WWF may refer to:
- World Wide Fund for Nature, a nature conservation organization previously named World Wildlife Fund (and still using the former name in some markets)
- World Wrestling Federation, the name used from 1979 to 2002 by the professional wrestling company now known as WWE
- Welded wire fabric, a reinforcing material typically used in poured concrete slabs
- Working Women's Forum, an organisation in India
- World Water Forum, an international forum for water issues
- Windows Workflow Foundation, Microsoft's workflow management framework
- Wiscasset, Waterville and Farmington Railway, a former 2 foot gauge railroad in Maine, United States
- WWF (file format), a campaign to produce PDF electronic documents that forbid printing
- Words with Friends, a game for Apple and Android platforms
- Waterside Workers' Federation, a former Australian trade union, now the Maritime Union of Australia
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