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Trusted file extension guides and opening help from the original project since 2008.

Web file extensions

Web markup, stylesheet, and related assets used by browsers and web platforms.

Total extensions in this category: 6

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Extensions in Web

Explore the most searched file types in this category.

  • .css

    CSS Document File

    .CSS files are used for web pages, browser rendering, and front-end assets. Open with web browsers, code editors, or build tools for web development. This guide covers opening methods, troubleshooting, and security best practices. Common MIME type: text/css.

    Open on Windows Open on Mac
  • .htm

    HTM Document File

    .HTM files are used for web pages, browser rendering, and front-end assets. Open with web browsers, code editors, or build tools for web development. This guide covers opening methods, troubleshooting, and security best practices. Common MIME type: text/html.

    Open on Windows Open on Mac
  • .svgz

    SVGZ Image File

    .SVGZ files are used for web pages, browser rendering, and front-end assets. Open with web browsers, code editors, or build tools for web development. This guide covers opening methods, troubleshooting, and security best practices. Common MIME type: image/svg+xml.

    Open on Windows Open on Mac
  • .xml

    XML Document File

    .XML files are used for web pages, browser rendering, and front-end assets. Open with web browsers, code editors, or build tools for web development. This guide covers opening methods, troubleshooting, and security best practices. Common MIME type: application/xml.

    Open on Windows Open on Mac
  • .xul

    XUL Document File

    .XUL files are used for web pages, browser rendering, and front-end assets. Open with web browsers, code editors, or build tools for web development. This guide covers opening methods, troubleshooting, and security best practices. Common MIME type: text/xul.

    Open on Windows Open on Mac
  • .html

    HTML Document File

    .HTML files are used for web pages, browser rendering, and front-end assets. Open with web browsers, code editors, or build tools for web development. This guide covers opening methods, troubleshooting, and security best practices. Common MIME type: text/html.

    Open on Windows Open on Mac

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