WebDAV, an abbreviation that stands for Web-based Distributed Authoring and Versioning, refers to the set of extensions to the Hypertext Transfer Protocol (HTTP) which allows users to collaboratively edit and manage files on remote World Wide Web servers.

The group of developers responsible for these extensions was also known by the same name and was a working group of the Internet Engineering Task Force (IETF).

The protocol's aim was to make the Web a readable and writable medium, in line with Tim Berners-Lee's original vision.

It provides functionality to create, change and move documents on a remote server (typically a web server or "web share").

This is useful for, among other things, authoring the documents which a web server serves, but can also be used for general web-based file storage that can be accessed from anywhere.

Important features in WebDAV protocol include locking (overwrite prevention), properties (creation, removal, and querying of information about author, modified date, etc.), name space management (ability to copy and move Web pages within a server's namespace) and collections (creation, removal, and listing of resources).

Most modern operating systems provide built-in support for WebDAV.

With the right client and a fast network, it can be almost as easy to use files on a WebDAV server as those stored in local directories.

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