W3C Markup Validation Service

Alakali

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  View Page Source

  Get access to the page source with the click of a button.

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  Pixel converter

  Pixel converter is a crucial web development and design tool for converting pixel values into different measurement units like inches, centimeters, or percentages, ensuring consistency across diverse devices and screens in responsive web design.

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  StyleMaster

  Добавление пользовательских стилей CSS на веб-сайты

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  showHTML

  This extension shows information about HTML elements on a web page when you hover over them.

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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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