Committed to

I'm committed to creating our company's web site.

I'm dedicationg myself to creating our company's web site.

Are my sentences correct and natural to say?

Thanks
LiJ

Thanks, Avangi. I get the difference.

In a business context if you've been dedicated to a project, it means you will do it full time. But you don't "dedicate yourself" with that meaning. The prior interpretation of "I'm going to dedicate myself to..." does sound like it's your new raison d'etre.

Hi LiJ, I'm still tryin'   - 

If you're speaking of a personal committment / dedication, yes, it's fine to treat them as equivalent.

As GG pointed out, the other meaning would be if your company assigned you to work only / solely / full-time on that project, your time would be "dedicated" to that project in a sense that "committed" would not accurately describe.  Still, on the other hand, if it were a "committment" and your friend asked you to help him out with a different project, you might reply, "Sorry, my friend, I'm committed to finishing this project of mine by the end of the week, and I just won't have time for anything else."  This could refer to a promise to yourself or a promise to your employer.

Kind regards,  - A.