W3C Markup Validation Service

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  DMARC Check

  Check DMARC status for the current domain

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  Web Developer

  Adds a toolbar button with various web developer tools. The official port of the Web Developer extension for Firefox.

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  CSS & JS Injector

  Easily customize your browsing experience CSS & JS Injector is a tool for developers, designers, and power users. Apply custom CSS styles and JavaScript to specific websites effortlessly. Boost productivity and customize the look, feel, and functionality of websites without altering its source code.

  रेटिंग: रेटिंग की कुल संख्या: 2

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  Extension source viewer

  View source code of extensions in the Chrome Web Store, Firefox or Opera addon gallery. Has button to install from Chrome Web Store.

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  Blendup

  A tool for web developers to preview blend modes on different page elements.

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