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.WOFF2 file extension

To open .WOFF2 files on Windows, if you’re a web developer: add the .woff2 file to your site and reference it from CSS using an @font-face rule, then open the page in a browser to see the font applied.

To open a .woff2 file, use it as a web font in a webpage (for example with CSS @font-face) and view the result in a modern browser. If you just want to inspect the file, you typically do that from development tools or font tooling rather than by double-clicking it.

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Last updated: June 12, 2026

Open on your device

Choose your operating system for a dedicated step-by-step opening guide.

How to open .WOFF2 files

Use these platform-specific instructions to open .WOFF2 files safely.

Windows

  1. If you’re a web developer: add the .woff2 file to your site and reference it from CSS using an @font-face rule, then open the page in a browser to see the font applied.
  2. If you received a .woff2 file and just want to see what it is: treat it as a web asset; open it from your editor/dev tools and use it in a test HTML/CSS page rather than trying to install it like a normal desktop font.
Full Windows guide

Mac

  1. Use the .woff2 file in a webpage: reference it from CSS @font-face and open the page in a browser to verify it renders.
  2. For inspection/debugging, keep it as a web asset and examine how it loads in the browser’s developer tools (network/fonts) rather than expecting Font Book to install it.
Full Mac guide

Linux

  1. Use the .woff2 file in a webpage via CSS @font-face and open the page in a browser.
  2. If file type detection is incorrect, ensure your desktop MIME database recognizes the extension via the shared MIME-info database used on Linux desktops.
Full Linux guide

iOS

  1. Open a webpage (locally hosted or remote) that references the .woff2 in CSS; iOS browsers will use it as a web font when supported by the browser.
Full iOS guide

Android

  1. Open a webpage that references the .woff2 file using CSS @font-face; the browser will load it as a web font when supported.
Full Android guide

Security notes

  • A .woff2 file is font data, not an executable, but it is still untrusted binary input to font parsers in browsers and other software; malformed fonts can trigger vulnerabilities in font handling code.
  • Serve .woff2 files with the correct registered media type (font/woff2) so browsers and intermediaries handle them as fonts rather than misclassifying the content.
  • Only use web fonts from trusted sources, because they will be downloaded and parsed automatically when users visit a page that references them via CSS.

If you did not expect this file

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Can't open this file?

These are the most common causes and fixes when .WOFF2 files fail to open.

Common reasons

  • The font doesn’t load in the browser
  • Double-clicking doesn’t “install” or preview the font
  • Linux desktop shows the wrong file type or icon

Fix steps

  1. Confirm your CSS @font-face rule points to the correct .woff2 URL and that the file is actually reachable (check the browser’s Network panel).
  2. Ensure your server sends the correct media type for .woff2: font/woff2.
  3. Verify the @font-face rule selects the expected weight/style so your page actually uses the loaded face.

OS-specific troubleshooting

What is a .WOFF2 file?

WOFF2 is a web font packaging format standardized by W3C that stores font data in a compressed form optimized for web delivery. It’s commonly served by websites and consumed by browsers through CSS font loading.

Background

WOFF2 (Web Open Font Format 2.0) is a W3C Recommendation for packaging font data for use on the Web, identified by the .woff2 extension. Compared with older web font formats, its primary goal is efficient web delivery through compression while keeping the font data self-contained for browser use.

In practice, .woff2 files are usually part of a website’s assets and are referenced from CSS using @font-face rules. When configured correctly, the browser downloads the .woff2 resource and uses it to render text with the specified font.

WOFF2 also has a standardized media type registered with IANA under the “font” top-level type, which helps servers and browsers identify the resource correctly when it is served over HTTP.

Common MIME types: font/woff2

Further reading

Authoritative resources for more details on the .WOFF2 format.

Common .WOFF2 issues

The font doesn’t load in the browser

Browsers typically use .woff2 through CSS @font-face. If the URL/path is wrong, the server serves the wrong content type, or the CSS rule is incorrect, the browser may fall back to a default font.

  1. Confirm your CSS @font-face rule points to the correct .woff2 URL and that the file is actually reachable (check the browser’s Network panel).
  2. Ensure your server sends the correct media type for .woff2: font/woff2.
  3. Verify the @font-face rule selects the expected weight/style so your page actually uses the loaded face.

Double-clicking doesn’t “install” or preview the font

.woff2 is primarily a web delivery format; many desktop font managers focus on traditional installable formats. A .woff2 file is usually meant to be referenced by a browser, not installed system-wide.

  1. Test the font by using it in a small HTML file with a CSS @font-face rule and open it in a browser.
  2. If you need a system-installed font, obtain a desktop font format from the font vendor (for example, the same font family in a format intended for OS installation).

Linux desktop shows the wrong file type or icon

Linux desktops commonly rely on the shared MIME-info database for filename globs (extensions) and MIME identification. If the database is outdated or missing an entry, .woff2 may not be recognized correctly.

  1. Update your distribution’s shared MIME-info database package so .woff2 is recognized.
  2. If you maintain a desktop environment or package, add/verify a glob association for .woff2 according to the shared-mime-info specification.

FAQ

What is the MIME type for .woff2?

The registered media type is font/woff2.

How do websites use a .woff2 file?

They reference it from CSS with an @font-face rule; the browser downloads the .woff2 resource and uses it to render text with that font.

Is .woff2 the same as .woff?

They are related web font formats; WOFF2 is defined by the W3C WOFF File Format 2.0 specification and is commonly used as a more efficient web delivery format than older options.

Should I try to install a .woff2 file as a system font?

Usually no—.woff2 is primarily intended for web use in browsers. If you need a system-installed font, obtain a version of the font intended for OS installation from the font provider.

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