Clearly, you can write whatever you want in the textarea of any web form—the notes field of pizza hut's web delivery app, just as an absurd exampe—except that no one (or very few people) will ever read it. So, I'm assuming that free speech on the internet implies a broadcast model in your view.
Different jurisdictions have different definitions of free speech. Some jurisdictions have a right to free speech by certain standards, others do not. If your definition of free speech is a protected mechanism allowing you to say literally anything you want to say, with the expectation that literally everyone who wants to can hear it, then the answer is no.
In practice, you can shoot your mouth off about pretty much anything and have a very large audience—larger than, say, Thomas Paine did. That's provably easy to do on the internet today.
Different jurisdictions have different definitions of free speech. Some jurisdictions have a right to free speech by certain standards, others do not. If your definition of free speech is a protected mechanism allowing you to say literally anything you want to say, with the expectation that literally everyone who wants to can hear it, then the answer is no.
In practice, you can shoot your mouth off about pretty much anything and have a very large audience—larger than, say, Thomas Paine did. That's provably easy to do on the internet today.