…is what I have just programmed. The interface is bare-bones, as is usual with me, but the functionality is good. It works like this: you type any text into the left part – the large text field. You can also paste it in – either way it is automatically converted into the second field, and if you have a supported browser (Opera, Chrome, IE with clipboard access allowed; only Firefox does not support it), the converted text is also copied to the clipboard.
However, it checks on every key press, so if you want to copy the text from the first field, the text gets converted and copied with HTML entities. On other similar sites I inexplicably ran into the problem that you could not select all the text with ctrl+a in the result field; here I do not block it in any way. And what are HTML entities? They are characters that have been replaced with “harmless” ones, because their original form would clash with HTML code. The most classic example is the characters >< , so try typing them there, along with any other text.
And almost everything is calculated dynamically or in percentages, so when you open it on a phone or a larger device, it should automatically stretch to the full width. Links: There used to be data here. Now there is just an empty lot on the internet. The application itself, runnable in any browser PS: I have already fixed copy&paste, it was making the application unusable.