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Web file extensions

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

Total extensions in this category: 11

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Extensions in Web

Explore the most searched extensions in this category.

  • .jsx

    JSX (JavaScript XML) source file

    .jsx is JavaScript source code that includes JSX, an XML-like syntax commonly used to write React UI components. You open it in a code editor (for viewing/editing) and typically compile it to plain JavaScript with tools like Babel or TypeScript.

    Open on WindowsOpen on Mac
  • .war

    Web Application Archive (WAR)

    .war is a Web Application Archive used to package Java/Jakarta servlet-based web applications for deployment on a servlet container (for example, Apache Tomcat or Jetty). It is a ZIP-based Java archive that contains application classes, libraries, and web resources in a standard layout.

    Open on WindowsOpen on Mac
  • .wasm

    WebAssembly binary module

    .wasm is the binary module format for WebAssembly, designed to run fast and efficiently in web browsers and other runtimes. You typically “open” it by loading it in a WebAssembly runtime (often via JavaScript in a browser) or by running it with a standalone runtime such as Wasmtime.

    Open on WindowsOpen on Mac
  • .css

    CSS stylesheet

    .css is a Cascading Style Sheets (CSS) text file used to control the look and layout of web pages. You can open it in any text editor, and it is commonly edited with code editors that understand CSS.

    Open on WindowsOpen on Mac
  • .mht

    MHTML (Web Archive) file

    .mht is an MHTML web archive that saves a complete web page (HTML plus images/CSS and other referenced files) into a single file. It’s commonly opened in modern web browsers such as Google Chrome and Microsoft Edge.

    Open on WindowsOpen on Mac
  • .mhtml

    MHTML (MIME HTML) Web Archive

    .mhtml is a single-file web page archive that packages an HTML document together with its images, stylesheets, and other resources using a MIME multipart structure.

    Open on WindowsOpen on Mac
  • .htm

    HTML document

    .htm is an HTML document (a text file that describes a web page). You can usually open it in any modern web browser or a plain-text/code editor.

    Open on WindowsOpen on Mac
  • .svgz

    SVGZ image

    .SVGZ is a gzip-compressed SVG (Scalable Vector Graphics) image. It opens in most software that supports SVG, including modern web browsers and vector editors that can read compressed SVG.

    Open on WindowsOpen on Mac
  • .xml

    XML document

    .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 WindowsOpen on Mac
  • .xul

    XUL web 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 WindowsOpen on Mac
  • .html

    HTML document

    .HTML files are web documents used to structure content on the internet and can be opened in any web browser.

    Open on WindowsOpen on Mac

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