Convert Keycodes to ASCII Decode decimal legacy DOM keyCode-style values into ASCII characters using the same defined US keyboard reference as the reverse tool.
Use it when inspecting historical keyboard-event logs or old JavaScript data that recorded keyCode values instead of modern event properties.
Start with the built-in sample, then replace it with a short test value that makes the rule obvious. Small examples are easier to verify because you can count the characters, positions, or numeric codes by hand before using longer input.
The input is not a physical scan-code stream and it is not a USB HID report. Keycodes describe a legacy browser event convention, so their meaning depends on the reference mapping rather than the physical electrical signal from a keyboard.
Test a few obvious values such as 65 for A and 32 for space before decoding a larger sequence.
Because keyCode is deprecated, use this converter for analysis or migration of old data rather than designing a new application around it. The transformation happens locally in the browser, so there is no upload step or external conversion service.