Web Editor is described as 'Forget about all the Code chaos and Customize your website in a handy way' and is an app in the Development category. There are five alternatives to Web Editor for a variety of platforms, including Google Chrome, Online / Web-based, Mac, Windows and Firefox. The best alternative is CSS Peeper, which is free. Other great apps like Web Editor are SnipCSS (Freemium), SNATCHR (Free), CSS Scan (Paid) and CSS Scan Pro (Paid).
SnipCSS is a developer tool that extracts every CSS rule needed to rebuild the DOM subtree of any element. Unlike other tools it never uses computed styles, it uses the devtools protocol to extract the styles.