chrome , firefox.. these are great browsers , and even if i write utter crappy html code, it still makes sense out of it , and tries to display it the way a proper code would have made it display.

thats great stuff unless i want to know/see the errors when i make them.

any such place i can do that ?

Use an editor that syntax highlights to help you catch yourself.

go to w3school there you can find the best way to test the code...