This is a selection of best online tools for webmaster job you can use to check, improve and enhance your website for performance, accessibility, compatibility.
Useful feature is to check your website for broken links or list all outgoing links.
Before you move on to some more complex validation, you might want to clean, optimize and compress your CSS code. This simple and powerful tool will allow you to do just that, and in the process can fix errors. Just paste your CSS code into the box or type an url to your stylesheet, and in a moment you will be presented with a clean and optimized version of your CSS. This is a must before going to the next step. After processing CSS of this site I have manged to get rid of most of css errors and compress the code by about 25% resulting in faster loading times. Experienced web designers will probably write the proper code from beginning but for all of us others it's a really great helper.
This tool will check your CSS files for any errors. Different browsers interpret stylesheet code differently so even if your browser shows everything the way it should be, it does not mean that others will. So use this great tool to fix your CSS code before moving on.
This is the Big Daddy of validation tools and if you pass this one without any errors, you are pretty sure that you have a website that complies to everything in the universe. I will only tell you that google.com has 31 errors according to this test. I have used it to remove some simple errors. There are some pretty technical things that you will get in this report so you may need an experienced website developer to fix it all.
Next you will want to try this tool, that will present you with a validation report in a visual way, "drawing" things over your site display. This tool is also very detailed in the amount of information it gives about your website accessibility and errors. You should not focus on fixing every single bit as most of the information TAW gives is little "over the top".
If you thought the all work is done you are wrong. Remember the browser differences mentioned at the beginning? Well thanks to this tool, you will not have to install all the commonly used browsers to check your site in everyone. You only need to go to this site, type in your website URL and select all browsers that you are interested in. It supports Firefox 1.5 and 2.0, Microsoft Internet Explorer 5, 6, and 7, Opera, Safari and some others and all that on both Linux and Windows platforms. Best things is you get actual screenshot from an actual computer using that actual browser! Here are the screenshots of my website seen in different browsers:
Using this tool I have for example noticed that my site does not load properly in MS IE6. It is really convenient and easy to use. A truly fantastic tool.
With mobile phones and hand held devices being more and more popular, it is a growing trend (and a necessity) to make your website compatible with mobile phones. This usually means using as little advanced technologies as you can (java, flash etc.) and keeping the file sizes down as mobile bandwidth is still rather expensive. This site will give you a report of your website optimization for mobile devices.
10. Readability Test
All checks passed, you still are not finished if the content you write is understandable to you only. Using the readability test you can get a lexical grade for your content. There are three figures to check. Gunning Fog Index and Flesch-Kincaid Grade will show you roughly how many academic years are necessary to process and understand your content. You will typically want to have these indexes lower if you want a broader audience. Third one, Flesch Reading Ease, is scale from 1 to 100 with higher the grade the more understandable to text is. You want to have between 60 and 70 on this scale.
If you are a Firefox or Flock user, then Firebug extension will be priceless for your web development needs. It allows you to inspect and change your web site design in real-time. Complement that with YSlow extension which displays performance stats and you have a powerful webmaster tools built in right into your browser.