WhatsApp’s multi‑device feature lets you use WhatsApp Web and other non‑phone devices even when your phone is offline, supporting links to up to four companion devices while keeping chats end‑to‑end encrypted.
How it works
WhatsApp’s multi‑device architecture links your primary phone account to companion devices using a secure pairing process so each linked device holds its own encrypted session that syncs messages independently of the phone.
Phone offline capability
With the multi‑device feature enabled, browser sessions and other linked devices can remain active and exchange messages even when the primary phone is turned off or out of range because messages are synchronised across the paired devices rather than relayed only through the phone.
Device limits and setup
WhatsApp currently permits linking up to four companion devices in addition to the main phone. Setup involves scanning a QR code in the browser or app and confirming the new device from your mobile WhatsApp settings under Linked Devices.
Security and restrictions
Linked devices use end‑to‑end encryption and appear in your mobile app’s linked devices list so you can review and revoke access. Some features remain tied to the primary phone and a prolonged inactivity of the main device can affect linked sessions in certain cases.
Practical tips
Only link trusted computers, regularly check the linked devices screen to remove unknown sessions, log out of shared machines, and keep your apps updated to benefit from the latest multi‑device security and functionality improvements.