Mastros — WhatsApp Scraper icon
Mastros — WhatsApp Scraper icon

Mastros — WhatsApp Scraper

Mastros is a WhatsApp Web export Chrome extension that saves group members, loaded messages, and recent contacts into structured CSV, JSON, and JSONL files.

Export WhatsApp Web members, messages, and contacts to spreadsheets.

Cost / License

  • Freemium (Subscription)
  • Proprietary

Platforms

  • Google Chrome
Three export modes: group members, chat messages, and recent contacts.
Clean CSV, JSON, or JSONL output, ready for Excel or Google Sheets.
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Runs entirely in your browser with local processing.
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Features

Properties

  1.  Privacy focused
  2.  Lightweight

Features

  1.  No Coding Required
  2.  Ad-free
  3.  Data export/import

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Mastros — WhatsApp Scraper was added to AlternativeTo by Mastro on and this page was last updated .
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What is Mastros — WhatsApp Scraper?

Mastros — WhatsApp Scraper is a Chrome extension for turning WhatsApp Web chats, contacts, and groups into structured files.

It runs inside WhatsApp Web and exports the data you already have access to. There are three scrapers: Group Members (names, phone numbers when shown, and roles from an open group), Chat Messages (the loaded message history of the open chat plus its contact card), and Recent Contacts (names, previews, times, and numbers from your chat list). Download everything as CSV, JSON, or JSONL and open it in Excel, Google Sheets, or your own tools.

Everything runs client-side in your browser. Message text, phone numbers, names, and chat titles are never uploaded to Mastros servers. It is Web Mode only, with no API and no automation of any kind (no sending, auto-replies, broadcasting, joining groups, or inviting contacts). It reads only what WhatsApp Web has already rendered, so there is no deleted-message recovery and hidden numbers are never revealed.

Useful for research, analysis, community management, record keeping, and moving WhatsApp data into a spreadsheet or CRM. A free tier is available with no signup. Not affiliated with WhatsApp or Meta.