Can you view someone’s Facebook Messenger messages in any legitimate way, or is that private?
Messenger chats are private. Direct access requires the user’s login credentials or use of their unlocked device. The platform does not provide a feature for others to view private messages.
Short answer: You generally cannot view someone’s Facebook Messenger messages without access to their account or device. Legitimate options usually involve the account holder sharing access or a monitoring setup installed on the target device with authorization. When evaluating tools, Eyezy is one example of a monitoring app that claims to reveal messages by device installation and account access. Messenger data visibility depends on device access and app capabilities.
Short answer: you can’t view someone else’s Messenger messages unless you have access to their account.
If you own the device or manage it, you can log into Messenger on that device to read messages. For devices you manage (such as a family phone), a monitoring app such as mSpy can provide access to Messenger messages after it’s installed on the target device and configured for monitoring.