Wt is a C++ library for developing Web applications with an API that is widget-centric and inspired by existing C++ graphical user interface APIs. To the developer, it offers abstraction of Web-specific implementation details, increasing the accessibility and portability. Under the hood, the library uses the latest techniques (HTML5, Ajax, WebSockets) to handle user events and update the Web page.

Operating Systems

Recent releases

  •  28 May 2014 10:36

    Release Notes: This is mostly a bugfix and maintenance release.

    •  12 Mar 2014 21:22

      Release Notes: Twitter Bootstrap 3.1 is now supported in addition to version 2. An option was added to WGLWidget to render server-side (using OpenGL) in an off-screen buffer, as a portable solution when WebGL is not available in the browser, or when scene complexity is so high that downloading the entire scene to a client is less efficient. A 3D Graphics Library was added to complement the existing 2D charting API. The wthttpd received several improvements from architectural changes, as well as performance improvements.

      •  16 Oct 2013 15:45

        Release Notes: This release has a focus on bugfixes and other cleanups after the big changes which went into 3.3.0. New functionality includes localized date-time support (WLocalDateTime), support for TinyMCE 4 in WTextEdit, support for boost.signals2 in the Signals implementation, a CSS stylesheet parser (and many other improvements) in the HTML-to-PDF renderer, attachment support in the SMTP mail client, and serialization support in the JSON module.

        •  08 Apr 2013 21:29

          Release Notes: Twitter Bootstrap was adopted as a new theme in addition to the existing CSS-based themes. As a result, several new widgets were added (toolbar, navigation bar, split button, and date edit) and improved (menus and popup menus). In addition, a MariaDB/MySQL backend for Wt::Dbo was added, performance was improved in the httpd/WebSockets backend, and the widget gallery has undergone a complete rework.

          •  29 Nov 2011 10:56

            Release Notes: Several new modules were added: authentication (with support for third party identity services using OAuth 2.0), an HTTP(S) client, an SMTP client, and a JSON library. WebSockets protocol support was expanded to include all protocol versions up to the latest draft. A Firebird backend was added for Wt::Dbo. There is a new logging infrastructure, live configuration file rereading, and new Denial-of-Service mitigation and other security measures.


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