Adobe Dreamweaver is a web development application originally created by Macromedia and now owned

by Adobe Systems, which acquired Macromedia in 2005.

Dreamweaver is available for both Mac and Windows operating systems. Recent versions have

incorporated support for web technologies such as CSS, JavaScript, and various server-side

scripting languages and frameworks including ASP.NET, ColdFusion, JavaServer Pages, and PHP.

As a WYSIWYG Presto-based editor, Dreamweaver can hide the details of pages' HTML code from the

user, making it possible for non-coders to create web pages and sites. A professional criticism of

this approach is that it produces HTML pages whose file size and amount of HTML code is much larger

than they should be, which can cause web browsers to perform poorly. This can be particularly true

because the application makes it very easy to create table-based layouts. In addition, some web

site developers have criticized Dreamweaver in the past for producing code that often does not

comply with W3C standards, though this has improved considerably in recent versions. Dreamweaver

8.0 (the version prior to the recently released 9.0 within CS3) performed poorly on the Acid2 Test,

developed by the Web Standards Project. However, Macromedia has increased the support for CSS and

other ways to lay out a page without tables in later versions of the application, with the ability

to convert tables to layers and vice versa. Dreamweaver allows users to preview websites in many

browsers, provided that they are installed on their computer. It also has some site management

tools, such as the ability to find and replace lines of text or code by whatever parameters

specified across the entire site, and a templatization feature for creating multiple pages with

similar structures. The behaviors panel also enables use of basic JavaScript without any coding

knowledge.

Dreamweaver can use "Extensions" - small programs, which any web developer can write (usually in

HTML and JavaScript). Extensions provide added functionality to the software for whoever wants to

download and install them. Dreamweaver is supported by a large community of extension developers

who make extensions available (both commercial and free) for most web development tasks from simple

rollover effects to full-featured shopping carts.

Like other HTML editors, Dreamweaver edits files locally, then uploads all edited files to the

remote web server using FTP, SFTP, or WebDAV.