I'm very confused on what you want
But here's a nice trick for you anyway, that could be what you're looking for.
Edit any website:You'll need javascript installed.
Open up a browser (I know this works on Chrome) then go to a website you want to edit and simply type the following into the address bar.
javascript:document.body.contentEditable='true'; document.designMode='on'; void 0
Then press enter and walla, the website is editable. Simply click some text and start typing away.
Note that the edits are completely client sided and temporary, in other words, if you edit the website it only edits the website on your computer, anyone else going onto the website will not notice a difference. As well, as soon as you close the browser/tab or go to a new website, the edits will be removed. It's still pretty fun editing news stories on a news sight and making them silly, then freaking your friends out with the made up stories haha.
Also note: To make it really accessible, try making a bookmark on Chrome with the link as the javascript. That way all you have to do is push a button and the website becomes instantly editable.