Mastro

WhatsApp scraper that saves group members, contacts and messages as Excel, CSV or JSON. It only reads, it runs in your browser, and it never sends messages.

Save LinkedIn and Sales Navigator searches as CSV, JSON or JSONL — profiles, companies, jobs, posts, leads and accounts. It only reads, it runs in your browser, and it never guesses emails.

Mastros is a Chrome extension for exporting Telegram Web data into structured files. Export messages, group members, contacts, mutual groups, and media from conversations you can already access. Download clean CSV, JSON, JSONL, and ZIP files for research, archiving, community management, analysis, and personal data organization.