How do people validate their websites in 2013? [closed]

Question

There are several options for validating websites available:

• Paste each URL into an online validator (http://validator.w3.org)
• Run a module on your web server (mod_tidy, "Although mod_tidy makes the impression of being a validator, it isn't one")
• Install a browser extension (Chrome HTML Validator)
• Paste HTML source into a validator (http://validator.w3.org)
• Run a proxy (Charles Proxy)

But none of them has the ultimate feature set:

• Intercept all requests, even subsequent to page load (HTML, CSS, JS, AJAX, JSON, XML)
• Do all processing locally without loading validator.w3c.org or similar
• Process automatically without requiring to "submit" each resource for validation
• Be actively developed (works with HTML5)

Are real people out there using any good tools to make this easier, or is validation moot until IE is eradicated?

Answer 1

In general, I just use a small conditional statement for IE, and have no stylesheet for older versions of internet explorer(if they are still stuck in the stone age of ie5-7, they don't need the new technologies of CSS). Apart from that, I use w3c validator and jstidy. Maybe I am just out of date, but in general, HTML is a very flexible language, and it is really not that big of a deal if it is 'XHTML or HTML compliant, as long as it works as you want it to.