Fluid is a WebKit2-based site-specific browser (SSB) for Mac OS X created by Todd Ditchendorf.

[2][3] Its original WebKit-based version was compared to Mozilla Prism and mentioned in Lifehacker,[4] TechCrunch,[5][6][7] 43 Folders,[8] the 37 Signals blog,[9] and on InfoWorld[10] as a way to make web applications more like native desktop applications.

On July 4, 2011, version 1.2 was released and featured compatibility with Mac OS X 10.7 Lion.

In July 2018, Fluid underwent another rewrite[13] to take advantage of Apple's newer WebKit2 API with process separation,[14] with the same licensing terms as 1.x versions.

This Classic Mac OS and/or macOS software–related article is a stub.