Missed the group chat? Get only the parts that need you.

Drop in a WhatsApp chat export. Rejoin finds what was asked of you, what was decided, and what's due, and shows the exact message behind each one. No scrolling back through hundreds of messages.

While you were out

Your name in the chat

Exactly as it shows in WhatsApp. Add nicknames after a comma.

Chat export

A .txt file, or a .zip if you exported with media (voice notes get transcribed).

How do I export a WhatsApp chat?

Open the group in WhatsApp.
Android: tap ⋮ → More → Export chat. iPhone: tap the group name → Export chat.
Pick Include media if you want voice notes turned into text, otherwise Without media.
Save it to Files or e-mail it to yourself, then choose it here.

Catch me up on Since I last sent a message Last 24 hours Last 3 days Last 7 days The whole chat

Read it with AI, with every item checked against its source (when you run Rejoin yourself with an API key) Offline rules, nothing leaves this computer

On this site your chat is read inside your browser. Nothing is uploaded. Phone numbers and e-mails are masked before anything is read.

Missed the group chat? Get only the parts that need you.

While you were out

Asked of you

Waiting for your answer

Decided while you were away

Dates

A message to rejoin with

Missed the group chat? Get only the parts that need you.

While you were out

Your catch-up

Asked of you

Waiting for your answer

Decided while you were away

Dates

A message to rejoin with