Am I a convicted felon if adjudication was withheld?

Generally not, for Florida purposes. A withhold is not a conviction under Florida law, which is why it preserves sealing eligibility and avoids certain consequences.

But the answer isn't uniform.

Firearms. Florida's prohibition on possession by convicted felons has been read to reach some withheld dispositions, and federal law applies its own definition. Do not assume a withhold restores firearm eligibility — this is a question to get answered specifically rather than inferred.

Immigration. Federal immigration law defines conviction to include dispositions where guilt was admitted and any penalty imposed. A withhold frequently counts as a conviction for immigration purposes even though it doesn't in Florida.

Employment and licensing. Many applications ask about arrests, charges, or pleas rather than convictions. A truthful answer may require disclosure regardless.

Later cases. A withhold can affect scoresheet calculations and enhancement eligibility in a subsequent case.

So the accurate answer is that it's not a conviction in Florida, and it may function as one elsewhere.