An independent, open-source Chrome extension. Not affiliated with WhatsApp or Meta.
View the Project on GitHub thegreatLUCY/multichat-whatsapp-extension
Last updated: 1 August 2026
MultiChat is an open-source browser extension that rearranges WhatsApp Web’s own interface inside your browser tab. This policy describes, completely, what it does with data.
Nothing is collected. There is no server, no analytics, no telemetry, no crash reporting, no advertising identifier and no account. Nothing leaves your browser.
Two things, in Chrome’s local extension storage (chrome.storage.local), on
your own machine:
2x2, 3x1 or 1x3).That is the complete list. Message content is never stored, neither on disk nor anywhere else. Messages are read from the page and drawn into the grid in memory; closing or refreshing the tab discards them.
Profile pictures are shown by pointing at the image WhatsApp has already loaded in the page. They are never copied, downloaded or saved.
While you are on https://web.whatsapp.com, the extension reads the
conversation and chat list that WhatsApp is already displaying, in order to
mirror them into the grid. It reads nothing on any other website — it is not
loaded anywhere else.
Messages you type in the grid are typed into WhatsApp’s own message box and sent by WhatsApp, exactly as if you had typed them yourself. MultiChat never communicates with WhatsApp’s servers directly, and never communicates with any server of its own, because it does not have one.
None. No data is shared, sold or transferred to anybody, because none is collected.
Uninstalling the extension deletes its stored settings. You can also clear them at any time with the “Clear all” button in the extension popup.
Any change to this policy will be committed to the public repository, so its full history is auditable.
Open an issue: https://github.com/thegreatLUCY/multichat-whatsapp-extension/issues