HTML5 isn’t officially released yet, but many websites are already starting to take advantage of the platform. Here are 5 reasons why you might want to consider making the transition to HTML5 sooner rather than later.

1. Most of your visitors are already using modern browsers.

All the modern browsers – including Firefox, Chrome, Safari, IE9 and Opera – have support for HTML5. This means if your audience is generally up-to-date, you can take advantage of HTML5’s simplified execution of multimedia and other features to present a better user experience on your website.

2. You want to provide a richer mobile experience.

Mobile HTML5 is supported (at least partially) by most of the popular mobile browsers. Again, it depends upon the demographics of your mobile audience (and you can check out the Mobile HTML5 website to see which browsers support which features) but the ability to use the Canvas API is universal and allows for a variety of useful effects that you can use to provide a better mobile experience for your users.

3. You are moving away from Flash-based elements on your website

The features in HTML5 eliminate the need to use Flash for video, audio, special effects or any other features on your website. This results in cleaner code and a faster overall experience. In the transition phase, HTML5 can be a good fallback option for your users who do not have Flash enabled on their web browsers.

4. You are building a new website from the ground up.

Even though HTML5 isn’t 100% supported at this stage, building a new website from scratch typically means a longer development time. If you aren’t looking for a CMS-based solution for your site, developing in HTML5 now can save you time, money and effort versus making the switch later on down the line.

5.  You want to be one of the multimedia trendsetters.

YouTube and Scribd are just two popular websites that have already started transitioning to HTML5, and the differences are noticeable in not only page load times, but the amount of browser lag as well. Any website that deals in large amounts of multimedia could see similar benefits to making the switch.

Sound Off: What’s your favorite HTML5 feature?