This test will check a mail server IP address against 147 DNS based email blacklists. (Commonly called Realtime blacklist, DNSBL or RBL). If your mail server has been blacklisted, some email you send may not be delivered. Email blacklists are a common way of reducing spam.
RED is a robot that checks HTTP resources to see how they'll behave, pointing out common problems and suggesting improvements. Although it is not a HTTP conformance tester, it can find a number of HTTP-related issues.
Instructions: paste or compose a document below. Click Check Writing to get feedback on your writing. Click an underlined spelling error, grammar suggestion, or style suggestion to see more options.
It is a tool for checking foreground and background color combinations of all DOM elements and determining if they provide sufficient contrast when viewed by someone having color deficits.
Using this method images, style-sheets and javascript pages can also be checked to ensure they are correctly loaded. This builds up a useful overview of how your web-site pages link together and where problems lie. Creating a visual representation of this information not only allows quick resolutions of the issues found, but also gives a method to check to overall information architecture of a site.
This color laboratory allows you to select colors and see how they appear next to one another, and in various foreground/background combinations. It also allows you to see those colors as they might appear to color-blind users.
Did you ever wonder what you were really sharing with non-friends through Facebook? Click the Login button below to find out and get your online privacy score:
WebDigr provides free information to webmasters about their websites and competitors'. It collects website information and statistics, analyze them and translates into several simple and measurable metrics. WebDigr uses more than 10 different sources for its website data input. The numbers you see on WebDigr are estimate results and based on both widely accepted calculation methods and WebDigr own unique calculation methodology."
Search for copies of your page on the web.
Copyscape is dedicated to protecting your valuable content online. We provide the world's most powerful and most popular online plagiarism detection solutions, ranked #1 by independent tests. Copyscape's products are trusted by millions of website owners worldwide to check the originality of their new content, prevent duplicate content, and search for copies of existing content online.