineering Principles

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Ultra-Fast Performance

Built with clean vanilla JavaScript and optimized CSS. Zero heavy client-side frameworks for sub-100ms load times and immediate keypress response.

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Zero Keystroke Logging

Your security and privacy are paramount. KeyTester Pro processes inputs exclusively in client-side memory. Keystrokes never touch a backend server.

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Accessibility & Standards

Designed to comply with WCAG accessibility guidelines, dark mode support, clear visual checkmarks, and responsive design across all devices. Contact us at support@calcolo.biz.id for support or accessibility feedback.