Remarklet
Edit any web page.
Activate DemoJust run this in your browser's address bar (and double-check that "javascript:" is at the start):
javascript:(function(){let script=document.createElement('script');script.src='https://unpkg.com/@zw/remarklet/dist/remarklet.min.js';document.head.appendChild(script);script.onload=()=>{remarklet.options({hide:true});remarklet.activate()}})();
Or save it as a bookmark URL and then click to activate it. Example: Remarklet.
Easy to Use

Save & Restore

Touchscreen Compatible

Remarklet is the fastest way for product managers and UI/UX designers to communicate and test ideas directly on live web pages - without waiting on dev cycles or digging into code. Whether you're suggesting a new layout, tweaking copy for clarity, or reviewing a user flow, Remarklet lets you visually edit, rearrange, and annotate any website in seconds. It’s perfect for stakeholder reviews, prototyping in context, and bridging the gap between vision and implementation.
It was created by a web developer with an art degree to be the easiest way to mock up changes to your existing website.