Mastros — WhatsApp Members, Chats, Contacts Download

About

Export WhatsApp Web members, messages, and recent contacts from chats you can access. CSV, JSON, JSONL. Client-side.

Scrape and export structured data from WhatsApp Web, including group members, loaded chat messages, and recent contacts from conversations and groups you already have access to. Turn WhatsApp Web data into clean CSV, JSON, or JSONL files directly from your browser.

🧩 THREE SCRAPING MODES

👥 Group Members Scraper
Scrape visible member lists from WhatsApp groups you belong to. Open a group, run the scraper, and export member names, phone numbers when visible, group role when shown, source group, and extraction timestamp.

Built for community managers, recruiters, event organizers, sales teams, and operators who need to organize WhatsApp group members into a spreadsheet.

💬 Current Chat Messages Scraper
Scrape loaded message history from the currently open WhatsApp chat or group. Export visible message text, sender name when shown, timestamps when visible, incoming/outgoing direction, forwarded indicators, reply indicators, and source chat.

Mastros exports messages that are already loaded in WhatsApp Web, making it useful for organizing visible conversations, archiving work chats, preparing structured records, and moving WhatsApp conversation data into spreadsheets or internal tools.

📇 Recent Contacts Scraper
Scrape recent contacts and chats from your WhatsApp Web chat list. Export visible contact or group names, last message previews, timestamps, unread counts, pinned or muted indicators, chat type guesses, phone numbers when visible, and extraction timestamp.

Use this mode to turn your WhatsApp chat list into a clean contact or CRM-style export.

👥 WHO IS THIS FOR?

Sales teams organizing WhatsApp conversations and prospect chats
Recruiters managing candidate conversations and hiring groups
Real estate agents exporting buyer and seller conversations
Local businesses cleaning up customer chats and contact lists
Community managers auditing WhatsApp group members
Event organizers managing group participants
Researchers collecting visible conversation data
Anyone who uses WhatsApp as an informal CRM and needs structured exports

💳 PLANS

Free: 100 profiles and 100 messages per month. Every scraper unlocked. No account needed. The only limit is monthly volume.

Pro: 5,000 profiles and 10,000 messages per month. Everything in Free at higher volume. Best for active operators.

Scale: 100,000 profiles and 500,000 messages per month. Everything in Free at the highest volume. Built for high-volume export workflows.

Group members and recent contacts count as profiles. Chat messages count as messages. Usage resets monthly. Billing is handled securely by Stripe. Switch plans or cancel anytime.

⚙️ WEB MODE ONLY

Mastros reads directly from the WhatsApp Web interface. No setup needed. No API credentials. No external account connection beyond the user already being logged into WhatsApp Web.

Everything happens client-side by reading data already visible or loaded in WhatsApp Web.

📦 EXPORT YOUR WAY

CSV: open in Excel, Google Sheets, Airtable, or any spreadsheet tool
JSON: structured data ready for databases, CRMs, and pipelines
JSONL: line-delimited JSON, ideal for larger exports and data workflows

Each scrape runs as a session. Review, download, or clear sessions individually from the Export tab. Partial results are saved automatically if a run hits a limit, stops, or errors midway, so you never lose progress.

🚀 ZERO FRICTION FREE TIER

✓ No account creation required, works in guest mode
✓ No email address needed to start
✓ No credit card, trial period, or expiration
✓ 100 profiles and 100 messages every month
✓ Every scraper unlocked
✓ Upgrade only when your monthly volume demands it

Install. Open WhatsApp Web. Scrape. Export. That is it.

🔒 PRIVACY FIRST ARCHITECTURE

✓ All scraping happens client-side in your browser
✓ Your WhatsApp data is never uploaded to our servers
✓ No tracking of your conversations
✓ No message text, phone numbers, names, chat titles, or group titles sent to analytics
✓ No background WhatsApp scraping
✓ Human-paced scraping from visible WhatsApp Web data
✓ Manifest V3 compliant, using the latest Chrome extension security standard
✓ Not affiliated with WhatsApp or Meta

⚠️ IMPORTANT LIMITATIONS

Mastros only exports data that is visible or loaded in WhatsApp Web.

Phone numbers are only exported when WhatsApp Web itself displays them. Data availability depends on what WhatsApp Web renders in the browser.

WhatsApp Web may change its interface over time. Mastros is designed to use resilient selectors and human-paced scraping, but visible data availability always depends on the current WhatsApp Web interface.

✨ WHAT'S INCLUDED

Group Members Scraper: export visible members from groups you belong to
Current Chat Messages Scraper: export loaded messages from the open chat
Recent Contacts Scraper: export recent chats and contact-style rows from your chat list
CSV, JSON, and JSONL exports
Session-based export history
Partial result preservation
Client-side operation
Guest mode with free monthly usage
Stripe billing for Pro and Scale plans

🛠️ GETTING STARTED

Install the extension and open WhatsApp Web at web.whatsapp.com
The Mastros sidebar appears on the right
Pick a scraping mode
Open the relevant chat, group, or chat list
Hit Start and watch the live progress feed
Download scraped data from the Export tab

📩 SUPPORT

Questions or issues? Reach us at [[email protected]](mailto:[email protected])
Privacy policy: mastros.online/privacy
Terms of service: mastros.online/terms

Mastros — WhatsApp Contacts, Group Members & Chat Exporter is not affiliated with, endorsed by, sponsored by, or connected to WhatsApp, WhatsApp LLC, Meta Platforms, Inc., or Meta Platforms products. You are responsible for using this extension in compliance with WhatsApp’s Terms, applicable privacy laws, and the rights of other users.