Mastrosonline — Telegram

Scrape and export structured data from Telegram Web — group members, chat messages, contacts, and mutual groups — from conversations you already have access to. Download clean CSV, JSON, or JSONL files in seconds.

Try it free — no account, no email, no credit card. Install, open Telegram Web, and run your first extraction in under 60 seconds. The Free plan gives you 500 profiles and 1,000 messages every month, with full access to the Group Members and Mutual Groups scrapers. No trial countdown, no feature walls on core functionality. If it works for your workflow, upgrade when you're ready.

★ WHO IS THIS FOR?

→ Growth & marketing teams who need to scrape Telegram groups for outreach lists
→ Researchers collecting public conversation data for analysis
→ Community managers auditing member overlap across groups
→ Sales teams scraping prospect contacts from Telegram channels
→ Anyone who needs Telegram data in a spreadsheet

★ FOUR SCRAPING MODES

➊ Group Members Scraper
Scrape complete member lists from groups and channels you belong to. Select from your group list, paste @handles or t.me links, or target the currently open chat. Deduplication across multiple groups built in.

➋ Chat Messages Scraper
Scrape message history from any open conversation — text, sender info, timestamps, reply chains, and forwarded messages. Configure how many messages to collect (up to 100K).

➌ Recent Contacts Scraper
Scrape profile data from your most recent conversations. Set how many chats to scan, filter out bots and pinned chats automatically.

➍ Mutual Groups Scraper
Enter a @username to discover shared groups, then scrape member data from those groups in one flow.

★ TWO ENGINES

Web Mode — reads directly from the Telegram Web interface. No setup needed. Works instantly for scraping Chat Messages and Recent Contacts.

Power Mode — connects to the Telegram MTProto API for faster, deeper, and more complete scraping. Required for the Group Members and Mutual Groups scrapers. Available on Free tier for these two modes; unlock Power Mode across all scrapers with a paid plan.

★ EXPORT YOUR WAY

• CSV — open in Excel, Google Sheets, or any spreadsheet tool
• JSON — structured data ready for databases and pipelines
• JSONL — line-delimited JSON, ideal for streaming and large datasets

Each scrape runs as a session. Review, download, or clear sessions individually from the Export tab.

★ ZERO-FRICTION FREE TIER

✓ No account creation required — works in guest mode
✓ No email address needed to start
✓ No credit card, no trial period, no expiration
✓ 500 profiles + 1,000 messages every month
✓ Full Group Members & Mutual Groups scrapers included
✓ Upgrade only when your volume demands it

Install → Scrape → Download. That's it.

★ PRIVACY-FIRST ARCHITECTURE

✓ All scraping happens client-side in your browser
✓ Your data is never uploaded to our servers
✓ No background processes, no tracking of your conversations
✓ Credentials for Power Mode are stored locally in your browser
✓ Manifest V3 compliant — latest Chrome extension security standard
✓ Not affiliated with Telegram

★ PLANS

Free — 500 profiles + 1,000 messages per month. Scrape Group Members & Mutual Groups with Power Mode. No account needed.

Pro — 5,000 profiles + 10,000 messages per month. Power Mode unlocked for all four scrapers. Best for active operators.

Scale — 100,000 profiles + 500,000 messages per month. Full Power Mode. Built for high-volume scraping workflows.

Usage resets monthly. Billing handled securely by Stripe. Switch plans or cancel anytime.

★ GETTING STARTED

1. Install the extension and open Telegram Web (web.telegram.org)
2. The Mastros sidebar appears on the right
3. Pick a scraping mode
4. Follow the on-screen setup (each mode tells you exactly what to do)
5. Hit Start and watch the live progress feed
6. Download from the Export tab — done

★ SUPPORT

Questions or issues? Reach us at admin@mastros.online
Privacy policy: mastros.online/privacy
Terms of service: mastros.online/terms

You are responsible for compliance with Telegram's Terms of Service when using this tool.