number validator

Check HTML, CSS, SEO, PHP, JavaScript, accessibility, or links.

Find invalid email addresses without actually sending an email.

check, validate and limit your data entry according to your own preferences

A powerful site management and link checker tool for webmasters.

This is a script for ruby.

check email addresses from email lists, determine if the emails are valid.

check email address from a mailing list and determine if the emails are valid.

Check EDI X12 and EDIFACT for errors before its too late

Add powerful and comprehensive e-mail address validation to your .NET apps

Powerful tool for checking mailing lists for invalid/non-existent addresses