1) Head over to the web page you want to edit.
2) In the browser’s address bar, paste this code:
javascript:document.body.contentEditable=’true’; document.designMode=’on’; void 0
if the above code doesn’t work then click on the link below for the code(WordPress doesn’t allow its users to put javascripts in its blog)
3) Now click on the part of the page you want to edit and start changing, deleting and adding text.
you can do what ever you want to do with any website,webpage,blog or anything.