change html on website code example

Example 1: how to edit web pages like a document using console

document.body.contentEditable=true

Example 2: how to change html code of a website

javascript:document.body.contentEditable = 'true'; document.designMode='on'; void 0

Example 3: how to change html code of a website

javascript:document.body.contentEditable = 'true'; document.designMode='on'; void 0