Are there any simple tool to use for finding unclosed tags? Like a missing , wrong spelled , /div> and so on? W3C distributing some offline installations but I'm not using Apache and any kind of GNU systems for my development. 
Validate DOM tree / find unclosed tags offline
html;web development
The HTML Tidy tool attempts to fix missing or mismatched tags, badly nested tags, and more. The 'offline' version is available here. Online versions are available from Infohound and the W3C.