Can you? Sure. In this technological age, almost anyone can go online and fill out forms. Should you? Probably not.
An Analogy
If I have a cavity, am I capable of pulling out that tooth with pliers? Probably. Would I ever do it? Absolutely not. We live in an age where anyone can do anything online, but that doesn't mean it's a good idea.
Real-World Consequences
There was a recent case that worked its way to the Florida Supreme Court involving someone who did their own planning using online forms. It led to a disastrous result. The justice who wrote the opinion lambasted the use of do-it-yourself forms and technology, having clearly seen similar situations before.
Horror Stories Abound
There are countless horror stories where something seems simple and easy, but people don't seek professional guidance, leading to awful situations.
Bottom Line
You can do it yourself, but it's probably not wise to do so. Don't let common estate planning excuses lead you to inadequate planning.
Work with experienced professionals to ensure your estate plan is properly executed.