I recently submitted a new tool (PixelTool) to the chrome extension store. Recently whilst working closely with front-end developers, I have been looking for ways to improve how close their work is to the designs I give them. A solution I thought of was to overlay the designs straight onto their HTML. I searched for a tool and found a few. The problem was they got in the way of the interface, and injected controls directly onto the webpage. I decided the best place for this kind of tool was to sit within devtools itself, and only inject the image overlay onto the HTML.
The tool allows a developer to overlay a visual design on to HTML and in real time adjust the opacity and positioning of the image, whilst keeping out of the way in devtools.