No, a confession alone is not enough for a conviction. There needs to be corroborating evidence in order to prove guilt to avoid false convictions. 

According to the Corpus Delicti Rule independent evidence must be present to indicate that a crime has occurred. Therefore, a confession alone is insufficient and cannot be the sole basis for a conviction. This rule was established to prevent wrongful convictions due to false confessions. False confessions occur due to mental illness, lack of understanding, protecting someone, coercion, and fear of harsh punishment.

Honorable Samuel A. Thumma and Roger E. Brodman, On “Vague Latin Phrases” and Criminal Confessions: Corpus Delicti, Trustworthiness and Corroboration, and the Federal Rules of Evidence, 114 J. CRIM. L. & CRIMINOLOGY 105 (2024).