Telegram TData, .session and JSON: choosing the right format
Match a Telegram session format to your client, check which files are included and keep authorization data private.
Choose a Telegram format that your client supports. TData, a .session file and JSON are not interchangeable simply because a seller calls all of them a session.
Match the format to the client
| Format | What to check |
|---|---|
| TData | The data package for Telegram Desktop and compatibility with your client version |
.session |
Which library created it; the extension alone is not enough |
| JSON | The file's purpose and fields, the import tool and any companion files required |
Telethon normally stores file sessions in SQLite and also supports a string session. JSON may hold configuration or account metadata; that file alone may not provide everything needed to authorize a client.
The official desktop client's source is available in the Telegram Desktop project. For a third-party tool, follow that tool's own documentation.
Ask before ordering
Tell the seller which client you intend to use. Ask about the delivered format, which files belong together and whether a separate 2FA password is required. If the description only says Session + JSON, ask what each file does.
In the Telegram category, also compare delivery and warranty conditions. Do not rely on a conversion step until compatibility with your intended client is confirmed.
Check the delivered package
Keep an original copy and import it using the instructions for the specified client. If a file is rejected, record the program, version and error message. Avoid sending the complete package to a series of unfamiliar converters.
Treat sessions as access credentials
Authorization data can grant account access. Keep TData and session files away from unknown upload sites and public reviews. If you suspect a leak, check active sessions in the official client.
The Telegram authorization documentation explains the underlying process. For missing delivery files, contact the seller through the order; Interzone support is available for order questions.