How to export WhatsApp Web group members and chats to CSV without the API

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WhatsApp offers no built-in option to export group member lists or contacts in a structured format, leaving community managers and recruiters with limited tools. The platform's native chat export produces only a plain-text file for a single conversation, which requires manual parsing to convert into a usable table. A practical workaround involves using browser extensions that read data already rendered in WhatsApp Web's interface, keeping all processing on the user's device. One such Chrome extension, Mastros, allows users to export group members, chat messages, and recent contacts into CSV, JSON, or JSONL formats via a client-side sidebar. Experts caution that any tool claiming to extract hidden phone numbers, deleted messages, or data from groups the user has not joined is either misleading or risks getting the account banned.

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