Developer builds TG Cleaner to bulk-leave Telegram groups without API credentials

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A developer who had accumulated 340 Telegram groups built a web tool called TG Cleaner after finding that manually leaving groups would take nearly four hours. Existing bulk-leave tools required users to create a Telegram developer account and generate API credentials, a process that took 15–30 minutes and posed a barrier for non-technical users. TG Cleaner eliminates that friction by routing authentication through a single registered Telegram application, so users only need to enter their phone number and a verification code. The tool, available as both a website and a Telegram Mini App via @TGCUtilityBot, lets users bulk-leave groups, mute or archive chats, and remove ghost contacts and bot DMs. It is built on a Python/Flask backend with Telethon for Telegram's MTProto layer, Celery and Redis for background tasks, and PostgreSQL for data storage.

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