If you think that after creating a website the job is done, you are wrong. You need to constantly monitor the availability and the accessibility because if you let it unattended, a little problem can ruin everything. You need to monitor if your website is online, how fast does it load, how it reacts on stress tests and so one. There are many online tools that are able to help you with these things but as we know, not all are efficient. Below you can see a list of 10 most important tools that will help you make sure your website is working ok.

Pingdom – get notified when your site is down

Pingdom has a very strong and narrow focus. That focus lies on covering the uptime monitoring needs of 90% of the companies in the world. Instead of branching out into other areas, we will instead place all our efforts into maintaining the best uptime monitoring service available.

Google web page tester

Page Speed Online analyzes the content of a web page, then generates suggestions to make that page faster. Reducing page load times can reduce bounce rates and increase conversion rates.

Dnscheck – check your website’s DNS

DNSCheck is a program that was designed to help people check, measure and hopefully also understand the workings of the Domain Name System, DNS. When a domain (aka zone) is submitted to DNSCheck it will investigate the domain’s general health by traversing the DNS from root (.) to the TLD (Top Level Domain, like .SE) to eventually the nameserver(s) that holds the information about the specified domain (like iis.se). Some other sanity checks, for example measuring host connectivity, validity of IP-addresses and control of DNSSEC signatures will also be performed.

DownForEveryoneOrJustMe.com

As the title says, this service will help you to see if there is something wrong with a site or is just a local problem.

webpagetest.org

Run a free website speed test from multiple locations around the globe using real browsers (IE and Chrome) and at real consumer connection speeds. You can run simple tests or perform advanced testing including multi-step transactions, video capture, content blocking and much more. Your results will provide rich diagnostic information including resource loading waterfall charts, Page Speed optimization checks and suggestions for improvements.

AChecker

This tool checks single HTML pages for conformance with accessibility standards to ensure the content can be accessed by everyone. See the Handbook link to the upper right for more about the Web Accessibility Checker.

EvalAccess

EvalAccess 2.0 is an on-line web accessibility evaluation tool which has been developed using Web Service technology. Due to its architecture it can be easily integrated into other applications such as authoring tools. This tool provides different methods for evaluating web accessibility: evaluation of a single web page, evaluation of a web site and evaluation of HTML mark-up. It returns a complete report of errors as a result of the evaluation.

Feed validator

This is the W3C Feed Validation Service, a free service that checks the syntax of Atom or RSS feeds.

Mxtoolbox – Check if your site is blacklisted

This test will check a mail server IP address against 117 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.

Load impact

Using this service you can load test your website and see how it responds on a increased number of connections.