Make Input or Textarea Read-Only in HTML

By adding the readonly attribute to an input element or a textarea element in HTML, you can prevent the contained value from being edited:

<input readonly value="You can't edit me!">

<textarea readonly>You can't edit me!</textarea>

The readonly differs from the disabled attribute, but the difference is purely stylistic (browsers typically gray out fields with the disabled attribute).

Conclusion

That’s all!

One of many example use cases is presenting the user with an input that contains a SMS verification code to be copied, but not edited.