Your message is encrypted in your browser and passed directly between connected browsers. The registry coordinates connections and availability; it does not receive the message or its decryption key.
The full link is the key.
Anyone with the complete link can read while a holder is reachable. Share it with care. The key stays in the link fragment, outside the network request for the page.
Open tabs keep it available.
By default, the creator's original tab must stay connected. Closing it, reloading, or going offline can end the message. The carried-message mode lasts while at least one connected holder remains. The creator can end either message mode from the original session. Groups have no creator-only End control: the final participant leaving ends the room.
One tab per browser profile.
Only one tab in this browser profile can hold a room. A random signing seed saved locally produces a different identity for each room, without device details. Simple messages carry a verified sender ID inside their encrypted package. Group aliases and signatures also travel only between peers. Sharing a cross-room proof is optional. Other browsers and private windows are separate unless you restore an encrypted identity backup. Clearing site storage loses the identity without a backup; restoring never recovers old messages or creator control.
Peers carry the available history.
New group participants receive messages still held by connected peers: up to 200 messages and 512 KiB of text. History stays in memory and is cleared when a tab leaves or loses its required connection. There is no server archive. Attachments transfer directly between peers. Files are received on request in messages and groups. Participants share verified pieces while connected; every piece must remain held somewhere for a complete download. Received pieces use independent encrypted temporary storage for each room, capped at 5 GB per room subject to available browser storage. They are removed when you leave, cancel, or lose your session. Cache keys stay only in memory. After a browser crash, leftover encrypted files are removed on your next visit. Saved downloads remain yours.
Public activity shows totals.
The registry counts newly created message links and groups, and estimates active peer connections. Public stats contain no room IDs, names, message contents, IP addresses, or signing identities. One person can count as multiple peers.
Ending cannot erase a saved copy.
Ending asks cooperating tabs to clear the message. Recipients can still copy, save, photograph, or modify their client to keep it.
This does not make you anonymous.
Connection services and other browsers may see your IP address. Browser code can access the decrypted message, so privacy also depends on trusting the code delivered by this site and your device.