How do I open a .woff file?

On Windows use Any web browser (via a web page); on macOS use Any web browser (via a web page); on Linux use Any web browser (via a web page). A compressed font wrapper made for downloading into web pages.

Can I convert a .woff file?

Yes. It is usually converted to .ttf, .otf or .woff2, either by exporting from one of the programs listed above or with a format converter.

.woff files

.woff file

Web Open Font Format

A compressed font wrapper made for downloading into web pages.

What opens a .woff file

Windows: Any web browser (via a web page), FontForge (to convert)
macOS: Any web browser (via a web page), FontForge (to convert)
Linux: Any web browser (via a web page), FontForge (to convert)
In a browser: Wakamai Fondue, CloudConvert

What a .woff file is

WOFF is a W3C format that wraps a TrueType or OpenType font with compression and metadata so it downloads quickly as a web font. It is not meant to be installed as a system font — Windows and macOS font installers reject it — so to use one on your desktop you convert it back to TTF or OTF first. FontForge and browser-based converters both do this.

Converting it

A .woff file is commonly converted to .ttf, .otf or .woff2. It is a binary format, so a text editor will show unreadable characters rather than its contents.

Details

Extension: .woff
Full name: Web Open Font Format
Category: Fonts
MIME type: font/woff
Created by: W3C
Format: Binary

Common questions

How do I open a .woff file?: On Windows use Any web browser (via a web page); on macOS use Any web browser (via a web page); on Linux use Any web browser (via a web page). A compressed font wrapper made for downloading into web pages.
What is a .woff file?: Web Open Font Format. WOFF is a W3C format that wraps a TrueType or OpenType font with compression and metadata so it downloads quickly as a web font. It is not meant to be installed as a system font — Windows and macOS font installers reject it — so to use one on your desktop you convert it back to TTF or OTF first.
Can I convert a .woff file?: Yes. It is usually converted to .ttf, .otf or .woff2, either by exporting from one of the programs listed above or with a format converter.

.ttf — TrueType Font The font format Apple and Microsoft built in 1991 — double-click to install.
.otf — OpenType Font The modern font format, with support for ligatures, alternates and huge characte
.woff2 — Web Open Font Format 2 The current web font format, roughly 30% smaller than WOFF.

Sources

Media Types Registry — IANA
Official vendor product documentation — At One Place

How these figures are compiled and checked