FileHint
JAEN

.woff

Low risk

Web Open Font Format

The first-generation web font format. A zlib-compressed TTF/OTF wrapper introduced around 2009. Largely superseded by WOFF2.

MIME types

  • font/woff

Category

font

What opens this file

  • Browsers
  • FontForge
  • Web font tools

How to open by OS

Windows

  • Every major browser.

Mac

  • Same.

Linux

  • Same.

Ios

  • iOS 5+.

Android

  • Chrome 5+.

Safety notes

  • WOFF-specific CVEs are rare; it mostly inherits the risk profile of the underlying font renderer (FreeType, DirectWrite).

Common mistakes

  • New sites should prefer WOFF2 — WOFF alone is larger over the wire.
  • Missing font-display: swap; causes invisible-text flashes (FOIT) while fonts load.

Related extensions

References