|Developer(s)||Nick Bradbury, Stefan van As|
|Stable release||184.108.40.206 / July 2014|
|Written in||Embarcadero Delphi|
|Operating system||Windows 98, ME, NT4, 2000, XP, Vista, 7|
TopStyle is a CSS/XHTML/HTML editor for Microsoft Windows developed by Nick Bradbury and now maintained by Stefan van As. The editor is code-centric rather than WYSIWYG, with integrated support for previews using either the Mozilla Gecko, Internet Explorer Trident, or Apple Inc. Webkit layout engines. The software is available as a commercial version with a trial period. It was announced on October 9th, 2015, that Stefan van As was ending development and support of TopStyle. 
TopStyle was created by Nick Bradbury. He also created Macromedia HomeSite (then just "HomeSite") in 1995. HomeSite was acquired by Allaire in March 1997, by Macromedia in 2001, and finally (as of 2006) by Adobe Systems. Nick Bradbury left the company to found Bradbury Software in 2003 and created the editor TopStyle and a news aggregator titled FeedDemon. Bradbury Software was acquired by NewsGator Technologies in May 2005. Stefan van As has acquired TopStyle in December 2008.
TopStyle supports HTML, XHTML, and CSS editing in various revisions, along with powerful checking for standards and browser compatibility issues. Checking optionally covers a variety of levels, such as a strict W3C CSS specifications, to issues on a wide variety of browsers. This style checker feature not only provides detailed warning messages but enables the user to visually see if parts of HTML or CSS code would be incompatible with a particular browser.
The software additionally supports converting deprecated HTML styling to CSS code, converting HTML code to valid XHTML, and checking for orphaned code or pages.
TopStyle integrates with HTML Tidy and W3C's validation services.
TopStyle also integrates with Adobe Dreamweaver.
TopStyle 3.5 was released on October 15, 2007 (version 220.127.116.11). New features include better support for Windows Vista and browsers released since TopStyle 3.12 (Safari 2, IE7, Firefox 2, Opera 9), Box Spy (tool that shows padding/margins of boxes in the preview window), and many more including a large number of bug fixes and improvements.
TopStyle 4 was released on May 31, 2009. New features include (UTF-8) unicode support, live FTP editing, support for browsers released since TopStyle 3.5 (IE8, Firefox 3, Safari 3, and Safari 4), Script Insight for ASP + PHP + ColdFusion, support for iPhone (and iPod touch) webapp development, support for HTML 5, IE8 document compatibility, and many more including a large number of bug fixes and improvements.
TopStyle 5 was released in November 30, 2012, including support for CSS3.
- TopStyle development and support ending
- About Nick Bradbury
- ANN: TopStyle Acquired by Stefan van As
- CSE HTML Validator and TopStyle 4 Integration Retrieved on 2009-07-22.