Hey there! Let's work through your problem with Telethon and Telegram account sessions— I’ve helped folks with similar issues before, so let’s break it down clearly.

First, let’s clarify a key point: Telegram’s official TDATA files and Telethon’s session files use completely different data structures, and there’s no reliable, safe way to convert one to the other. Any tools claiming to do this are either ineffective or pose a risk of stealing your account credentials, so you’re right to avoid that route.

Now, let’s address your main questions and concerns:

Why you’re facing ban risks (and how to fix it) #

The biggest red flag here is using public API IDs and hashes. When hundreds or thousands of accounts use the same API credentials, Telegram’s anti-abuse systems flag this as suspicious activity, leading to bans immediately. You must use your own, unique API ID and hash— here’s how:

• Go to my.telegram.org, log in with your Telegram account, and register a new application (it can be a desktop app, mobile app, or even a bot).
• You’ll get a unique api_id and api_hash— use these exclusively for your account management tool. This alone will drastically reduce ban risks.

Alternative ways to get a valid Telethon session (and JSON data) #

If converting TDATA isn’t an option, here are safe, legitimate methods:

• Generate a session via Telethon’s official login flow (lowest ban risk)
  As long as you follow these rules, the chance of getting banned is extremely low (most forum horror stories come from using public APIs or abnormal behavior):

  • Use the same IP address and device environment as your regular Telegram account (avoid proxies or virtual machines that don’t match your usual setup).
  • Make sure your account is active (log into the official client first, send a message, or browse channels to confirm it’s in good standing).
  • Use this simple code snippet to generate a session and export the necessary data to JSON:

    from telethon import TelegramClient
    import json
    
    # Replace with your own API credentials and phone number
    api_id = YOUR_PERSONAL_API_ID
    api_hash = "YOUR_PERSONAL_API_HASH"
    phone_number = "+YOUR_PHONE_NUMBER"
    
    # Initialize the client (this will create a .session file)
    client = TelegramClient("my_account_session", api_id, api_hash)
    
    async def export_session_data():
        await client.start(phone_number)
        # Extract key session details to save as JSON
        session_info = {
            "dc_id": client.session.dc_id,
            "server_address": client.session.server_address,
            "port": client.session.port,
            "auth_key": client.session.auth_key.hex()
        }
        # Save to JSON file
        with open("session_config.json", "w") as f:
            json.dump(session_info, f, indent=4)
        print("Session data exported to session_config.json successfully!")
    
    with client:
        client.loop.run_until_complete(export_session_data())
    

  When you run this, you’ll receive a verification code on your Telegram account— enter it, and the session will be created safely.

• Prep your account before generating the session
  If you’re still worried about bans, spend 1-2 days using the official Telegram client normally (chat with contacts, join a few public channels, post a message). This establishes your account as a legitimate user, making the Telethon login look far less suspicious.

Critical Do’s and Don’ts #

• Do use your own API ID/hash every time.
• Do match your login environment (IP, device) to your regular account usage.
• Don’t use third-party TDATA converters— they’re risky and unreliable.
• Don’t batch-generate sessions for multiple accounts at once, as this triggers anti-abuse systems.

备注：内容来源于stack exchange，提问作者Reac Bandella