What end-to-end encryption on Messenger means and how it works

Some products don't currently support end-to-end encryption, such as community chats for Facebook groups, chats with business and professional accounts, Marketplace chats and others.
End-to-end encryption on Messenger adds extra security and protection to your messages and calls so only you and whoever you're talking to can see, hear or read them.
The content of your messages and calls in end-to-end encrypted conversations is protected from the moment it leaves your device to the moment it reaches the receiver's device.
This means that nobody else can see or listen to what's sent or said - not even Meta. We couldn't even if we wanted to.
How end-to-end encryption protects your conversation
Every device in an end-to-end encrypted conversation has a special key to protect the conversation. When you send a message in an end-to-end encrypted conversation, your device locks the message as it's sending. This message can only be unlocked by a device that has one of the keys for that conversation.
No one can access your messages or calls except the people with the keys. You and whoever you're talking to in end-to-end encrypted conversations are the only people with unique, matching keys.
You can check that your keys match to be sure your conversation is secure:
You can also look for lock, which appears on end-to-end encrypted chats or calls.
Web browsers and end-to-end encryption
When you send encrypted messages on the web, your messages are stored in the device's browser (example: Chrome). If you clear your browser cookies or browse in private mode:
  • Your browser may delete those messages from its storage.
  • You may no longer see those messages in the Messenger chat on that browser.
  • You may not see those messages if you use a different browser on the same device.
To view your end-to-end encrypted messages, log into your Messenger mobile app.
Note: In some cases, your messages may not be on your mobile device, such as a newly added device or a device that hasn't logged into Messenger in 30 days.
What happens when you report end-to-end encrypted chats
You can report end-to-end encrypted chats or messages on Messenger or Facebook chat that you think go against our Community Standards.
We'll be able to see and review up to 30 of the most recent messages in a conversation you choose to report and send to us from your device. You can also report messages you've set to disappear from an end-to-end encrypted chat within six hours after they're gone.
What to keep in mind about end-to-end encrypted conversations
  • You can't report video or audio calls on Messenger or Facebook chat.
  • If someone in the end-to-end encrypted conversation chooses to share the message with someone else, they'll be able to see or hear its contents.
  • When you use Play Together or Watch Together, no one outside the call can see or hear your audio and video. However, certain actions are communicated to third-party gaming servers for the game to work (example: playing a card in a game). Meta provides personalized recommendations based on game and video selections, and you can learn more in our Privacy Policy.
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