Web Development
Tools for web developers
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Down for Everyone or Just Me

When visiting a a web site produces a 404 or another message, check if it's that site that isn't working (down for everyone) or if it's your Internet service provider (just you). -
DomainTools Whois

Find out about a domain, including who owns it and their contact information, what server software it runs, usage ranking among many other useful information bits -
HTML Code Preview'r

