Max length of Title Attribute

Question

What is the length limitation of HTML title attribute?

Answer 1

There is no limit in the specifications, but when you go past 48 characters, browsers will treat it differently—IE breaks the text to two or more lines, whereas Firefox doesn’t. Firefox doesn’t honor explicit line breaks in source (this is, debatably, correct behavior).

So the practical conclusion is: if you need to ask, it’s too long, and you should use some other technique. The title attribute is normally used for the “tooltip” effect, and similar effects can be created (with better usability) using CSS (and possibly JavaScript).