You can export a complete Telegram thread while it remains accessible and readable. You can also export photos, videos, stickers, GIFs, and files.
First, download and install Telegram desktop. Once you have Telegram desktop installed, launch it, and log in to your existing Telegram account.
Select an existing chat.
This can be a 1:1 chat, group chat, or channel.
Then click the vertical 3-dot menu icon in the top right corner.
Click Export chat history.
Select the content you want to export and click EXPORT.
Take note, you can export up to 8MB at a time. You might need several iterations
Once the export is done click SHOW MY DATA.
Click the created HTML file in the new exported folder.
The exported data will be rendered in a chat display.
If you wish to archive the exported chats, you can zip the downloaded folder and send it via a Telegram Archiver app thread.