Why is event.keyCode deprecated in modern JavaScript?

The W3C deprecated `keyCode` in favor of `event.key` (character value) and `event.code` (physical key location) for better international keyboard layout support.

Updated: August 2026 • Verified v1.2

JavaScript Event KeyCodes & Keyboard Event Inspector

Developer ToolsHigh Usage

Local Browser Execution: Your input is processed locally in your browser and is not sent to UTL servers.

KeyboardEvent Dispatcher: Window.addEventListener('keydown', e => inspect(e.key, e.code, e.which))

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Understanding Your Results

Captures keyboard events in real-time, displays huge interactive keycode badges, breaks down modifiers (Shift, Ctrl, Alt, Cmd), and provides a searchable keycode master table.

Practical Guidance & Next Steps

Modern web development recommends using `event.key` and `event.code` rather than deprecated `event.keyCode`.

What is this?

A developer productivity utility that captures and displays keyboard event properties for JavaScript frontend development.

How does it work?

1. Press any key on your keyboard. 2. Instantly view keycode badges, `event.key`, `event.code`, and modifier flags. 3. Search the reference table or copy JS event snippets in 1 click.