The FBI has issued a warning about the hidden dangers of free online file converters, suggesting that these seemingly harmless tools may actually contain malware. While users often rely on them for file format conversions, the FBI indicates that some converters can compromise sensitive data, such as social security numbers and banking information. This malware can lead to identity theft and financial fraud, with ransomware being a significant threat. To protect against these risks, users are advised to only utilize trusted sources, maintain updated security software, and refrain from engaging with unknown links. Immediate action is recommended if malware is suspected.